RE: constant_tsc and TSC unstable

2007-12-05 Thread Pallipadi, Venkatesh
>-Original Message- >From: [EMAIL PROTECTED] >[mailto:[EMAIL PROTECTED] On Behalf Of Paul >Rolland (???・???) >Sent: Thursday, November 29, 2007 10:53 PM >To: Pallipadi, Venkatesh >Cc: Linux Kernel; Siddha, Suresh B; [EMAIL PROTECTED] >Subject: Re: const

Re: constant_tsc and TSC unstable

2007-11-29 Thread H. Peter Anvin
Paul Rolland (ポール・ロラン) wrote: Note that once TSC is disabled (it's using "jiffies" as far as I can see), ntpd constantly speeds up and slows down the clock, it jumps +/- 0.5sec every several minutes or hours - I guess that's when ntpd process gets moved from one core to another for whatever rea

Re: constant_tsc and TSC unstable

2007-11-29 Thread ポール・ ロラン
Hello, On Fri, 30 Nov 2007 00:26:47 +0300 Michael Tokarev <[EMAIL PROTECTED]> wrote: > H. Peter Anvin wrote: > > Paul Rolland (ポール・ロラン) wrote: > [] > >> Measured 3978592228 cycles TSC warp between CPUs, turning off TSC clock. > >> Marking TSC unstable due to: check_tsc_sync_source failed. > [] >

Re: constant_tsc and TSC unstable

2007-11-29 Thread Paul Rolland (ポール・ロラン)
Hello, On Thu, 29 Nov 2007 15:29:49 -0800 "Pallipadi, Venkatesh" <[EMAIL PROTECTED]> wrote: > TSCs on Core 2 Duo are supposed to be in sync unless CPU supports deep idle > states like C2, C3. Can you send the full /proc/cpuinfo and full dmesg. > Sure I can... [EMAIL PROTECTED] log]# cat /proc/

Re: constant_tsc and TSC unstable

2007-11-29 Thread Frans Pop
Paul Rolland wrote: > Total of 2 processors activated (6919.15 BogoMIPS). > ENABLING IO-APIC IRQs > ..TIMER: vector=0x31 apic1=0 pin1=2 apic2=-1 pin2=-1 > checking TSC synchronization [CPU#0 -> CPU#1]: > Measured 3978592228 cycles TSC warp between CPUs, turning off TSC clock. > Marking TSC unstable

RE: constant_tsc and TSC unstable

2007-11-29 Thread Pallipadi, Venkatesh
>-Original Message- >From: [EMAIL PROTECTED] >[mailto:[EMAIL PROTECTED] On Behalf Of Paul >Rolland (???・???) >Sent: Thursday, November 29, 2007 8:12 AM >To: Linux Kernel >Cc: [EMAIL PROTECTED] >Subject: constant_tsc and TSC unstable > >Hello, > >I've a machine with a Core2Duo CPU. /pro

Re: constant_tsc and TSC unstable

2007-11-29 Thread Patrick McHardy
H. Peter Anvin wrote: Paul Rolland (ポール・ロラン) wrote: Hello, I've a machine with a Core2Duo CPU. /proc/cpuinfo reports the flag constant_tsc, but at boot time, I have the log : ... Total of 2 processors activated (6919.15 BogoMIPS). ENABLING IO-APIC IRQs ..TIMER: vector=0x31 apic1=0 pin1=2 apic2

Re: constant_tsc and TSC unstable

2007-11-29 Thread Michael Tokarev
H. Peter Anvin wrote: > Paul Rolland (ポール・ロラン) wrote: [] >> Measured 3978592228 cycles TSC warp between CPUs, turning off TSC clock. >> Marking TSC unstable due to: check_tsc_sync_source failed. [] >> but I was wondering if this is a bug or a feature ;) > The problem you're having is that the TSCs

Re: constant_tsc and TSC unstable

2007-11-29 Thread H. Peter Anvin
Paul Rolland (ポール・ロラン) wrote: Hello, I've a machine with a Core2Duo CPU. /proc/cpuinfo reports the flag constant_tsc, but at boot time, I have the log : ... Total of 2 processors activated (6919.15 BogoMIPS). ENABLING IO-APIC IRQs ..TIMER: vector=0x31 apic1=0 pin1=2 apic2=-1 pin2=-1 checking TS