On Wed, Apr 1, 2015 at 10:39 AM, Reindl Harald <[email protected]> wrote:
> > > Am 01.04.2015 um 19:36 schrieb Dave Johansen: > >> On Wed, Apr 1, 2015 at 1:32 AM, Reindl Harald wrote: >> >> Am 01.04.2015 um 06:53 schrieb Dave Johansen: >> >> I added the call to mlockall() (it did have to be run as root) >> on a F21 >> machine with no swap and the slow down was still visible in the >> "CPU >> bound task" >> >> surely, as expected >> >> http://serverfault.com/questions/12679/can-anyone- >> explain-precisely-what-iowait-is >> >> I don't get how that is expected. The "CPU bound task" is now basically >> guaranteed to not be doing anything that requires disk access, so the >> iowait should be 0 for the "CPU bound task" >> > > the purpose of mlockall() was not to solve the problem, it's intention is > only to reduce side-effects in the test scenario > Ok, that makes sense. I was just confused about the link to iowait and assumed you were implying that it was expected that the "CPU bound task" be impacted by iowait.
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