linux-kernel - Re: [PATCH 1/2] perf: Fix POWER9 metric 'lsu_other_stall

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Date:   Fri, 8 May 2020 12:31:32 +0530
From:   kajoljain <kjain@...ux.ibm.com>
To:     "Paul A. Clarke" <pc@...ibm.com>, linux-perf-users@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, 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, irogers@...gle.com
Subject: Re: [PATCH 1/2] perf: Fix POWER9 metric 'lsu_other_stall_cpi'



On 5/8/20 12:01 PM, kajoljain wrote:
> 
> 
> On 5/7/20 9:58 PM, Paul A. Clarke wrote:
>> From: "Paul A. Clarke" <pc@...ibm.com>
>>
>> The metric definition is too long for the current value of EXPR_MAX_OTHER.
>> Increase the value EXPR_MAX_OTHER sufficiently to allow
>> 'lsu_other_stall_cpi' to build properly.
>>
>> Before:
>> --
>> $ perf list | grep lsu_other
>>   lsu_other_stall_cpi
>> # perf stat -a --metrics lsu_other_stall_cpi /bin/sleep 1
>> Cannot find metric or group `lsu_other_stall_cpi'
>>
>>  Usage: perf stat [<options>] [<command>]
>>
>>     -M, --metrics <metric/metric group list>
>>                           monitor specified metrics or metric groups (separated by ,)
>> --
>>
>> After:
>> --
>> # perf stat -a --metrics lsu_other_stall_cpi /bin/sleep 1
>>
>>  Performance counter stats for 'system wide':
>>
>>        438,086,889      pm_cmplu_stall_lsu        #     1.74 lsu_other_stall_cpi
>> [...]
>> --
>>
>> Signed-off-by: Paul A. Clarke <pc@...ibm.com>
>> ---
>>  tools/perf/util/expr.h | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/tools/perf/util/expr.h b/tools/perf/util/expr.h
>> index 87d627bb699b..a0991959cca4 100644
>> --- a/tools/perf/util/expr.h
>> +++ b/tools/perf/util/expr.h
>> @@ -2,7 +2,7 @@
>>  #ifndef PARSE_CTX_H
>>  #define PARSE_CTX_H 1
>>  
>> -#define EXPR_MAX_OTHER 20
>> +#define EXPR_MAX_OTHER 28
> 
> Hi Paul,
> 	Ian already add one patch to increase EXPR_MAX_OTHER value to 68 which is Acked-by: Jiri

Sorry its 64 not 68 and I missed earlier response from Arnaldo and Ian.

Thanks,
Kajol Jain
> 
> Link to the patch: https://lkml.org/lkml/2020/5/1/1023
> 
> Thanks,
> Kajol Jain
> 
>>  #define MAX_PARSE_ID EXPR_MAX_OTHER
>>  
>>  struct expr_parse_id {
>>