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Subject: Re: [PATCH 2/2] perf: Add missing metrics to POWER9 'cpi_breakdown'
To:     "Paul A. Clarke" <pc@us.ibm.com>, linux-perf-users@vger.kernel.org
Cc:     linux-kernel@vger.kernel.org, acme@kernel.org,
        ananth@linux.vnet.ibm.com, maddy@linux.vnet.ibm.com,
        naveen.n.rao@linux.vnet.ibm.com, sukadev@linux.ibm.com,
        mpe@ellerman.id.au, irogers@google.com
References: <1588868938-21933-1-git-send-email-pc@us.ibm.com>
 <1588868938-21933-3-git-send-email-pc@us.ibm.com>
From:   kajoljain <kjain@linux.ibm.com>
Message-ID: <0b276c65-9c54-c6eb-0381-f56c4ccf5ec2@linux.ibm.com>
Date:   Fri, 8 May 2020 12:34:40 +0530
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On 5/7/20 9:58 PM, Paul A. Clarke wrote:
> From: "Paul A. Clarke" <pc@us.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@us.ibm.com>

Reviewed-by: Kajol Jain <kjain@linux.ibm.com>

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",
>