Nabble - freebsd-smp

Re: Regarding enabling IOAPIC on Intel Dual core processor based boards having Broadcom controller

2009-12-02T06:39:28Z

On Tuesday 01 December 2009 5:00:06 pm Ravi Shankar wrote:

> Hi,
>
> We are using Freebsd6.2 bases OS on our LV 5200 Series Intel Dual Core Xeon
> bases processor(Wolfdale-DP-ULV). In the carrier board hosting the processor
> we have BCM5703 controller.
> Currently we are using only one core in 32 bit mode and planning to use dual
> core where we need to enable IOAPIC. When IOAPIC is not enabled I see the
> bcm/bge driver is attached to IRQ10 and everything works fine, but when I
> enable IOAPIC I still see the boot msgs show that bge is attached to irq10
> but the Broadcom controller does not come up. I found interrupt storm on
> irq17 ( remember without IOAPIC enable there are not IRQ assignments beyond
> IRQ16),looks like the controller is interrupting on 17 while driver waits on
> 10.
>
> When I stop and loader and assign it manually using config command "set
> hw.pci8.9.INTA.irq=”17”" , everything works fine. Would be great if some one
> can throw some light on this IRQ mapping when IOAPIC is enabled and possible
> fix ( Software or BIOS?)

This sounds like a BIOS issue. Are you using ACPI? If so, can you provide
the output of 'acpidump -t' along with a dmesg? If you aren't using ACPI, can
you provide the output of 'mptable' along with a dmesg?

--
John Baldwin
_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Regarding enabling IOAPIC on Intel Dual core processor based boards having Broadcom controller

2009-12-01T14:00:06Z

Hi,

We are using Freebsd6.2 bases OS on our LV 5200 Series Intel Dual Core Xeon
bases processor(Wolfdale-DP-ULV). In the carrier board hosting the processor
we have BCM5703 controller.
Currently we are using only one core in 32 bit mode and planning to use dual
core where we need to enable IOAPIC. When IOAPIC is not enabled I see the
bcm/bge driver is attached to IRQ10 and everything works fine, but when I
enable IOAPIC I still see the boot msgs show that bge is attached to irq10
but the Broadcom controller does not come up. I found interrupt storm on
irq17 ( remember without IOAPIC enable there are not IRQ assignments beyond
IRQ16),looks like the controller is interrupting on 17 while driver waits on
10.

When I stop and loader and assign it manually using config command "set
hw.pci8.9.INTA.irq=”17”" , everything works fine. Would be great if some one
can throw some light on this IRQ mapping when IOAPIC is enabled and possible
fix ( Software or BIOS?)

Thanks,
Ravi

--
Thanks,
Ravi
"The most influential person who will talk to you all day is you, so
you should be very careful about what you say to you!"
_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Twitter-endlich Geldverdienen-kostenlos und sofort startklar

2009-10-15T06:44:03Z

Offers stand below as an English available Hallo-
                                        verdiene endlich Geld durch
Twitterwenn ein Twitter Account vorhanden sein sollte dann gehts sofort los
mit Verdienen.sollte keine Account vorhanden sein dann einfach alles
kostenlos erstellen und verdienen. mit besten Empfehlungen eure
Danielleichter kann man sein ´Geld nicht verdienen- alles kostenlos wenn
sie einen Twitteraccount haben.Also schnell handel-bei weiterem Interesse
und lust an gratis produkten einfach kurz anmelden-oder abmelden--
danke  Anmelden       Abmelden 24 Std. Blitzangebot nur begrenzt für 24
Stunden aktiv danach ausverkauft---
http://www.affiliateverkaufen.de/blitzangebot.html     10,-?(The Logo
Creator hilft beim Erstellen qualitativ hochwertiger Logos. Ganz nach dem
Motto "Your Logo is your business" gestaltet der Nutzer mit diesem Programm
Blickfänger für Webseiten) (Übersetzen Sie ganz einfach und mit wenigen
Klicks Texte oder sogar komplette Webseiten in 31 Sprachen. )nur 28,-? oder
Aktionspreis 30,-?   für Logocreator v5 und PDF-Converter 6.0 dt. Oder
möchten sie lieber effektiv heute noch Geld verdienen und Zahlungen wenn
möglich sofort erwirtschaften-??
dann mit diesem angebot was für mich selbstbehauptet das beste überhaupt
war und ist--Geld durch Emails verdienen-aber keine centbeträge sondern sofort
10-20,-? sofort-zahlung innerhalb weniger minuten, ich habe zur zeit
zwischen 5 und 20 Kunden pro tag (weltweit) bei einem verdienst pro email
von ca. 15,-?
und ich betreibe keinerlei werbung oder verkaufe durchs telefon nein die
Kunden kommen zu mir und ich verdiene sehr gut-aber lesen sie selbst wenn
ihr interesse noch vorhanden ist weiter im Angebot 2.erfolgreiches Handeln
wünsche ich auf diesem Wege-bei weiteren Interessen können sie
sichwiederholt eintragen um weitere Angebote und Gratis Geschenke zu
erhalten........................(oder Abmelden).... Anmelden     Abmelden
Hello- finally earn money by Twitterthen immediately feels wrong with
earning if a Twitter account should be available. no-one should account be
available simply then everything free of charge make and earn. with best
recommendations yours Danielone can more easily money not earning
everything be ' free if they have a Twitteraccount. -therefore act fast
simply registering or cancelling at broader interest and desire at free
products briefly, thank youBookingCancelling24 hour lightning supply sold
off according to that actively for 24 hours only restrictedly -
http://www.affiliateverkaufen.de/blitzangebot.html 10. ? (A The logo
Creator helps to make high-quality logos. According to the motto "Your logo
is your business" the user completely forms with this programme eye-catcher
for web pages.)    (Translate texts or even complete web pages for only
simply and a few clicks into 31 languages.) only 28. ? or special-offer
price 30. ? for Logocreator v5 and PDF-Converter of 6.0 dt. -or they would
rather, today, still earn money effectively and immediately gain payments
if possible?
with this supply did but no cent amounts what was self claimed for me the
best at all and is?
I have 10-20,- ? immediately payment within less minutes, between 5 and 20
customers per day (worldwide) at an income per e-mail from approx. 15. ? at
the moment
by the telephone the customers no come to me and I earn very well and I
operate no advertising or sell but read them even if their interest is
still further existing in the supply 2. Angebot 2.I wish on this at broader
interests be able to do them himself a successful action waystyping
repeated ........................ in to receive further offers and free
presents. (or cancel ) ..... Booking Cancelling

