linux-kernel - Re: [PATCH v4 0/8] powerpc/perf: Add json file metric support for the hv

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Date:   Tue, 10 Mar 2020 19:31:38 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
Cc:     Kajol Jain <kjain@...ux.ibm.com>, linuxppc-dev@...ts.ozlabs.org,
        mpe@...erman.id.au, sukadev@...ux.vnet.ibm.com,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        anju@...ux.vnet.ibm.com, maddy@...ux.vnet.ibm.com,
        ravi.bangoria@...ux.ibm.com, peterz@...radead.org,
        yao.jin@...ux.intel.com, ak@...ux.intel.com, jolsa@...nel.org,
        kan.liang@...ux.intel.com, jmario@...hat.com,
        alexander.shishkin@...ux.intel.com, mingo@...nel.org,
        paulus@...abs.org, namhyung@...nel.org, mpetlan@...hat.com,
        gregkh@...uxfoundation.org, benh@...nel.crashing.org,
        mamatha4@...ux.vnet.ibm.com, mark.rutland@....com,
        tglx@...utronix.de
Subject: Re: [PATCH v4 0/8] powerpc/perf: Add json file metric support for
 the hv_24x7 socket/chip level events

On Tue, Mar 10, 2020 at 03:18:36PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Mon, Mar 09, 2020 at 10:35:06AM +0100, Jiri Olsa escreveu:
> > On Mon, Mar 09, 2020 at 11:55:44AM +0530, Kajol Jain wrote:
> > > First patch of the patchset fix inconsistent results we are getting when
> > > we run multiple 24x7 events.
> > > 
> > > Patchset adds json file metric support for the hv_24x7 socket/chip level
> > > events. "hv_24x7" pmu interface events needs system dependent parameter
> > > like socket/chip/core. For example, hv_24x7 chip level events needs
> > > specific chip-id to which the data is requested should be added as part
> > > of pmu events.
> > > 
> > > So to enable JSON file support to "hv_24x7" interface, patchset expose
> > > total number of sockets and chips per-socket details in sysfs
> > > files (sockets, chips) under "/sys/devices/hv_24x7/interface/".
> > > 
> > > To get sockets and number of chips per sockets, patchset adds a rtas call
> > > with token "PROCESSOR_MODULE_INFO" to get these details. Patchset also
> > > handles partition migration case to re-init these system depended
> > > parameters by adding proper calls in post_mobility_fixup() (mobility.c).
> > > 
> > > Patch 6 & 8 of the patchset handles perf tool plumbing needed to replace
> > > the "?" character in the metric expression to proper value and hv_24x7
> > > json metric file for different Socket/chip resources.
> > > 
> > > Patch set also enable Hz/hz prinitg for --metric-only option to print
> > > metric data for bus frequency.
> > > 
> > > Applied and tested all these patches cleanly on top of jiri's flex changes
> > > with the changes done by Kan Liang for "Support metric group constraint"
> > > patchset and made required changes.
> > > 
> > > Changelog:
> > > v3 -> v4
> > > - Made changes suggested by jiri.
> > 
> > could you please mention them next time? ;-)
> > 
> > > - Apply these patch on top of Kan liang changes.
> > 
> > Arnaldo, could you please pull the expr flex changes and Kan's
> > metric group constraint changes? it's both prereq of this patchset
> 
> Both are now in my perf/core branch, will go upstream soon, should I go
> and pickup the perf tooling bits in this patchkit?

Kajol mentioned there are still some issues with the
global variable, I plan to check on it this week

thanks,
jirka