RE: [PATCH v2] cpuidle: poll_state: Add time limit to poll_idle()

Doug Smythies
2018-03-22T19:11:42Z

On 2018.03.22 09:32 Rik van Riel wrote:
> On Wed, 2018-03-14 at 13:04 +0100, Peter Zijlstra wrote:
>
>> On x86 we don't have to use that time_check_counter thing,
>> sched_clock()
>> is really cheap, not sure if it makes sense on other platforms.
>
> Are you sure? I saw a 5-10% increase in CPU use,
> for a constant query rate to a memcache style
> workload, with v3 of this patch.

I would very much like to be able to repeat your test results.
However, I am not sure what you mean by "memcache style workload".
Is there a test you can point me to? Say a Phoronix type test, for example.

All of my tests with the V3 of this patch have been fine.

... Doug