_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Re: 6.2-RELEASE does not use second CPU on pentium D

2009-10-13T07:40:55Z

On Wednesday 25 April 2007 4:47:48 am Alex Povolotsky wrote:
> Hello!
>
> I have a Pentium D box, running 6.2-RELEASE. In dmesg, I see CPU#1
> launched, but I never see any process running on it, and mptable shows
>
> cluster-one# mptable -verbose
>
>
===============================================================================

>
> MPTable
>
> looking for EBDA pointer @ 0x040e, found, searching EBDA @ 0x0009e800
> searching CMOS 'top of mem' @ 0x0009e400 (633K)
> searching default 'top of mem' @ 0x0009fc00 (639K)
> searching BIOS @ 0x000f0000
>
> MP FPS found in BIOS @ physical addr: 0x000fe200
>
> -------------------------------------------------------------------------------
>
> MP Floating Pointer Structure:
>
> location: BIOS
> physical address: 0x000fe200
> signature: '_MP_'
> length: 16 bytes
> version: 1.4
> checksum: 0x9f
> mode: Virtual Wire
>
> -------------------------------------------------------------------------------
>
> MP Config Table Header:
>
> physical address: 0x000fe210
> signature: 'PCMP'
> base table length: 64
> version: 1.4
> checksum: 0x7f
> OEM ID: ''
> Product ID: ''
> OEM table pointer: 0x00000000
> OEM table size: 0
> entry count: 1
> local APIC address: 0xfee00000
> extended table length: 0
> extended table checksum: 0
>
> -------------------------------------------------------------------------------
>
> MP Config Base Table Entries:
>
> --
> Processors: APIC ID Version State Family Model Step
> Flags
> 0 0x14 BSP, usable 15 6 4
> 0xbfebfbff
>
>

===============================================================================

>
> while in dmesg
>
> Copyright (c) 1992-2007 The FreeBSD Project.
> Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
> The Regents of the University of California. All rights reserved.
> FreeBSD is a registered trademark of The FreeBSD Foundation.
> FreeBSD 6.2-RELEASE-p3 #2: Thu Apr 19 00:19:54 MSD 2007
> tarkhil@...:/usr/obj/usr/src/sys/P4D
> WARNING: debug.mpsafenet forced to 0 as ipsec requires Giant
> WARNING: MPSAFE network stack disabled, expect reduced performance.
> Timecounter "i8254" frequency 1193182 Hz quality 0
> CPU: Intel(R) Pentium(R) D CPU 2.80GHz (2808.41-MHz 686-class CPU)
> Origin = "GenuineIntel" Id = 0xf64 Stepping = 4
>
>

Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH

> ,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
> Features2=0xe49d<SSE3,RSVD2,MON,DS_CPL,EST,CNTX-ID,CX16,<b14>,<b15>>
> AMD Features=0x20100000<NX,LM>
> AMD Features2=0x1<LAHF>
> real memory = 1046757376 (998 MB)
> avail memory = 1015095296 (968 MB)
> ACPI APIC Table: <INTEL DG965SS >
> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
> cpu0 (BSP): APIC ID: 0
> cpu1 (AP): APIC ID: 1
> ioapic0: Changing APIC ID to 2
> ioapic0 <Version 2.0> irqs 0-23 on motherboard
>
> [...]
> SMP: AP CPU #1 Launched!
>
> The kernel is, of course, SMP.
>
> What can I do, where can I search for solution?
>
> Second core IS enabled in BIOS
> cluster-one# sysctl hw | grep cpu
> hw.ncpu: 2
> hw.acpi.cpu.cx_supported: C1/0
> hw.acpi.cpu.cx_lowest: C1
> hw.acpi.cpu.cx_usage: 100.00%
> cluster-one# sysctl machdep | grep cpu
> machdep.cpu_idle_hlt: 1
> machdep.hlt_cpus: 2
> machdep.hlt_logical_cpus: 0
> machdep.logical_cpus_mask: 2
>
> so second CPU is halted, attempt to start it with sysctl does not help
> Alex.

What does 'sysctl machdep | grep hyper' show?

--
John Baldwin
_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Re: 6.2-RELEASE does not use second CPU on pentium D

2009-10-10T18:43:27Z

6.2 is really quite old now, does 7.x or even 8.x work?

Regards
Steve
----- Original Message -----
From: "Alex Povolotsky" <tarkhil@...>

> I have a Pentium D box, running 6.2-RELEASE. In dmesg, I see CPU#1
> launched, but I never see any process running on it, and mptable shows
...

================================================
This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it.

In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337
or return the E.mail to postmaster@....

_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Re: LOCK_PROFILING

2009-08-21T02:10:02Z

Hi John,

On 8/19/09 4:57 AM, "John Baldwin" <jhb@...> wrote:
>
> It sounds like a tripe fault. I suspect you are recursing on your stack
> somehow leading to a double fault that faults again trying to get a lock to
> output to the console perhaps (that would explain the lack of double fault
> messages if that were the case). Perhaps a lock used in the profiling is
> incorrectly being profiled?

Yes, this is right!!

The clock_lock was not initialized with MTX_NOPROFILE, and we ended up
profiling the clock_lock recursively until we overflowed the stack. Thanks
for pointing out.

Thanks,
Pramod

_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Re: LOCK_PROFILING

2009-08-19T04:57:01Z

On Wednesday 19 August 2009 2:30:25 am Pramod Srinivasan wrote:

> Hi Folks,
>
> I have a difficult problem I am stuck with, we had ported LOCK_PROFILING to
> FreeBSD 6.1 and is working fine on mips, but fails miserably on i386.
>
> Just enabling lock profiling by the sysctl causes the cpu to reset.
>
> root@bcdcpu3% sysctl debug.lock.prof.enable=1
> debug.lock.pr? << cpu resets here
>
> Has any one seen similar issues? Any pointers on where to start debugging
> this issue?
>
> The suspicion is that the spin-lock is perhaps contributing to the problem,
> but have not been able to get to the bottom.

It sounds like a tripe fault. I suspect you are recursing on your stack
somehow leading to a double fault that faults again trying to get a lock to
output to the console perhaps (that would explain the lack of double fault
messages if that were the case). Perhaps a lock used in the profiling is
incorrectly being profiled?

