On Wed, May 3, 2017 at 10:32 AM, Blair Bethwaite
<blair.bethwaite@xxxxxxxxx> wrote:
> On 3 May 2017 at 18:15, Dan van der Ster <dan@xxxxxxxxxxxxxx> wrote:
>> It looks like el7's tuned natively supports the pmqos interface in
>> plugins/plugin_cpu.py.
>
> Ahha, you are right, but I'm sure I tested tuned and it did not help.
> Thanks for pointing out this script, I had not noticed it before and I
> can see now why it isn't helping (on a RHEL7.3 host):
>
> /usr/lib/python2.7/site-packages/tuned/plugins/plugin_cpu.py:L13
> # TODO: force_latency -> command
> # intel_pstate
>
Seems to work for me, or?
# grep force_latency /usr/lib/tuned/latency-performance/tuned.conf
force_latency=1
# tuned-adm profile latency-performance
# cpupower monitor -m Idle_Stats | head
|Idle_Stats
PKG |CORE|CPU | POLL | C1-H | C1E- | C3-H | C6-H
0| 0| 0| 0.08| 95.12| 0.00| 0.00| 0.00
0| 0| 16| 0.00| 97.22| 0.00| 0.00| 0.00
0| 1| 1| 0.00| 95.78| 0.00| 0.00| 0.00
0| 1| 17| 0.00| 60.36| 0.00| 0.00| 0.00
0| 2| 2| 0.00| 91.60| 0.00| 0.00| 0.00
0| 2| 18| 0.00| 95.17| 0.00| 0.00| 0.00
0| 3| 3| 0.28| 87.05| 0.00| 0.00| 0.00
0| 3| 19| 0.00| 98.33| 0.00| 0.00| 0.00
# vi /usr/lib/tuned/latency-performance/tuned.conf
# grep force_latency /usr/lib/tuned/latency-performance/tuned.conf
force_latency=0
# tuned-adm profile latency-performance
# cpupower monitor -m Idle_Stats | head
|Idle_Stats
PKG |CORE|CPU | POLL | C1-H | C1E- | C3-H | C6-H
0| 0| 0| 96.76| 0.00| 0.00| 0.00| 0.00
0| 0| 16| 99.04| 0.00| 0.00| 0.00| 0.00
0| 1| 1| 97.65| 0.00| 0.00| 0.00| 0.00
0| 1| 17| 98.77| 0.00| 0.00| 0.00| 0.00
0| 2| 2| 97.97| 0.00| 0.00| 0.00| 0.00
0| 2| 18| 99.10| 0.00| 0.00| 0.00| 0.00
0| 3| 3| 92.27| 0.00| 0.00| 0.00| 0.00
0| 3| 19| 99.00| 0.00| 0.00| 0.00| 0.00
# rpm -q tuned
tuned-2.7.1-3.el7_3.1.noarch
-- Dan
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