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Date:   Sat, 9 May 2020 23:26:56 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     kajoljain <kjain@...ux.ibm.com>
Cc:     "Paul A. Clarke" <pc@...ibm.com>,
        linux-perf-users <linux-perf-users@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        ananth@...ux.vnet.ibm.com, maddy@...ux.vnet.ibm.com,
        naveen.n.rao@...ux.vnet.ibm.com, sukadev@...ux.ibm.com,
        mpe@...erman.id.au
Subject: Re: [PATCH 2/2] perf: Add missing metrics to POWER9 'cpi_breakdown'

On Fri, May 8, 2020 at 12:05 AM kajoljain <kjain@...ux.ibm.com> wrote:
> On 5/7/20 9:58 PM, Paul A. Clarke wrote:
> > From: "Paul A. Clarke" <pc@...ibm.com>
> >
> > Add the following metrics to the POWER9 'cpi_breakdown' metricgroup:
> > - ict_noslot_br_mpred_cpi
> > - ict_noslot_br_mpred_icmiss_cpi
> > - ict_noslot_cyc_other_cpi
> > - ict_noslot_disp_held_cpi
> > - ict_noslot_disp_held_hb_full_cpi
> > - ict_noslot_disp_held_issq_cpi
> > - ict_noslot_disp_held_other_cpi
> > - ict_noslot_disp_held_sync_cpi
> > - ict_noslot_disp_held_tbegin_cpi
> > - ict_noslot_ic_l2_cpi
> > - ict_noslot_ic_l3_cpi
> > - ict_noslot_ic_l3miss_cpi
> > - ict_noslot_ic_miss_cpi
> >
> > Signed-off-by: Paul A. Clarke <pc@...ibm.com>
>
> Reviewed-by: Kajol Jain <kjain@...ux.ibm.com>

Tested with:
https://lore.kernel.org/lkml/20200508053629.210324-3-irogers@google.com/
Tested-by: Ian Rogers <irogers@...gle.com>