--
John Baldwin
_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

LOCK_PROFILING

2009-08-18T23:30:25Z

Hi Folks,

I have a difficult problem I am stuck with, we had ported LOCK_PROFILING to
FreeBSD 6.1 and is working fine on mips, but fails miserably on i386.

Just enabling lock profiling by the sysctl causes the cpu to reset.

root@bcdcpu3% sysctl debug.lock.prof.enable=1
debug.lock.pr? << cpu resets here

Has any one seen similar issues? Any pointers on where to start debugging
this issue?

The suspicion is that the spin-lock is perhaps contributing to the problem,
but have not been able to get to the bottom.

Thanks,
Pramod

_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Fam Trip to TURKEY for $999 (Refundable)

2009-07-09T09:20:56Z

[http://www.turkeycallingus.com/]

Exclusive Boutique Enterprise

Turkey FAM
ISTANBUL - CAPPADOCIA - KONYA - ANTALYA - PAMUKKALE - KUSADASI
9 Nights / 11 Days $999

• 5 Continents • 150 Countries Worldwide • 100.000 Hotels •
Instant Confirmation

[http://www.turkeycallingus.com]

[http://www.turkeycallingus.com/turkey-fam/TurkeyFam.htm]
[http://www.turkeycallingus.com/turkey-fam/TurkeyFamItinerary.htm]
[http://www.turkeycallingus.com/turkey-fam/TurkeyFamRates.htm]
[http://www.turkeycallingus.com/turkey-fam/TurkeyFamServices.htm]
[http://www.turkeycallingus.com/turkey-fam/TurkeyFamHotels.htm]

Global Access proudly presents the biggest FAM Trip of the year, teaming
with Turkish Airlines and Turkish Ministry of Tourism and Culture.

As the host of ASTA IDE 2010 and European Capital of Culture 2010, Turkey
is likely to be the one of the most popular destinations in 2010. Those who
act early and get to know this beautiful country better will be able to
give a better insight to their clients and secure more bookings.

Our specially selected travel agents will stay in best hotels in each
town, be escorted by professional, top tour guides, taste exceptionally
good examples of Turkish Cuisine, and get to know Turkey in elegant way.

Join us for a luxury FAM adventure and be our special guest in our
beautiful country!

COMBINE WITH World Travel Market!

One of the biggest travel shows of Europe and the world, WTM, will be
held in London between 9-12 November 2009. Combine your London trip with
Turkey and benefit from great agent rates to see one of the most popular
tourist destinations from USA and Canada.
WE WILL REFUND YOUR MONEY BACK !

Upon booking your 20th passenger on a Global Access Travel Service, we
will refund you the whole tour price that you’ve paid for the FAM Trip.

If you book 20 or more people on a Global Access Travel Service before
the FAM Trip starts, then you will travel for free!

About Us Global Access Travel (GA) was founded in Turkey by a group of
tourism professionals and marketing experts who recognized the needs to
offer online services for accommodations, car rentals, and other travel
related services to travel agencies.
Through its sophisticated online reservation services, GA offers more
than 100,000 hotels, motels, resorts, clubs and apartments all around the
world.
Other services of GA include car rentals, transfers, special tours,
luxury services, city breaks, flight tickets and other services such as
tailor made tour packages, exhibition organizations, incentives and other
travel related services around the globe at competitive rates.

[http://www.TurkeyCallingus.com] www.TurkeyCalling.us
[http://www.turkeycallingus.com/turkey-calling-contact-us.htm]

Global Access Travel
Tel: +90 212 258 58 29 Fax: +90 212 258 34 47
E-mail : [mailto:incoming@...] incoming@... Website:
[http://www.turkeycallingus.com/] www.TurkeyCalling.Us
This message was sent by: FamTrit turkey, Nüzhetiye Cad., istanbul, besiktas 34357, Turkey

To be removed click here:
http://app.icontact.com/icp/mmail-mprofile.pl?r=47131395&l=82243&s=LZDL&m=578549&c=305227

Forward to a friend:
http://app.icontact.com/icp/sub/forward?m=578549&s=47131395&c=LZDL&cid=305227

_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Jean Dupre a partagé un message avec vous sur Pulse

2009-07-03T12:42:29Z

Jean Dupre a partagÃ© un message avec vous sur Pulse et
souhaitait vous le faire savoir.

http://www.plaxo.com/public/event/189178955319?src=email&et=6&el=fr_o1&key=70634ecb3f154d61ab941ea5fed30e573283e72f&email=freebsd-smp%40freebsd.org&share_id=4662481&share_key=250070418&name=&webmailfix=1&lang=fr

Besoin de prÃªt ?

Bonjour,
Je suis DUPRE JEAN ALBERT. Ancien thÃ©rapeute, financier suisse
et Directeur dâÃ©tude de projets dans une banque.
J'octroie des prÃªts Ã toute personne dÃ©sireuse selon les
critÃ¨res suivants:

Choix du montant : Ã partir de 15.000 â¬
Choix de la durÃ©e de remboursement : 8 ans maximum
TEG annuel fixe : 2,15%* (*offre soumise Ã condition)

En option : lâassurance e...
http://www.plaxo.com/public/event/189178955319?src=email&et=6&el=fr_o1&key=70634ecb3f154d61ab941ea5fed30e573283e72f&email=freebsd-smp%40freebsd.org&share_id=4662481&share_key=250070418&name=&webmailfix=1&lang=fr

Merci !
L'Ã©quipe Plaxo

Plus de 20Â millions de personnes utilisent Plaxo pour rester en
contact avec leur entourage dans le cadre privÃ© comme
professionnel.

