Thread (19 messages) 19 messages, 4 authors, 2022-02-18

Re: [REGRESSION] 5-10% increase in IO latencies with nohz balance patch

From: Josef Bacik <josef@toxicpanda.com>
Date: 2021-11-29 22:40:44
Also in: lkml

On Mon, Nov 29, 2021 at 06:31:17PM +0000, Valentin Schneider wrote:
On 29/11/21 13:15, Josef Bacik wrote:
quoted
On Mon, Nov 29, 2021 at 06:03:24PM +0000, Valentin Schneider wrote:
quoted
Would you happen to have execution traces by any chance? If not I should be
able to get one out of that fsperf thingie.
I don't, if you want to tell me how I can do it right now.  I've disabled
everything on this box for now so it's literally just sitting there waiting to
have things done to it.  Thanks,
I see you have Ftrace enabled in your config, so that ought to do it:

  trace-cmd record -e 'sched:*' -e 'cpu_idle' $your_test_cmd
http://toxicpanda.com/performance/trace.dat

it's like 16mib.  Enjoy,

Josef
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