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From: Mike Galbraith <umgwanakikbuti@gmail.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
	Ingo Molnar <mingo@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
	Eric Dumazet <edumazet@google.com>,
	Frederic Weisbecker <fweisbec@gmail.com>,
	Chris Mason <clm@fb.com>, Arjan van de Ven <arjan@infradead.org>,
	rt@linutronix.de, Rik van Riel <riel@redhat.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	George Spelvin <linux@sciencehorizons.net>,
	Len Brown <lenb@kernel.org>,
	ltp@lists.linux.it
Subject: Re: [patch V2 00/20] timer: Refactor the timer wheel
Date: Wed, 22 Jun 2016 15:37:47 +0200	[thread overview]
Message-ID: <1466602667.3188.63.camel@gmail.com> (raw)
In-Reply-To: <1466586367.3188.45.camel@gmail.com>

On Wed, 2016-06-22 at 11:06 +0200, Mike Galbraith wrote:
> On Wed, 2016-06-22 at 10:44 +0200, Thomas Gleixner wrote:
> > B1;2802;0cOn Wed, 22 Jun 2016, Mike Galbraith wrote:
> > > FWIW, testing with ltp, I noticed a new failure in logs.  It turns
> > out
> > > to be intermittent, but the testcase mostly fails.
> > 
> > You forgot to cc the LTP folks ...
> 
> This ain't the only one, it's just new.  I'll mention it.
>  
> File under FYI/FWIW: I also plugged the set into RT, and nothing fell
> out of local boxen.  The below is falling out of my 8 socket box
> though.. maybe a portage booboo.
> 
> [ 1503.988863] clocksource: timekeeping watchdog on CPU42: Marking clocksource 'tsc' as unstable because the skew is too large:
> [ 1504.203800] clocksource:                       'hpet' wd_now: 38b55bb wd_last: 8303f269 mask: ffffffff
> [ 1504.296111] clocksource:                       'tsc' cs_now: 3a3aa717794 cs_last: 354624eea7b mask: ffffffffffffffff
> [ 1504.402329] clocksource: Switched to clocksource hpet

Nope, not RT portage booboo.  Virgin x86-tip/WIP.timers..

vogelweide:~/:[130]# dmesg|grep clocksource:
[    0.000000] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1910969940391419 ns
[    0.000000] clocksource: hpet: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 133484882848 ns
[    5.608205] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275000 ns
[    9.151208] clocksource: Switched to clocksource hpet
[    9.485907] clocksource: acpi_pm: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 2085701024 ns
[   11.947226] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x20974986637, max_idle_ns: 440795286310 ns
[   13.012145] clocksource: Switched to clocksource tsc
[  434.868215] clocksource: timekeeping watchdog on CPU59: Marking clocksource 'tsc' as unstable because the skew is too large:
[  434.982251] clocksource:                       'hpet' wd_now: 732cdf37 wd_last: df3d99d8 mask: ffffffff
[  435.085875] clocksource:                       'tsc' cs_now: 16e6780d1eb cs_last: 11326fa576e mask: ffffffffffffffff
[  435.211249] clocksource: Switched to clocksource hpet
vogelweide:~/:[0]#

  reply	other threads:[~2016-06-22 13:37 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-17 13:26 [patch V2 00/20] timer: Refactor the timer wheel Thomas Gleixner
2016-06-17 13:26 ` [patch V2 01/20] timer: Make pinned a timer property Thomas Gleixner
2016-06-17 13:26 ` [patch V2 02/20] x86/apic/uv: Initialize timer as pinned Thomas Gleixner
2016-06-17 13:26 ` [patch V2 03/20] x86/mce: " Thomas Gleixner
2016-06-17 13:26 ` [patch V2 05/20] driver/net/ethernet/tile: " Thomas Gleixner
2016-06-21 18:14   ` Peter Zijlstra
2016-06-17 13:26 ` [patch V2 04/20] cpufreq/powernv: " Thomas Gleixner
2016-06-17 13:26 ` [patch V2 06/20] drivers/tty/metag_da: " Thomas Gleixner
2016-06-17 13:26 ` [patch V2 07/20] drivers/tty/mips_ejtag: " Thomas Gleixner
2016-06-17 13:26 ` [patch V2 08/20] net/ipv4/inet: Initialize timers " Thomas Gleixner
2016-06-17 13:26 ` [patch V2 09/20] timer: Remove mod_timer_pinned Thomas Gleixner
2016-06-17 13:26 ` [patch V2 10/20] hlist: Add hlist_is_singular_node() helper Thomas Gleixner
2016-06-17 13:26 ` [patch V2 11/20] timer: Give a few structs and members proper names Thomas Gleixner
2016-06-17 13:26 ` [patch V2 12/20] timer: Switch to a non cascading wheel Thomas Gleixner
2016-06-18  9:55   ` George Spelvin
2016-06-24 10:06     ` Thomas Gleixner
2016-06-17 13:26 ` [patch V2 13/20] timer: Remove slack leftovers Thomas Gleixner
2016-06-17 13:26 ` [patch V2 14/20] timer: Move __run_timers() function Thomas Gleixner
2016-06-17 13:26 ` [patch V2 15/20] timer: Optimize collect timers for NOHZ Thomas Gleixner
2016-06-17 13:26 ` [patch V2 16/20] tick/sched: Remove pointless empty function Thomas Gleixner
2016-06-17 13:26 ` [patch V2 17/20] timer: Forward wheel clock whenever possible Thomas Gleixner
2016-06-17 13:26 ` [patch V2 18/20] timer: Only wake softirq if necessary Thomas Gleixner
2016-06-17 13:26 ` [patch V2 19/20] timer: Split out index calculation Thomas Gleixner
2016-06-17 13:26 ` [patch V2 20/20] timer: Optimization for same expiry time in mod_timer() Thomas Gleixner
2016-06-17 13:48 ` [patch V2 00/20] timer: Refactor the timer wheel Eric Dumazet
2016-06-17 13:57   ` Thomas Gleixner
2016-06-17 14:25     ` Eric Dumazet
2016-06-20 13:56       ` Thomas Gleixner
2016-06-20 14:46         ` Arjan van de Ven
2016-06-20 14:46           ` Thomas Gleixner
2016-06-20 14:49             ` Arjan van de Ven
2016-06-20 19:03         ` Rik van Riel
2016-06-21  2:48           ` Eric Dumazet
2016-06-17 14:26 ` Arjan van de Ven
2016-06-20 15:05 ` Paul E. McKenney
2016-06-20 15:13   ` Thomas Gleixner
2016-06-20 15:41     ` Paul E. McKenney
2016-06-22  7:37 ` Mike Galbraith
2016-06-22  8:44   ` Thomas Gleixner
2016-06-22  9:06     ` Mike Galbraith
2016-06-22 13:37       ` Mike Galbraith [this message]
2016-06-22 10:28     ` [LTP] " Cyril Hrubis
2016-06-23  8:27       ` Thomas Gleixner
2016-06-23 11:47         ` Cyril Hrubis
2016-06-23 13:58           ` George Spelvin
2016-06-23 14:10             ` Thomas Gleixner
2016-06-23 15:11             ` Cyril Hrubis
2016-06-23 15:21               ` Thomas Gleixner
2016-06-23 16:31                 ` Cyril Hrubis
2016-06-26 19:00     ` Pavel Machek
2016-06-26 19:21       ` Arjan van de Ven
2016-06-26 20:02         ` Pavel Machek

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