From: "H. Peter Anvin" <hpa@zytor.com>
To: Valdis.Kletnieks@vt.edu
Cc: Avi Kivity <avi@redhat.com>, Andi Kleen <andi@firstfloor.org>,
Gleb Natapov <gleb@redhat.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org, mingo@elte.hu,
npiggin@suse.de, tglx@linutronix.de, mtosatti@redhat.com
Subject: Re: [PATCH] use unfair spinlock when running on hypervisor.
Date: Wed, 02 Jun 2010 00:39:56 -0700 [thread overview]
Message-ID: <4C060ACC.7080103@zytor.com> (raw)
In-Reply-To: <10707.1275413954@localhost>
On 06/01/2010 10:39 AM, Valdis.Kletnieks@vt.edu wrote:
> On Tue, 01 Jun 2010 19:52:28 +0300, Avi Kivity said:
>> On 06/01/2010 07:38 PM, Andi Kleen wrote:
>>>>> Your new code would starve again, right?
>>> Try it on a NUMA system with unfair memory.
>
>> We are running everything on NUMA (since all modern machines are now
>> NUMA). At what scale do the issues become observable?
>
> My 6-month-old laptop is NUMA? Comes as a surprise to me, and to the
> perfectly-running NUMA=n kernel I'm running.
>
> Or did you mean a less broad phrase than "all modern machines"?
>
All modern multisocket machines, unless configured in interleaved memory
mode.
-hpa
next prev parent reply other threads:[~2010-06-02 7:40 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-01 9:35 [PATCH] use unfair spinlock when running on hypervisor Gleb Natapov
2010-06-01 15:53 ` Andi Kleen
2010-06-01 16:24 ` Gleb Natapov
2010-06-01 16:38 ` Andi Kleen
2010-06-01 16:52 ` Avi Kivity
2010-06-01 17:27 ` Andi Kleen
2010-06-02 2:51 ` Avi Kivity
2010-06-02 5:26 ` Srivatsa Vaddagiri
2010-06-02 8:50 ` Andi Kleen
2010-06-02 9:00 ` Avi Kivity
2010-06-03 4:20 ` Srivatsa Vaddagiri
2010-06-03 4:51 ` Eric Dumazet
2010-06-03 5:38 ` Srivatsa Vaddagiri
2010-06-03 8:52 ` Andi Kleen
2010-06-03 9:26 ` Srivatsa Vaddagiri
2010-06-03 10:22 ` Nick Piggin
2010-06-03 10:38 ` Nick Piggin
2010-06-03 12:04 ` Srivatsa Vaddagiri
2010-06-03 12:38 ` Nick Piggin
2010-06-03 12:58 ` Srivatsa Vaddagiri
2010-06-03 13:04 ` Srivatsa Vaddagiri
2010-06-03 13:45 ` Nick Piggin
2010-06-03 14:48 ` Srivatsa Vaddagiri
2010-06-03 15:17 ` Andi Kleen
2010-06-03 15:35 ` Nick Piggin
2010-06-03 17:25 ` Andi Kleen
2010-06-01 17:39 ` Valdis.Kletnieks
2010-06-02 2:46 ` Avi Kivity
2010-06-02 7:39 ` H. Peter Anvin [this message]
2010-06-01 17:54 ` john cooper
2010-06-01 19:36 ` Andi Kleen
2010-06-03 11:06 ` David Woodhouse
2010-06-03 15:15 ` Andi Kleen
2010-06-01 21:39 ` Eric Dumazet
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