Thanks,
Ian

> Thanks,
> Kajol Jain
> > ---
> >  .../arch/powerpc/power9/metrics.json          | 143 ++++++++++--------
> >  1 file changed, 78 insertions(+), 65 deletions(-)
> >
> > diff --git a/tools/perf/pmu-events/arch/powerpc/power9/metrics.json b/tools/perf/pmu-events/arch/powerpc/power9/metrics.json
> > index 811c2a8c1c9e..6169351a72c8 100644
> > --- a/tools/perf/pmu-events/arch/powerpc/power9/metrics.json
> > +++ b/tools/perf/pmu-events/arch/powerpc/power9/metrics.json
> > @@ -207,6 +207,84 @@
> >          "MetricGroup": "cpi_breakdown",
> >          "MetricName": "fxu_stall_cpi"
> >      },
> > +    {
> > +        "BriefDescription": "Ict empty for this thread due to branch mispred",
> > +        "MetricExpr": "PM_ICT_NOSLOT_BR_MPRED/PM_RUN_INST_CMPL",
> > +        "MetricGroup": "cpi_breakdown",
> > +        "MetricName": "ict_noslot_br_mpred_cpi"
> > +    },
> > +    {
> > +        "BriefDescription": "Ict empty for this thread due to Icache Miss and branch mispred",
> > +        "MetricExpr": "PM_ICT_NOSLOT_BR_MPRED_ICMISS/PM_RUN_INST_CMPL",
> > +        "MetricGroup": "cpi_breakdown",
> > +        "MetricName": "ict_noslot_br_mpred_icmiss_cpi"
> > +    },
> > +    {
> > +        "BriefDescription": "ICT other stalls",
> > +        "MetricExpr": "(PM_ICT_NOSLOT_CYC - PM_ICT_NOSLOT_IC_MISS - PM_ICT_NOSLOT_BR_MPRED_ICMISS - PM_ICT_NOSLOT_BR_MPRED - PM_ICT_NOSLOT_DISP_HELD)/PM_RUN_INST_CMPL",
> > +        "MetricGroup": "cpi_breakdown",
> > +        "MetricName": "ict_noslot_cyc_other_cpi"
> > +    },
> > +    {
> > +        "BriefDescription": "Cycles in which the NTC instruciton is held at dispatch for any reason",
> > +        "MetricExpr": "PM_ICT_NOSLOT_DISP_HELD/PM_RUN_INST_CMPL",
> > +        "MetricGroup": "cpi_breakdown",
> > +        "MetricName": "ict_noslot_disp_held_cpi"
> > +    },
> > +    {
> > +        "BriefDescription": "Ict empty for this thread due to dispatch holds because the History Buffer was full. Could be GPR/VSR/VMR/FPR/CR/XVF",
> > +        "MetricExpr": "PM_ICT_NOSLOT_DISP_HELD_HB_FULL/PM_RUN_INST_CMPL",
> > +        "MetricGroup": "cpi_breakdown",
> > +        "MetricName": "ict_noslot_disp_held_hb_full_cpi"
> > +    },
> > +    {
> > +        "BriefDescription": "Ict empty for this thread due to dispatch hold on this thread due to Issue q full, BRQ full, XVCF Full, Count cache, Link, Tar full",
> > +        "MetricExpr": "PM_ICT_NOSLOT_DISP_HELD_ISSQ/PM_RUN_INST_CMPL",
> > +        "MetricGroup": "cpi_breakdown",
> > +        "MetricName": "ict_noslot_disp_held_issq_cpi"
> > +    },
> > +    {
> > +        "BriefDescription": "ICT_NOSLOT_DISP_HELD_OTHER_CPI",
> > +        "MetricExpr": "(PM_ICT_NOSLOT_DISP_HELD - PM_ICT_NOSLOT_DISP_HELD_HB_FULL - PM_ICT_NOSLOT_DISP_HELD_SYNC - PM_ICT_NOSLOT_DISP_HELD_TBEGIN - PM_ICT_NOSLOT_DISP_HELD_ISSQ)/PM_RUN_INST_CMPL",
> > +        "MetricGroup": "cpi_breakdown",
> > +        "MetricName": "ict_noslot_disp_held_other_cpi"
> > +    },
> > +    {
> > +        "BriefDescription": "Dispatch held due to a synchronizing instruction at dispatch",
> > +        "MetricExpr": "PM_ICT_NOSLOT_DISP_HELD_SYNC/PM_RUN_INST_CMPL",
> > +        "MetricGroup": "cpi_breakdown",
> > +        "MetricName": "ict_noslot_disp_held_sync_cpi"
> > +    },
> > +    {
> > +        "BriefDescription": "the NTC instruction is being held at dispatch because it is a tbegin instruction and there is an older tbegin in the pipeline that must complete before the younger tbegin can dispatch",
> > +        "MetricExpr": "PM_ICT_NOSLOT_DISP_HELD_TBEGIN/PM_RUN_INST_CMPL",
> > +        "MetricGroup": "cpi_breakdown",
> > +        "MetricName": "ict_noslot_disp_held_tbegin_cpi"
> > +    },
> > +    {
> > +        "BriefDescription": "ICT_NOSLOT_IC_L2_CPI",
> > +        "MetricExpr": "(PM_ICT_NOSLOT_IC_MISS - PM_ICT_NOSLOT_IC_L3 - PM_ICT_NOSLOT_IC_L3MISS)/PM_RUN_INST_CMPL",
> > +        "MetricGroup": "cpi_breakdown",
> > +        "MetricName": "ict_noslot_ic_l2_cpi"
> > +    },
> > +    {
> > +        "BriefDescription": "Ict empty for this thread due to icache misses that were sourced from the local L3",
> > +        "MetricExpr": "PM_ICT_NOSLOT_IC_L3/PM_RUN_INST_CMPL",
> > +        "MetricGroup": "cpi_breakdown",
> > +        "MetricName": "ict_noslot_ic_l3_cpi"
> > +    },
> > +    {
> > +        "BriefDescription": "Ict empty for this thread due to icache misses that were sourced from beyond the local L3. The source could be local/remote/distant memory or another core's cache",
> > +        "MetricExpr": "PM_ICT_NOSLOT_IC_L3MISS/PM_RUN_INST_CMPL",
> > +        "MetricGroup": "cpi_breakdown",