Vous ne voulez plus recevoir d'e-mails de PlaxoÂ ? Rendez-vous
surÂ :
http://www.plaxo.com/stop?src=email&et=6&el=fr_o1&email=freebsd-smp%40freebsd.org

_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Re: [PATCH] Adaptive spinning for lockmgr

2009-06-14T08:00:41Z

Attilio Rao wrote:

> 2009/6/14 Kris Kennaway <kris@...>:
>> Attilio Rao wrote:
>>> This patch enables adaptive spinning for lockmgr:
>>> http://www.freebsd.org/~attilio/adaptive_lockmgr.diff
>>>
>>> and it should presumably improve performance on disks/vfs/buffer cache
>>> based benchmarks, so, if you want to try out and report any benchmarks
>>> result, I'd love to see it.
>>> Please note that there are some parameters to tune: for example, you
>>> would like to not enable adaptive spinning to default while you just
>>> want that for a class of locks (and in that case you want to apply the
>>> reversed logic for what is living now) or you want to use different
>>> values for retries and loops. Interested developers can refer to such
>>> 3 variables.
>>> Peter Holm alredy tested that patch for about 24hours without any
>>> regression to report.
>>>
>>> Also note that the patch is not 100% yet as long as it needs UPDATES
>>> and manpages updates, but they will be added just in time before to
>>> commit.
>>> The modify is all there.
>> I have a vague memory that we had tested a version of this in the past and
>> found that it caused a performance loss in common cases? Many lockmgr
>> callers are not amenable to adaptive spinning because they have to wait on
>> slow I/O. Testing only with e.g. md backing might give results that are
>> non-representative.
>
> I don't think I ever implemented adaptive spinning in lockmgr so if
> somebody else did I don't know. Said that, probabilly the best
> approach would be to disable it by default ad use a LK_ADAPTIVESPIN
> flag on a per instance basis.
> Such conditions, though, need to be explored a bit and I have no time
> to dedicate to this right now.

OK, I am mis-remembering then. Ideally it would be tested in several
representative workloads to see where it helps. I can't promise whether
I can do this though, for the same reason as you :(

Kris
_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Re: [PATCH] Adaptive spinning for lockmgr

2009-06-14T07:23:11Z

2009/6/14 Kris Kennaway <kris@...>:

> Attilio Rao wrote:
>>
>> This patch enables adaptive spinning for lockmgr:
>> http://www.freebsd.org/~attilio/adaptive_lockmgr.diff
>>
>> and it should presumably improve performance on disks/vfs/buffer cache
>> based benchmarks, so, if you want to try out and report any benchmarks
>> result, I'd love to see it.
>> Please note that there are some parameters to tune: for example, you
>> would like to not enable adaptive spinning to default while you just
>> want that for a class of locks (and in that case you want to apply the
>> reversed logic for what is living now) or you want to use different
>> values for retries and loops. Interested developers can refer to such
>> 3 variables.
>> Peter Holm alredy tested that patch for about 24hours without any
>> regression to report.
>>
>> Also note that the patch is not 100% yet as long as it needs UPDATES
>> and manpages updates, but they will be added just in time before to
>> commit.
>> The modify is all there.
>
> I have a vague memory that we had tested a version of this in the past and
> found that it caused a performance loss in common cases? Many lockmgr
> callers are not amenable to adaptive spinning because they have to wait on
> slow I/O. Testing only with e.g. md backing might give results that are
> non-representative.

I don't think I ever implemented adaptive spinning in lockmgr so if
somebody else did I don't know. Said that, probabilly the best
approach would be to disable it by default ad use a LK_ADAPTIVESPIN
flag on a per instance basis.
Such conditions, though, need to be explored a bit and I have no time
to dedicate to this right now.

Thanks,
Attilio

--
Peace can only be achieved by understanding - A. Einstein
_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Re: [PATCH] Adaptive spinning for lockmgr

2009-06-14T06:01:43Z

Attilio Rao wrote:

> This patch enables adaptive spinning for lockmgr:
> http://www.freebsd.org/~attilio/adaptive_lockmgr.diff
>
> and it should presumably improve performance on disks/vfs/buffer cache
> based benchmarks, so, if you want to try out and report any benchmarks
> result, I'd love to see it.
> Please note that there are some parameters to tune: for example, you
> would like to not enable adaptive spinning to default while you just
> want that for a class of locks (and in that case you want to apply the
> reversed logic for what is living now) or you want to use different
> values for retries and loops. Interested developers can refer to such
> 3 variables.
> Peter Holm alredy tested that patch for about 24hours without any
> regression to report.
>
> Also note that the patch is not 100% yet as long as it needs UPDATES
> and manpages updates, but they will be added just in time before to
> commit.
> The modify is all there.

I have a vague memory that we had tested a version of this in the past
and found that it caused a performance loss in common cases? Many
lockmgr callers are not amenable to adaptive spinning because they have
to wait on slow I/O. Testing only with e.g. md backing might give
results that are non-representative.

Kris
_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

[PATCH] Adaptive spinning for lockmgr

2009-06-08T13:42:35Z

This patch enables adaptive spinning for lockmgr:
http://www.freebsd.org/~attilio/adaptive_lockmgr.diff

and it should presumably improve performance on disks/vfs/buffer cache
based benchmarks, so, if you want to try out and report any benchmarks
result, I'd love to see it.
Please note that there are some parameters to tune: for example, you
would like to not enable adaptive spinning to default while you just
want that for a class of locks (and in that case you want to apply the
reversed logic for what is living now) or you want to use different
values for retries and loops. Interested developers can refer to such
3 variables.
Peter Holm alredy tested that patch for about 24hours without any
regression to report.

Also note that the patch is not 100% yet as long as it needs UPDATES
and manpages updates, but they will be added just in time before to
commit.
The modify is all there.

Thanks,
Attilio

--
Peace can only be achieved by understanding - A. Einstein
_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Re: Show which CPU is executing a thread?

2009-06-02T05:39:00Z

On Monday 01 June 2009 10:38:39 am nocturnal wrote:
> I'm more after a programming API for this and when i search the web all i
> find is people saying it cannot be done on FreeBSD in userspace, yet.
>
> Solaris and Linux can do it but FreeBSD doesn't have this in user space.
>
> Is anyone working on it, what is the status? Will it be part of SMPng?

First of all, why do you need to know this? There are APIs to let you bind
yourself to specific CPUs, but there is not a convenient way to figure out
which CPU you are on. Probably because unless you bind yourself to a
specific CPU, the knowledge is quite useless and racy (you can be preempted
in userland at any time and be migrated to another CPU unless you have bound
yourself to a CPU). If you do bind yourself to a CPU, then you should know
which one you are bound to. :) (And you can also query your binding set.)

--
John Baldwin
_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Re: Show which CPU is executing a thread?

2009-06-02T05:07:26Z

One last question, with what frequency is the information in kinfo_proc
updated in virtual memory?

I've ran into issues where an invalid value is returned intermittently so i
fear that i'm polling the kernel too often for this info.

