From: Jack Steiner <steiner@sgi.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [PATCH] - Fix get_model_name() for mixed cpu type systems
Date: Fri, 20 Oct 2006 02:03:32 +0000 [thread overview]
Message-ID: <20061020020332.GB19263@sgi.com> (raw)
In-Reply-To: <20061018212559.GA2965@sgi.com>
>
> While I was testing cpu-hotplug (2.6.18-git tree), mistakenly I hot-plugged
> different-frequency-cpu.
> Booted with : Itanium2 1.6GHz
> Hot-added : Itanium2 1.5GHz
>
> What happend was ...hrtimer delayed.
> timers based on jiffies (ex. select()) worked well but timer based on hrtimer
> can't work. For example, sleep(1) sleeps very long..
>
> Mixed-cpu system works well in other environment ?
FWIW, one of our primary test systems has:
CPU GEOID FAMILY MOD REV ARCH CPUFREQ ITCFREQ FSBFREQ L3-MB CORE THD NODE NASID SHUB PROM
0 001c05#0a Itanium2 1 5 0 1300 1300 400 3 0 0 0 0 1.2 4.70
1 001c05#0c Itanium2 1 5 0 1300 1300 400 3 0 0 0 0 1.2 4.70
2 001c05#1a Itanium2 1 5 0 1300 1300 400 3 0 0 1 2 1.2 4.70
...
21 001c34#0c Itanium2 1 5 0 1300 1300 325 3 0 0 14 28 1.1 4.70
22 001c34#1a Itanium2 1 5 0 1300 1300 325 3 0 0 15 30 1.1 4.70
23 001c34#1c Itanium2 1 5 0 1300 1300 400 3 0 0 15 30 1.1 4.70
24 002c11#0a Itanium2 2 2 0 1600 1600 400 6 0 0 16 32 1.2 4.70
25 002c11#0c Itanium2 2 2 0 1600 1600 400 6 0 0 16 32 1.2 4.70
26 002c11#1a Itanium2 2 2 0 1600 1600 426 6 0 0 17 34 1.2 4.70
...
31 002c14#1c Itanium2 2 2 0 1600 1600 426 6 0 0 19 38 1.2 4.70
32 002c17#0a Itanium2 2 2 0 1500 1500 400 4 0 0 20 40 1.2 4.70
33 002c17#0c Itanium2 2 2 0 1500 1500 400 4 0 0 20 40 1.2 4.70
34 002c17#1a Itanium2 2 2 0 1500 1500 461 4 0 0 21 42 1.2 4.70
35 002c17#1c Itanium2 2 2 0 1500 1500 666 4 0 0 21 42 1.2 4.70
36 002c27#0a Itanium2 2 2 0 1500 1500 666 4 0 0 22 44 1.2 4.70
...
40 003c11#0a Itanium2 0 7 0 900 900 400 1 0 0 24 48 1.1 4.70
41 003c11#0c Itanium2 0 7 0 900 900 400 1 0 0 24 48 1.1 4.70
42 003c11#1a Itanium2 0 7 0 900 900 400 1 0 0 25 50 1.1 4.70
I've never noticed a problem with normal operation. I have NOT tried hot-add.
-- jack
next prev parent reply other threads:[~2006-10-20 2:03 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-18 21:25 [PATCH] - Fix get_model_name() for mixed cpu type systems Jack Steiner
2006-10-18 21:44 ` Stephane Eranian
2006-10-18 21:55 ` Jack Steiner
2006-10-18 22:25 ` Stephane Eranian
2006-10-18 22:38 ` Russ Anderson
2006-10-18 22:57 ` Stephane Eranian
2006-10-19 0:03 ` Luck, Tony
2006-10-19 14:08 ` Jack Steiner
2006-10-19 20:57 ` Russ Anderson
2006-10-19 21:05 ` Stephane Eranian
2006-10-19 21:21 ` Matthew Wilcox
2006-10-19 21:22 ` Luck, Tony
2006-10-19 21:29 ` Jack Steiner
2006-10-19 21:52 ` Stephane Eranian
2006-10-19 22:11 ` Stephane Eranian
2006-10-20 1:54 ` KAMEZAWA Hiroyuki
2006-10-20 2:03 ` Jack Steiner [this message]
2007-03-12 13:07 ` FW: " Jack Steiner
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