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From: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: "Peter Zijlstra" <peterz@infradead.org>,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	"Nick Piggin" <npiggin@kernel.dk>,
	"Mathieu Desnoyers" <mathieu.desnoyers@polymtl.ca>,
	"Américo Wang" <xiyou.wangcong@gmail.com>,
	"Eric Dumazet" <dada1@cosmosbay.com>,
	"Jan Beulich" <JBeulich@novell.com>,
	"Avi Kivity" <avi@redhat.com>,
	Xen-devel <xen-devel@lists.xensource.com>,
	"H. Peter Anvin" <hpa@zytor.com>,
	"Linux Virtualization"
	<virtualization@lists.linux-foundation.org>,
	"Jeremy Fitzhardinge" <jeremy.fitzhardinge@citrix.com>,
	suzuki@in.ibm.com
Subject: Re: [PATCH 13/14] x86/ticketlock: add slowpath logic
Date: Thu, 20 Jan 2011 09:58:12 +0530	[thread overview]
Message-ID: <20110120042811.GA17034@linux.vnet.ibm.com> (raw)
In-Reply-To: <4D37338E.8030509@goop.org>

On Wed, Jan 19, 2011 at 10:55:10AM -0800, Jeremy Fitzhardinge wrote:
> On 01/19/2011 10:39 AM, Srivatsa Vaddagiri wrote:
> > I have tested quite extensively with booting a 16-vcpu guest (on a 16-pcpu host)
> > and running kernel compine (with 32-threads). Without this patch, I had
> > difficulty booting/shutting-down successfully (it would hang mid-way).
> 
> Sounds good.  But I like to test with "make -j 100-200" to really give
> things a workout.

I reran the tests with the following configuration:

Host : 16pcpus, 32GB Memory
Single KVM guest w/ 32vcpus, 16GB memory

It survived a kernel compile with 200 threads once and another time with 300
threads. 'make allyesconfig' was run before compiling the kernel. So looks
quite stable to me ..additional testing from wider community will also help.

- vasa

  reply	other threads:[~2011-01-20  4:28 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-11-16 21:08 [PATCH 00/14] PV ticket locks without expanding spinlock Jeremy Fitzhardinge
2010-11-16 21:08 ` [PATCH 01/14] x86/ticketlock: clean up types and accessors Jeremy Fitzhardinge
2011-01-11 17:21   ` [Xen-devel] " Konrad Rzeszutek Wilk
2010-11-16 21:08 ` [PATCH 02/14] x86/ticketlock: convert spin loop to C Jeremy Fitzhardinge
2010-11-16 21:08 ` [PATCH 03/14] x86/ticketlock: Use C for __ticket_spin_unlock Jeremy Fitzhardinge
2010-11-16 21:08 ` [PATCH 04/14] x86/ticketlock: make large and small ticket versions of spin_lock the same Jeremy Fitzhardinge
2010-11-16 21:08 ` [PATCH 05/14] x86/ticketlock: make __ticket_spin_lock common Jeremy Fitzhardinge
2010-11-16 21:08 ` [PATCH 06/14] x86/ticketlock: make __ticket_spin_trylock common Jeremy Fitzhardinge
2010-11-16 21:08 ` [PATCH 07/14] x86/spinlocks: replace pv spinlocks with pv ticketlocks Jeremy Fitzhardinge
2010-11-16 21:08 ` [PATCH 08/14] x86/ticketlock: collapse a layer of functions Jeremy Fitzhardinge
2010-11-16 21:08 ` [PATCH 09/14] xen/pvticketlock: Xen implementation for PV ticket locks Jeremy Fitzhardinge
2010-11-17  8:11   ` Jan Beulich
2010-11-17  8:52     ` Jeremy Fitzhardinge
2010-11-17  9:57       ` [Xen-devel] " Jeremy Fitzhardinge
2010-11-17 10:34         ` Jan Beulich
2010-11-17 17:41           ` Jeremy Fitzhardinge
2010-11-16 21:08 ` [PATCH 10/14] x86/pvticketlock: use callee-save for lock_spinning Jeremy Fitzhardinge
2010-11-16 21:08 ` [PATCH 11/14] x86/ticketlock: don't inline _spin_unlock when using paravirt spinlocks Jeremy Fitzhardinge
2010-11-16 21:08 ` [PATCH 12/14] x86/ticketlocks: when paravirtualizing ticket locks, increment by 2 Jeremy Fitzhardinge
2010-11-16 21:08 ` [PATCH 13/14] x86/ticketlock: add slowpath logic Jeremy Fitzhardinge
2010-11-17  8:31   ` Jan Beulich
2010-11-17  8:52     ` Jeremy Fitzhardinge
2010-11-17  8:56       ` Jeremy Fitzhardinge
2010-11-17  9:08         ` Jeremy Fitzhardinge
2010-11-17  9:34           ` Jan Beulich
2010-11-17  8:58       ` Avi Kivity
2010-11-17  9:05         ` Jeremy Fitzhardinge
2010-11-17  9:10           ` Avi Kivity
2010-11-17 12:21   ` Peter Zijlstra
2010-11-17 15:25     ` [Xen-devel] " Jeremy Fitzhardinge
2011-01-17 15:22   ` Srivatsa Vaddagiri
2011-01-19 16:23     ` Srivatsa Vaddagiri
2011-01-24 21:56       ` Jeremy Fitzhardinge
2011-02-18 17:03         ` Srivatsa Vaddagiri
2011-01-19 18:31     ` Jeremy Fitzhardinge
2011-01-19 18:39       ` Srivatsa Vaddagiri
2011-01-19 18:55         ` Jeremy Fitzhardinge
2011-01-20  4:28           ` Srivatsa Vaddagiri [this message]
2011-01-20  9:52           ` Jan Beulich
2010-11-16 21:08 ` [PATCH 14/14] x86/ticketlocks: tidy up __ticket_unlock_kick() Jeremy Fitzhardinge
2010-11-17  8:56 ` [PATCH 00/14] PV ticket locks without expanding spinlock Avi Kivity
2011-01-19 16:44 ` Srivatsa Vaddagiri
2011-01-19 17:07   ` [PATCH 1/3] debugfs: Add support to print u32 array Srivatsa Vaddagiri
2011-01-19 17:12   ` [PATCH 2/3] kvm hypervisor : Add hypercalls to support pv-ticketlock Srivatsa Vaddagiri
2011-01-19 17:21     ` Peter Zijlstra
2011-01-19 18:29       ` Srivatsa Vaddagiri
2011-01-19 18:53       ` Jeremy Fitzhardinge
2011-01-20 11:42         ` Srivatsa Vaddagiri
2011-01-20 17:49           ` Jeremy Fitzhardinge
2011-01-20 11:59         ` Srivatsa Vaddagiri
2011-01-20 13:41           ` Peter Zijlstra
2011-01-20 14:34             ` Srivatsa Vaddagiri
2011-01-20 17:56           ` Jeremy Fitzhardinge
2011-01-21 14:02             ` Srivatsa Vaddagiri
2011-01-21 14:48               ` Rik van Riel
2011-01-22  6:14                 ` Srivatsa Vaddagiri
2011-01-22 14:53                   ` Rik van Riel
2011-01-24 17:49                     ` Jeremy Fitzhardinge
2011-01-19 17:23     ` Srivatsa Vaddagiri
2011-01-19 17:50       ` Peter Zijlstra
2011-01-19 17:17   ` [PATCH 3/3] kvm guest : Add support for pv-ticketlocks Srivatsa Vaddagiri

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