> > +        "MetricName": "ict_noslot_ic_l3miss_cpi"
> > +    },
> > +    {
> > +        "BriefDescription": "Ict empty for this thread due to Icache Miss",
> > +        "MetricExpr": "PM_ICT_NOSLOT_IC_MISS/PM_RUN_INST_CMPL",
> > +        "MetricGroup": "cpi_breakdown",
> > +        "MetricName": "ict_noslot_ic_miss_cpi"
> > +    },
> >      {
> >          "MetricExpr": "(PM_NTC_ISSUE_HELD_DARQ_FULL + PM_NTC_ISSUE_HELD_ARB + PM_NTC_ISSUE_HELD_OTHER)/PM_RUN_INST_CMPL",
> >          "MetricGroup": "cpi_breakdown",
> > @@ -1819,71 +1897,6 @@
> >          "MetricExpr": "PM_FXU_IDLE / PM_CYC",
> >          "MetricName": "fxu_all_idle"
> >      },
> > -    {
> > -        "BriefDescription": "Ict empty for this thread due to branch mispred",
> > -        "MetricExpr": "PM_ICT_NOSLOT_BR_MPRED/PM_RUN_INST_CMPL",
> > -        "MetricName": "ict_noslot_br_mpred_cpi"
> > -    },
> > -    {
> > -        "BriefDescription": "Ict empty for this thread due to Icache Miss and branch mispred",
> > -        "MetricExpr": "PM_ICT_NOSLOT_BR_MPRED_ICMISS/PM_RUN_INST_CMPL",
> > -        "MetricName": "ict_noslot_br_mpred_icmiss_cpi"
> > -    },
> > -    {
> > -        "BriefDescription": "ICT other stalls",
> > -        "MetricExpr": "(PM_ICT_NOSLOT_CYC - PM_ICT_NOSLOT_IC_MISS - PM_ICT_NOSLOT_BR_MPRED_ICMISS - PM_ICT_NOSLOT_BR_MPRED - PM_ICT_NOSLOT_DISP_HELD)/PM_RUN_INST_CMPL",
> > -        "MetricName": "ict_noslot_cyc_other_cpi"
> > -    },
> > -    {
> > -        "BriefDescription": "Cycles in which the NTC instruciton is held at dispatch for any reason",
> > -        "MetricExpr": "PM_ICT_NOSLOT_DISP_HELD/PM_RUN_INST_CMPL",
> > -        "MetricName": "ict_noslot_disp_held_cpi"
> > -    },
> > -    {
> > -        "BriefDescription": "Ict empty for this thread due to dispatch holds because the History Buffer was full. Could be GPR/VSR/VMR/FPR/CR/XVF",
> > -        "MetricExpr": "PM_ICT_NOSLOT_DISP_HELD_HB_FULL/PM_RUN_INST_CMPL",
> > -        "MetricName": "ict_noslot_disp_held_hb_full_cpi"
> > -    },
> > -    {
> > -        "BriefDescription": "Ict empty for this thread due to dispatch hold on this thread due to Issue q full, BRQ full, XVCF Full, Count cache, Link, Tar full",
> > -        "MetricExpr": "PM_ICT_NOSLOT_DISP_HELD_ISSQ/PM_RUN_INST_CMPL",
> > -        "MetricName": "ict_noslot_disp_held_issq_cpi"
> > -    },
> > -    {
> > -        "BriefDescription": "ICT_NOSLOT_DISP_HELD_OTHER_CPI",
> > -        "MetricExpr": "(PM_ICT_NOSLOT_DISP_HELD - PM_ICT_NOSLOT_DISP_HELD_HB_FULL - PM_ICT_NOSLOT_DISP_HELD_SYNC - PM_ICT_NOSLOT_DISP_HELD_TBEGIN - PM_ICT_NOSLOT_DISP_HELD_ISSQ)/PM_RUN_INST_CMPL",
> > -        "MetricName": "ict_noslot_disp_held_other_cpi"
> > -    },
> > -    {
> > -        "BriefDescription": "Dispatch held due to a synchronizing instruction at dispatch",
> > -        "MetricExpr": "PM_ICT_NOSLOT_DISP_HELD_SYNC/PM_RUN_INST_CMPL",
> > -        "MetricName": "ict_noslot_disp_held_sync_cpi"
> > -    },
> > -    {
> > -        "BriefDescription": "the NTC instruction is being held at dispatch because it is a tbegin instruction and there is an older tbegin in the pipeline that must complete before the younger tbegin can dispatch",
> > -        "MetricExpr": "PM_ICT_NOSLOT_DISP_HELD_TBEGIN/PM_RUN_INST_CMPL",
> > -        "MetricName": "ict_noslot_disp_held_tbegin_cpi"
> > -    },
> > -    {
> > -        "BriefDescription": "ICT_NOSLOT_IC_L2_CPI",
> > -        "MetricExpr": "(PM_ICT_NOSLOT_IC_MISS - PM_ICT_NOSLOT_IC_L3 - PM_ICT_NOSLOT_IC_L3MISS)/PM_RUN_INST_CMPL",
> > -        "MetricName": "ict_noslot_ic_l2_cpi"
> > -    },
> > -    {
> > -        "BriefDescription": "Ict empty for this thread due to icache misses that were sourced from the local L3",
> > -        "MetricExpr": "PM_ICT_NOSLOT_IC_L3/PM_RUN_INST_CMPL",
> > -        "MetricName": "ict_noslot_ic_l3_cpi"
> > -    },
> > -    {
> > -        "BriefDescription": "Ict empty for this thread due to icache misses that were sourced from beyond the local L3. The source could be local/remote/distant memory or another core's cache",
> > -        "MetricExpr": "PM_ICT_NOSLOT_IC_L3MISS/PM_RUN_INST_CMPL",
> > -        "MetricName": "ict_noslot_ic_l3miss_cpi"
> > -    },
> > -    {
> > -        "BriefDescription": "Ict empty for this thread due to Icache Miss",
> > -        "MetricExpr": "PM_ICT_NOSLOT_IC_MISS/PM_RUN_INST_CMPL",
> > -        "MetricName": "ict_noslot_ic_miss_cpi"
> > -    },
> >      {
> >          "BriefDescription": "Rate of IERAT reloads from L2",
> >          "MetricExpr": "PM_IPTEG_FROM_L2 * 100 / PM_RUN_INST_CMPL",
> >

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