On 01/14/2010 04:34 PM, Lucas Meneghel Rodrigues wrote:
On Thu, 2010-01-14 at 15:11 +0200, Avi Kivity wrote:
Strangely, autotest only caught this on AMD and even it took a while.
Lucas, can you integrate something like the following into autotest,
so we exercise the preemption code harder?
All right Avi, just added it to our TODO list, thanks!
On second thoughts, this will cause a severe performance loss (which may
also affect test results), due to cpu overcommit and excessive vcpu
migrations.
How about, instead:
Launch a background process with nthreads == ncpus, bind each thread to
a cpu, and execute a loop on each thread that sleeps for a random amount
of time from 1 to 10 milliseconds. This will exercise the preemption code.
In addition, every second or so, offline and online a random cpu. This
will cause tasks to be migrated and exercise the task migration code.
--
error compiling committee.c: too many arguments to function
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