[Xen-devel] Re: [PATCH 13/14] x86/ticketlock: add slowpath logic

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

>>> On 19.01.11 at 19:55, Jeremy Fitzhardinge <jeremy@xxxxxxxx> 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.

Hmm, in my experience, heavily over-committing CPUs (e.g. a
domain with double or more the vCPU-s that the system has
pCPU-s, or the pCPU-s the domain is allowed to run on) is a
much better test for eventual problems in the spin lock code
paths.

Jan


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