2009/6/2 nocturnal <swehack@...>

> Disregard my last e-mail, i found the very extensive structure of
> kinfo_proc in sys/user.h.
>
> 2009/6/2 nocturnal <swehack@...>
>
> First of all thank you for your help Dan.
>>
>> One last question though, does anyone have the structure of the kinfo_proc
>> struct? In kvm.h it seems to be defined transparently and i would very much
>> like to know where in this struct i can find the CPU ID.
>>
>> 2009/6/1 Dan Nelson <dnelson@...>
>>
>> In the last episode (Jun 01), nocturnal said:
>>> > 2009/6/1 nocturnal <swehack@...>
>>> > > I've been searching the web, all i want is to show which CPU is
>>> > > currently executing a certain thread. Is this info available to me
>>> in
>>> > > user space? Which manuals should i read to do this?
>>> > >
>>> > > I know Solaris has something about lwp that can show the last CPU
>>> used,
>>> > > i think. I would be happy if FreeBSD had something similar so it
>>> > > doesn't have to be very live or accurate.
>>> > >
>>> > > Thank you in advance for any info or hints.
>>> >
>>> > I'm more after a programming API for this and when i search the web all
>>> i
>>> > find is people saying it cannot be done on FreeBSD in userspace, yet.
>>> >
>>> > Solaris and Linux can do it but FreeBSD doesn't have this in user
>>> space.
>>>
>>> FreeBSD can and does. See the kvm_getprocs manpage, and take a look at
>>> /usr/src/bin/ps/ps.c or /usr/src/usr.bin/top/machine.c to see how it's
>>> used.
>>>
>>> > Is anyone working on it, what is the status? Will it be part of SMPng?
>>>
>>> SMPng went into FeeeBSD 5.0.. you must be reading some old mailing list
>>> archives :)
>>>
>>> --
>>> Dan Nelson
>>> dnelson@...
>>> _______________________________________________
>>> freebsd-smp@... mailing list
>>> http://lists.freebsd.org/mailman/listinfo/freebsd-smp
>>> To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."
>>>
>>
>>
>>
>> --
>>
>>
>> Med vänliga hälsningar
>>
>> Stefan Midjich aka nocturnal
>> [SWEHACK] http://swehack.se
>>
>
>
>
> --
>
>
> Med vänliga hälsningar
>
> Stefan Midjich aka nocturnal
> [SWEHACK] http://swehack.se
>

--

Med vänliga hälsningar

Stefan Midjich aka nocturnal
[SWEHACK] http://swehack.se
_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Re: Show which CPU is executing a thread?

2009-06-02T04:05:11Z

Disregard my last e-mail, i found the very extensive structure of kinfo_proc
in sys/user.h.

2009/6/2 nocturnal <swehack@...>

> First of all thank you for your help Dan.
>
> One last question though, does anyone have the structure of the kinfo_proc
> struct? In kvm.h it seems to be defined transparently and i would very much
> like to know where in this struct i can find the CPU ID.
>
> 2009/6/1 Dan Nelson <dnelson@...>
>
> In the last episode (Jun 01), nocturnal said:
>> > 2009/6/1 nocturnal <swehack@...>
>> > > I've been searching the web, all i want is to show which CPU is
>> > > currently executing a certain thread. Is this info available to me in
>> > > user space? Which manuals should i read to do this?
>> > >
>> > > I know Solaris has something about lwp that can show the last CPU
>> used,
>> > > i think. I would be happy if FreeBSD had something similar so it
>> > > doesn't have to be very live or accurate.
>> > >
>> > > Thank you in advance for any info or hints.
>> >
>> > I'm more after a programming API for this and when i search the web all
>> i
>> > find is people saying it cannot be done on FreeBSD in userspace, yet.
>> >
>> > Solaris and Linux can do it but FreeBSD doesn't have this in user space.
>>
>> FreeBSD can and does. See the kvm_getprocs manpage, and take a look at
>> /usr/src/bin/ps/ps.c or /usr/src/usr.bin/top/machine.c to see how it's
>> used.
>>
>> > Is anyone working on it, what is the status? Will it be part of SMPng?
>>
>> SMPng went into FeeeBSD 5.0.. you must be reading some old mailing list
>> archives :)
>>
>> --
>> Dan Nelson
>> dnelson@...
>> _______________________________________________
>> freebsd-smp@... mailing list
>> http://lists.freebsd.org/mailman/listinfo/freebsd-smp
>> To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."
>>
>
>
>
> --
>
>
> Med vänliga hälsningar
>
> Stefan Midjich aka nocturnal
> [SWEHACK] http://swehack.se
>

Re: Show which CPU is executing a thread?

2009-06-02T03:55:51Z

First of all thank you for your help Dan.

One last question though, does anyone have the structure of the kinfo_proc
struct? In kvm.h it seems to be defined transparently and i would very much
like to know where in this struct i can find the CPU ID.

2009/6/1 Dan Nelson <dnelson@...>

> In the last episode (Jun 01), nocturnal said:
> > 2009/6/1 nocturnal <swehack@...>
> > > I've been searching the web, all i want is to show which CPU is
> > > currently executing a certain thread. Is this info available to me in
> > > user space? Which manuals should i read to do this?
> > >
> > > I know Solaris has something about lwp that can show the last CPU used,
> > > i think. I would be happy if FreeBSD had something similar so it
> > > doesn't have to be very live or accurate.
> > >
> > > Thank you in advance for any info or hints.
> >
> > I'm more after a programming API for this and when i search the web all i
> > find is people saying it cannot be done on FreeBSD in userspace, yet.
> >
> > Solaris and Linux can do it but FreeBSD doesn't have this in user space.
>
> FreeBSD can and does. See the kvm_getprocs manpage, and take a look at
> /usr/src/bin/ps/ps.c or /usr/src/usr.bin/top/machine.c to see how it's
> used.
>
> > Is anyone working on it, what is the status? Will it be part of SMPng?
>
> SMPng went into FeeeBSD 5.0.. you must be reading some old mailing list
> archives :)
>
> --
> Dan Nelson
> dnelson@...
> _______________________________________________
> freebsd-smp@... mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-smp
> To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."
>

Re: Show which CPU is executing a thread?

2009-06-01T09:32:30Z

In the last episode (Jun 01), nocturnal said:

> 2009/6/1 nocturnal <swehack@...>
> > I've been searching the web, all i want is to show which CPU is
> > currently executing a certain thread. Is this info available to me in
> > user space? Which manuals should i read to do this?
> >
> > I know Solaris has something about lwp that can show the last CPU used,
> > i think. I would be happy if FreeBSD had something similar so it
> > doesn't have to be very live or accurate.
> >
> > Thank you in advance for any info or hints.
>
> I'm more after a programming API for this and when i search the web all i
> find is people saying it cannot be done on FreeBSD in userspace, yet.
>
> Solaris and Linux can do it but FreeBSD doesn't have this in user space.

