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Date: Mon, 17 Feb 2020 09:22:57 +0800 From: "Jin, Yao" <yao.jin@...ux.intel.com> To: Jiri Olsa <jolsa@...hat.com> Cc: acme@...nel.org, jolsa@...nel.org, peterz@...radead.org, mingo@...hat.com, alexander.shishkin@...ux.intel.com, Linux-kernel@...r.kernel.org, ak@...ux.intel.com, kan.liang@...el.com, yao.jin@...el.com Subject: Re: [PATCH v4] perf stat: Show percore counts in per CPU output On 2/17/2020 6:54 AM, Jiri Olsa wrote: > On Fri, Feb 14, 2020 at 04:04:52PM +0800, Jin Yao wrote: > > SNIP > >> CPU1 1,009,312 cpu/event=cpu-cycles,percore/ >> CPU2 2,784,072 cpu/event=cpu-cycles,percore/ >> CPU3 2,427,922 cpu/event=cpu-cycles,percore/ >> CPU4 2,752,148 cpu/event=cpu-cycles,percore/ >> CPU6 2,784,072 cpu/event=cpu-cycles,percore/ >> CPU7 2,427,922 cpu/event=cpu-cycles,percore/ >> >> 1.001416041 seconds time elapsed >> >> v4: >> --- >> Ravi Bangoria reports an issue in v3. Once we offline a CPU, >> the output is not correct. The issue is we should use the cpu >> idx in print_percore_thread rather than using the cpu value. > > Acked-by: Jiri Olsa <jolsa@...nel.org> > Thanks so much for ACK this patch. :) > btw, there's slight misalignment in -I output, but not due > to your change, it's there for some time now, and probably > in other agregation outputs as well: > > > $ sudo ./perf stat -e cpu/event=cpu-cycles/ -a -A -I 1000 > # time CPU counts unit events > 1.000224464 CPU0 7,251,151 cpu/event=cpu-cycles/ > 1.000224464 CPU1 21,614,946 cpu/event=cpu-cycles/ > 1.000224464 CPU2 30,812,097 cpu/event=cpu-cycles/ > > should be (extra space after CPUX): > > 1.000224464 CPU2 30,812,097 cpu/event=cpu-cycles/ > > I'll put it on my TODO, but if you're welcome to check on it ;-) > > thanks, > jirka > I have a simple fix for this misalignment issue. diff --git a/tools/perf/util/stat-display.c b/tools/perf/util/stat-display.c index bc31fccc0057..95b29c9cba36 100644 --- a/tools/perf/util/stat-display.c +++ b/tools/perf/util/stat-display.c @@ -114,11 +114,11 @@ static void aggr_printout(struct perf_stat_config *config, fprintf(config->output, "S%d-D%d-C%*d%s", cpu_map__id_to_socket(id), cpu_map__id_to_die(id), - config->csv_output ? 0 : -5, + config->csv_output ? 0 : -3, cpu_map__id_to_cpu(id), config->csv_sep); } else { - fprintf(config->output, "CPU%*d%s ", - config->csv_output ? 0 : -5, + fprintf(config->output, "CPU%*d%s", + config->csv_output ? 0 : -7, evsel__cpus(evsel)->map[id], config->csv_sep); } Following command lines are tested OK. perf stat -e cpu/event=cpu-cycles/ -I 1000 perf stat -e cpu/event=cpu-cycles/ -a -I 1000 perf stat -e cpu/event=cpu-cycles/ -a -A -I 1000 perf stat -e cpu/event=cpu-cycles,percore/ -a -A -I 1000 perf stat -e cpu/event=cpu-cycles,percore/ -a -A --percore-show-thread -I 1000 Could you help to look at that? Thanks Jin Yao
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