From: David Vrabel <david.vrabel@citrix.com>
To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: <linux-kernel@vger.kernel.org>, <xen-devel@lists.xenproject.org>,
<boris.ostrovsky@oracle.com>, <david.vrabel@citrix.com>,
<stefan.bader@canonical.com>, <stefano.stabellini@eu.citrix.com>,
<jeremy@goop.org>
Subject: Re: [Xen-devel] [PATCH] Bug-fixes to enable PV ticketlock to work under Xen PVHVM with Linux v3.12. (v2)
Date: Mon, 9 Sep 2013 16:33:48 +0100 [thread overview]
Message-ID: <522DEA5C.6070608@citrix.com> (raw)
In-Reply-To: <1378739496-17468-1-git-send-email-konrad.wilk@oracle.com>
On 09/09/13 16:11, Konrad Rzeszutek Wilk wrote:
>
> I had run some light performance tests with two guests - each over subscribed by
> 2:1 and running a spinlock_hog wherein each CPU tries to get a lock. The machine
> is a 4 CPU Intel, and each guest is running with 8 VCPUs.
>
> It is not a perfect test-case - for that I have asked our internal performance
> engineer to test it out with various workloads and guests.
>
> However it does demonstrate that these patches do work and they do not
> incur any performance regressions (and yes, they do show a performance
> improvement).
Good enough for me, let's get these into 3.12.
David
prev parent reply other threads:[~2013-09-09 15:33 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-09 15:11 [PATCH] Bug-fixes to enable PV ticketlock to work under Xen PVHVM with Linux v3.12. (v2) Konrad Rzeszutek Wilk
2013-09-09 15:11 ` [PATCH 1/5] xen/spinlock: Fix locking path engaging too soon under PVHVM Konrad Rzeszutek Wilk
2013-09-09 15:11 ` Konrad Rzeszutek Wilk
2013-09-09 15:11 ` [PATCH 2/5] xen/spinlock: We don't need the old structure anymore Konrad Rzeszutek Wilk
2013-09-09 15:11 ` Konrad Rzeszutek Wilk
2013-09-09 15:11 ` [PATCH 3/5] xen/smp: Update pv_lock_ops functions before alternative code starts under PVHVM Konrad Rzeszutek Wilk
2013-09-09 15:11 ` Konrad Rzeszutek Wilk
2013-09-09 15:11 ` [PATCH 4/5] xen/spinlock: Don't setup xen spinlock IPI kicker if disabled Konrad Rzeszutek Wilk
2013-09-09 15:11 ` Konrad Rzeszutek Wilk
2013-09-09 15:11 ` [PATCH 5/5] Revert "xen/spinlock: Disable IRQ spinlock (PV) allocation on PVHVM" Konrad Rzeszutek Wilk
2013-09-09 15:11 ` Konrad Rzeszutek Wilk
2013-09-09 15:33 ` [PATCH] Bug-fixes to enable PV ticketlock to work under Xen PVHVM with Linux v3.12. (v2) David Vrabel
2013-09-09 15:33 ` David Vrabel [this message]
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