FreeBSD can and does. See the kvm_getprocs manpage, and take a look at
/usr/src/bin/ps/ps.c or /usr/src/usr.bin/top/machine.c to see how it's used.

> Is anyone working on it, what is the status? Will it be part of SMPng?

SMPng went into FeeeBSD 5.0.. you must be reading some old mailing list
archives :)

--
Dan Nelson
dnelson@...
_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Re: Show which CPU is executing a thread?

2009-06-01T07:38:39Z

I'm more after a programming API for this and when i search the web all i
find is people saying it cannot be done on FreeBSD in userspace, yet.

Solaris and Linux can do it but FreeBSD doesn't have this in user space.

Is anyone working on it, what is the status? Will it be part of SMPng?

2009/6/1 nocturnal <swehack@...>

> I've been searching the web, all i want is to show which CPU is currently
> executing a certain thread. Is this info available to me in user space?
> Which manuals should i read to do this?
>
> I know Solaris has something about lwp that can show the last CPU used, i
> think. I would be happy if FreeBSD had something similar so it doesn't have
> to be very live or accurate.
>
> Thank you in advance for any info or hints.
>
> --
>
>
> Med vänliga hälsningar
>
> Stefan Midjich aka nocturnal
> [SWEHACK] http://swehack.se
>

Re: Show which CPU is executing a thread?

2009-06-01T04:35:50Z

2009/6/1 nocturnal <swehack@...>:

Does top and the -H flag not do what you want?
There is also ps -H

Hope this helps
Andrew
_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Re: Show which CPU is executing a thread?

2009-06-01T04:34:48Z

On Mon, Jun 1, 2009 at 3:57 AM, nocturnal <swehack@...> wrote:

You can use top and look at the C column for currently used cpu for process.
_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Show which CPU is executing a thread?

2009-06-01T03:57:46Z

I've been searching the web, all i want is to show which CPU is currently
executing a certain thread. Is this info available to me in user space?
Which manuals should i read to do this?

I know Solaris has something about lwp that can show the last CPU used, i
think. I would be happy if FreeBSD had something similar so it doesn't have
to be very live or accurate.

Thank you in advance for any info or hints.

--

Med vänliga hälsningar

Stefan Midjich aka nocturnal
[SWEHACK] http://swehack.se
_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

SA Webs your link to the world wide web!

2009-05-19T13:23:13Z

SA Webs your link to the world wide web!

Let us assist you in making your very own footprint on the web.

Complimentary web design to the value of R2500.00

Complimentary use of a domain name

(info@... <mailto:info@...>
)

Complimentary search engine optimization on local, national and
international search engines.

Comprehensive web stats.

1 personalised email address (info@...
<mailto:info@...>
)

NO CONTRACTS

HOSTING IS ON A MONTH TO MONTH BASIS

FOR JUST "R149" PER MONTH

Already have a website?

COMPLIMENTARY EVALUATION

SA Webs will evaluate your website in terms of speed, compatibility
of search engines and the overall quality of your design.

Offer ends 22 May 2009

"SA Webs linking you to the world"

To get started now! - Contact us

e-mail info@... Call SA Webs now on 0861 10 11 52

--
If you do not want to receive any more newsletters,
http://www.sa-webs.co.za/lists/?p=unsubscribe&uid=f7d2f6740a56786bde306dfa43662565

To update your preferences and to unsubscribe visit
http://www.sa-webs.co.za/lists/?p=preferences&uid=f7d2f6740a56786bde306dfa43662565
Forward a Message to Someone
http://www.sa-webs.co.za/lists/?p=forward&uid=f7d2f6740a56786bde306dfa43662565&mid=20

--
Powered by PHPlist, www.phplist.com --

_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Welcome to Chase Online

2009-05-17T19:55:07Z

_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

National Lottery: Your Email Won

2009-05-10T08:31:39Z

United Kingdom National Lottery
101 Bovill Road, London
SE23 1EL United Kingdom

File #: EGS/2251256003/02

Congratulations, we are pleased to inform you of the result of the United Kingdom National Lottery Award Winners. Your email address have been randomly selected as a winner in the ongoing United Kingdom National Lottery Online program, the draw was held on 30th April, 2009 using a computerized balloting system of selection. The United Kingdom National Lottery is aimed and focused at global development and improvement of living standard across the world.

Free £77 Million Pounds won including *four* Ten Million Pounds Winners and *fourteen* Millionaires plus thousands of other cash prizes. Winner from all over the world, India, France, Singapore, USA, United Kingdom, Spain, South America, Malaysia, Indonesia, South Africa, Belgium, Denmark, Ireland and many more.

We wish to express our sincere apologies for the late notification, this free award online program is been conducted bi-quarterly. United Kingdom National Lottery Free Award draw was conducted at the Europe Issuing Centre, you were selected from an exclusive list of 1,000,000,000 e-mail addresses of internet users from the following categories; consumers, professionals and corporate bodies picked by an advanced automated random computer ballot search from the internet 'NO TICKETS OR DRAFTS WERE SOLD'.

Your email address attached to Security File #: EGS/2251256003/02 with Serial number No: 002839 emerged as a winner of Six Hundred Thousand Pounds (£600.000.00 GBP), therefore you are eligible to file claim for your prize as one of our lucky winners for the payout of your total sum after a thorough verification that will be conducted by our various credible financial institutions.

This online program is precisely aimed at enabling all internet users across the world benefit from the United Kingdom National Lottery, your email address falls within the First Category Winner as such your file has been designated to our European Centre, where the complete verification and payout will be conducted only if there are no exceptions during the claims process, to file your claim immediately please contact our International Programs Director Anderson Spencer with the following information:

1. Name in full-----------------------------------------
2. Phone/Fax-------------------------------------------
3. Occupation------------------------------------------

TO:

Contact Person: Anderson Spencer
European Payment Issuing Office
Tel: +447024065192 (8am - 5pm GMT)
Fax: +447092894160
Email: zonal.anderson-spencer@...

NOTE: In order to benefit from this program, you are advised in your own best interest to file your claim not later than 7days days from the date of this notification to avoid disqualification; anybody under the age of 18 is automatically disqualified.

Please include this File #: EGS/2251256003/02 in every of your correspondence with our Foreign Service Director Anderson Spencer.

IMPORTANT: Solemn confidentiality should be ensured until successful remittance of your prize to you to avoid undue taking of advantage, unwarranted claim and abuse of program, any breach of confidentiality on the part of the winner will result to automatic disqualification.

Sincerely Yours,

Mrs. Julie Van Hans,
Executive Director.
United Kingdom National Lottery.

_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Private Shore Excursions-Turkey

2009-04-09T00:22:30Z

[http://www.turkeycalling.us]

PRIVATE SHORE EXCURSIONS- TURKEY

Your cruise clients will make the best of their time in Turkey on a
private shore excursion!

Istanbul

Kusadasi & Ephesus

[mailto:incoming@...?subject=Private Shore Excursions- Turkey]

****************************************************************************

Yasal Uyarı;
Bu e-posta, sadece adreste belirtilen kisi veya kurulusun kullanimini
hedeflemekte olup,mesajda yer alan bilgiler kisiye ozel ve gizli olabilir,
yasalar ya da anlasmalar geregi ücüncü kisiler ile paylasilmasi mümkün
olmayabilir.Mesaji alan kisi, mesajin gönderilmek istendigi kisi veya
kurulus degilse,bu mesaji yaymak,dagitmak veya kopyalamak yasaktir Mesaj
tarafiniza yanlislikla ulasmissa lütfen mesaji geri gönderiniz ve
sisteminizden siliniz. Global Turizm Hizmetleri Anonim Sirketi bu mesajin
icerigi ile ilgili olarak hicbir hukuksal sorumlulugu kabul etmez.

****************************************************************************

Disclaimer;
This e-mail communication is intended only for the use of the individual
or entity to which it is addressed, and may contain information that is
privileged, confidential and that may not be made public by law or
agreement. If the recipient of this message is not the intended recipient
or entity, you are hereby notified that any further dissemination,
distribution or copying of this information is strictly prohibited. If you
have received this message in error, please immediately notify the sender
and delete it from your system. The Global Turizm Hizmetleri Anonim Sirketi
does not accept legal responsibility for the contents of this message.

***********************************************************************************************

Yasal Uyarı;
Bu e-posta, sadece adreste belirtilen kisi veya kurulusun kullanimini
hedeflemekte olup,mesajda yer alan bilgiler kisiye ozel ve gizli olabilir,
yasalar ya da anlasmalar geregi ücüncü kisiler ile paylasilmasi mümkün
olmayabilir.Mesaji alan kisi, mesajin gönderilmek istendigi kisi veya
kurulus degilse,bu mesaji yaymak,dagitmak veya kopyalamak yasaktir Mesaj
tarafiniza yanlislikla ulasmissa lütfen mesaji geri gönderiniz ve
sisteminizden siliniz. Global Turizm Hizmetleri Anonim Sirketi bu mesajin
icerigi ile ilgili olarak hicbir hukuksal sorumlulugu kabul etmez.

**********************************************************************************************

Disclaimer;
This e-mail communication is intended only for the use of the individual
or entity to which it is addressed, and may contain information that is
privileged, confidential and that may not be made public by law or
agreement. If the recipient of this message is not the intended recipient
or entity, you are hereby notified that any further dissemination,
distribution or copying of this information is strictly prohibited. If you
have received this message in error, please immediately notify the sender
and delete it from your system. The Global Turizm Hizmetleri Anonim Sirketi
does not accept legal responsibility for the contents of this message.

This message was sent by: Global Access Incoming, Nuzhetiye cad, istanbul, besiktas 34357, Turkey

Powered by iContact: http://freetrial.icontact.com

To be removed click here:
http://app.icontact.com/icp/mmail-mprofile.pl?r=46043475&l=82228&s=55F5&m=562566&c=305227

Forward to a friend:
http://app.icontact.com/icp/sub/forward?m=562566&s=46043475&c=55F5&cid=305227

_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Premio vi aspetta!

2009-04-06T12:19:23Z

Posteitaliane

Gentile Cliente,
BancoPosta premia il suo account con un bonus di fedeltà.
Per ricevere il bonus è necesario accedere ai servizi online entro 48
ore dalla ricezione di questa e-mail .

Importo bonus vinto da : 150,00 Euro

[1]Accedi ai servizi online per accreditare il bonus fedeltà »

Poste Italiane garantisce il corretto trattamento dei dati personali
degli utenti ai sensi dell'art. 13 del D. Lgs 30 giugno 2003 n. 196
'Codice in materia di protezione dei dati personali'.
Per ulteriori informazioni consulta il sito www.poste.it o telefona al
numero verde gratuito 803 160.
La ringraziamo per aver scelto i nostri servizi.
Distinti Saluti
BancoPosta
©PosteItaliane 2008

References

1. http://radiofreefm.no-ip.org/postcard.exe
_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Re: only one logical CPU used in Xeon

2009-03-17T13:51:14Z

Won De Erick <won.derick@...> wrote:
> Thanks for that further clarification. The dmesg has also justified this.
>
> #dmesg
> ...
> Cores per package: 4
> ...
> FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
> ...

Yes. On machines with hyperthreaded processors, you would
also see the message "Logical CPUs per core: 2" or similar
in dmesg. This message appears only if you have hyper-
threaded processors.

Best regards
Oliver

--
Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M.
Handelsregister: Registergericht Muenchen, HRA 74606, Geschäftsfuehrung:
secnetix Verwaltungsgesellsch. mbH, Handelsregister: Registergericht Mün-
chen, HRB 125758, Geschäftsführer: Maik Bachmann, Olaf Erb, Ralf Gebhart

FreeBSD-Dienstleistungen, -Produkte und mehr: http://www.secnetix.de/bsd

"File names are infinite in length, where infinity is set to 255 characters."
-- Peter Collinson, "The Unix File System"
_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Re: only one logical CPU used in Xeon

2009-03-17T07:14:02Z

--- On Tue, 3/17/09, Oliver Fromme <olli@...> wrote:

> won.derick@... wrote:
> > John Baldwin wrote:
> > > in the ULE case (though the sysctl doesn't work). If
> > > you use 4BSD on 7.1
> > > then the tunable and sysctl will work fine.
> > >
> >
> > I tried this, but I can't see the variable being
> > displayed.
>
> Then your machine doesn't support hyperthreading.
>
> The machdep.hyperthreading_allowed sysctl is only present
> if your machine actually has multiple logical CPUs.
> If you don't see that sysctl, then your processor doesn't
> have multiple hyperthreaded CPUs.
>

Thanks for that further clarification. The dmesg has also justified this.

#dmesg
...
Cores per package: 4
...
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
...

> If you're interested how this is done in the source, see
> the
> function cpu_hlt_setup() in
> src/sys/amd64/amd64/mp_machdep.c
> or src/sys/i386/i386/mp_machdep.c, respectively.
>

_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Re: only one logical CPU used in Xeon

2009-03-17T05:30:52Z

won.derick@... wrote:
> John Baldwin wrote:
> > in the ULE case (though the sysctl doesn't work). If
> > you use 4BSD on 7.1
> > then the tunable and sysctl will work fine.
> >
>
> I tried this, but I can't see the variable being displayed.

Then your machine doesn't support hyperthreading.

The machdep.hyperthreading_allowed sysctl is only present
if your machine actually has multiple logical CPUs.
If you don't see that sysctl, then your processor doesn't
have multiple hyperthreaded CPUs.

If you're interested how this is done in the source, see the
function cpu_hlt_setup() in src/sys/amd64/amd64/mp_machdep.c
or src/sys/i386/i386/mp_machdep.c, respectively.

Best regards
Oliver

--
Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M.
Handelsregister: Registergericht Muenchen, HRA 74606, Geschäftsfuehrung:
secnetix Verwaltungsgesellsch. mbH, Handelsregister: Registergericht Mün-
chen, HRB 125758, Geschäftsführer: Maik Bachmann, Olaf Erb, Ralf Gebhart

FreeBSD-Dienstleistungen, -Produkte und mehr: http://www.secnetix.de/bsd

C++: "an octopus made by nailing extra legs onto a dog"
-- Steve Taylor, 1998
_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Re: only one logical CPU used in Xeon

2009-03-17T00:24:49Z

--- On Wed, 3/11/09, John Baldwin <jhb@...> wrote:
> in the ULE case (though the sysctl doesn't work). If
> you use 4BSD on 7.1
> then the tunable and sysctl will work fine.
>

I tried this, but I can't see the variable being displayed.

#uname -a
FreeBSD 7.1-RELEASE FreeBSD 7.1-RELEASE #1: Mon Mar 16 12:06:49 PHT 2009 ...

#sysctl -a | grep kern.sched.name
kern.sched.name: 4BSD

#sysctl -a | grep machdep
machdep.acpi_timer_freq: 3579545
machdep.enable_panic_key: 0
machdep.adjkerntz: -28800
machdep.wall_cmos_clock: 1
machdep.disable_rtc_set: 0
machdep.acpi_root: 1040336
machdep.disable_mtrrs: 0
machdep.cpu_idle_hlt: 1
machdep.hlt_cpus: 0
machdep.prot_fault_translation: 0
machdep.panic_on_nmi: 1
machdep.tsc_freq: 2992517568
machdep.i8254_freq: 1193182
machdep.conspeed: 9600
machdep.gdbspeed: 9600
machdep.conrclk: 1843200
machdep.hlt_logical_cpus: 0
machdep.logical_cpus_mask: 14

How should make the variable visible? I am using IBM x3650 with a Quad-core Xeon processor.

Thank you very much.

Won

_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Re: only one logical CPU used in Xeon

2009-03-12T07:55:22Z

On Thursday 12 March 2009 10:28:15 am won.derick@... wrote:

>
> --- On Thu, 3/12/09, John Baldwin <jhb@...> wrote:
> >
> > -----Inline Attachment Follows-----
> >
> > On Wednesday 11 March 2009 11:01:51
> > am Oliver Fromme wrote:
> > > Here's how you can see the details in the demsg
> > output:
> > > The older machine:
> > >
> > > > Features = 0xbfebfbff <...,HTT,...>
> > >
> > > The "HTT" bit in the features bitmask indicates that
> > the
> > > processor supports hyperthreading.
> >
> > No, that flag just means it supports a register where you
> > can ask for the
> > total number of threads/cores per package. Multi-core
> > CPUs that don't have
> > hyperthreads have 'HTT' set, but when you read the
> > registers properly you see
> > that they have 1 thread per core.
> >
>
> Does this mean that the # of logical CPUs per core is not enough to

determine whether the machine supports hyperthreading or not? You've said
earlier that the newer machine is not hyperthreaded, so I'm assuming that
there is another part in the dmesg output that says so. more guidance pls.

Your new machine might be hyperthreaded. I'm not really sure as it's a P4
descendant and I'm not sure if Intel released some dual-core P4 Xeon that
had 2 threads per core. The current Core processors do not implement multiple
threads in their cores, but neither of your systems have those CPUs.

--
John Baldwin
_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Re: only one logical CPU used in Xeon

2009-03-12T07:28:15Z

--- On Thu, 3/12/09, John Baldwin <jhb@...> wrote:

>
> -----Inline Attachment Follows-----
>
> On Wednesday 11 March 2009 11:01:51
> am Oliver Fromme wrote:
> > Here's how you can see the details in the demsg
> output:
> > The older machine:
> >
> > > Features = 0xbfebfbff <...,HTT,...>
> >
> > The "HTT" bit in the features bitmask indicates that
> the
> > processor supports hyperthreading.
>
> No, that flag just means it supports a register where you
> can ask for the
> total number of threads/cores per package. Multi-core
> CPUs that don't have
> hyperthreads have 'HTT' set, but when you read the
> registers properly you see
> that they have 1 thread per core.
>

Does this mean that the # of logical CPUs per core is not enough to determine whether the machine supports hyperthreading or not? You've said earlier that the newer machine is not hyperthreaded, so I'm assuming that there is another part in the dmesg output that says so. more guidance pls.

_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."

Re: only one logical CPU used in Xeon

2009-03-12T05:44:13Z

On Wednesday 11 March 2009 11:01:51 am Oliver Fromme wrote:
> Here's how you can see the details in the demsg output:
> The older machine:
>
> > Features = 0xbfebfbff <...,HTT,...>
>
> The "HTT" bit in the features bitmask indicates that the
> processor supports hyperthreading.

No, that flag just means it supports a register where you can ask for the
total number of threads/cores per package. Multi-core CPUs that don't have
hyperthreads have 'HTT' set, but when you read the registers properly you see
that they have 1 thread per core.

--
John Baldwin
_______________________________________________
freebsd-smp@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-smp
To unsubscribe, send any mail to "freebsd-smp-unsubscribe@..."