linux-kernel - Re: [RFC 3/3] perf tools: Fix p_stage

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Date:   Tue, 16 Nov 2021 21:59:42 +0530
From:   Athira Rajeev <atrajeev@...ux.vnet.ibm.com>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>, Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Ian Rogers <irogers@...gle.com>,
        Stephane Eranian <eranian@...gle.com>,
        Kan Liang <kan.liang@...ux.intel.com>
Subject: Re: [RFC 3/3] perf tools: Fix p_stage_cyc sort key behavior



> On 06-Nov-2021, at 4:26 AM, Namhyung Kim <namhyung@...nel.org> wrote:
> 
> Like weight and local_weight, the p_stage_cyc (for pipeline stage
> cycles) should be handled the same way.  Not sure it also needs
> the local and global variants.

Hi Namhyung,

Thanks for the fixes. I could test the fix for "weight" and "ins_lat" in powerpc.
Also it makes sense to have global variant for p_stage_cyc as well. Thanks for pointing that. I will post fix to have both the variants for the p_stage_cyc.

Thanks
Athira
> 
> But I couldn't test it actually because I don't have the machine.
> 
> Cc: Kan Liang <kan.liang@...ux.intel.com>
> Cc: Athira Rajeev <atrajeev@...ux.vnet.ibm.com>
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
> tools/perf/util/hist.c | 12 ++++--------
> tools/perf/util/sort.c |  4 ++--
> tools/perf/util/sort.h |  2 +-
> 3 files changed, 7 insertions(+), 11 deletions(-)
> 
> diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
> index 54fe97dd191c..b776465e04ef 100644
> --- a/tools/perf/util/hist.c
> +++ b/tools/perf/util/hist.c
> @@ -289,12 +289,10 @@ static long hist_time(unsigned long htime)
> 	return htime;
> }
> 
> -static void he_stat__add_period(struct he_stat *he_stat, u64 period,
> -				u64 p_stage_cyc)
> +static void he_stat__add_period(struct he_stat *he_stat, u64 period)
> {
> 	he_stat->period		+= period;
> 	he_stat->nr_events	+= 1;
> -	he_stat->p_stage_cyc	+= p_stage_cyc;
> }
> 
> static void he_stat__add_stat(struct he_stat *dest, struct he_stat *src)
> @@ -305,7 +303,6 @@ static void he_stat__add_stat(struct he_stat *dest, struct he_stat *src)
> 	dest->period_guest_sys	+= src->period_guest_sys;
> 	dest->period_guest_us	+= src->period_guest_us;
> 	dest->nr_events		+= src->nr_events;
> -	dest->p_stage_cyc	+= src->p_stage_cyc;
> }
> 
> static void he_stat__decay(struct he_stat *he_stat)
> @@ -593,7 +590,6 @@ static struct hist_entry *hists__findnew_entry(struct hists *hists,
> 	struct hist_entry *he;
> 	int64_t cmp;
> 	u64 period = entry->stat.period;
> -	u64 p_stage_cyc = entry->stat.p_stage_cyc;
> 	bool leftmost = true;
> 
> 	p = &hists->entries_in->rb_root.rb_node;
> @@ -612,11 +608,11 @@ static struct hist_entry *hists__findnew_entry(struct hists *hists,
> 
> 		if (!cmp) {
> 			if (sample_self) {
> -				he_stat__add_period(&he->stat, period, p_stage_cyc);
> +				he_stat__add_period(&he->stat, period);
> 				hist_entry__add_callchain_period(he, period);
> 			}
> 			if (symbol_conf.cumulate_callchain)
> -				he_stat__add_period(he->stat_acc, period, p_stage_cyc);
> +				he_stat__add_period(he->stat_acc, period);
> 
> 			/*
> 			 * This mem info was allocated from sample__resolve_mem
> @@ -726,7 +722,6 @@ __hists__add_entry(struct hists *hists,
> 		.stat = {
> 			.nr_events = 1,
> 			.period	= sample->period,
> -			.p_stage_cyc = sample->p_stage_cyc,
> 		},
> 		.parent = sym_parent,
> 		.filtered = symbol__parent_filter(sym_parent) | al->filtered,
> @@ -741,6 +736,7 @@ __hists__add_entry(struct hists *hists,
> 		.time = hist_time(sample->time),
> 		.weight = sample->weight,
> 		.ins_lat = sample->ins_lat,
> +		.p_stage_cyc = sample->p_stage_cyc,
> 	}, *he = hists__findnew_entry(hists, &entry, al, sample_self);
> 
> 	if (!hists->has_callchains && he && he->callchain_size != 0)
> diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
> index adc0584695d6..a111065b484e 100644
> --- a/tools/perf/util/sort.c
> +++ b/tools/perf/util/sort.c
> @@ -1394,13 +1394,13 @@ struct sort_entry sort_global_ins_lat = {
> static int64_t
> sort__global_p_stage_cyc_cmp(struct hist_entry *left, struct hist_entry *right)
> {
> -	return left->stat.p_stage_cyc - right->stat.p_stage_cyc;
> +	return left->p_stage_cyc - right->p_stage_cyc;
> }
> 
> static int hist_entry__p_stage_cyc_snprintf(struct hist_entry *he, char *bf,
> 					size_t size, unsigned int width)
> {
> -	return repsep_snprintf(bf, size, "%-*u", width, he->stat.p_stage_cyc);
> +	return repsep_snprintf(bf, size, "%-*u", width, he->p_stage_cyc);
> }
> 
> struct sort_entry sort_p_stage_cyc = {
> diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
> index 22ae7c6ae398..7b7145501933 100644
> --- a/tools/perf/util/sort.h
> +++ b/tools/perf/util/sort.h
> @@ -49,7 +49,6 @@ struct he_stat {
> 	u64			period_us;
> 	u64			period_guest_sys;
> 	u64			period_guest_us;
> -	u64			p_stage_cyc;
> 	u32			nr_events;
> };
> 
> @@ -109,6 +108,7 @@ struct hist_entry {
> 	u64			code_page_size;
> 	u64			weight;
> 	u64			ins_lat;
> +	u64			p_stage_cyc;
> 	u8			cpumode;
> 	u8			depth;
> 
> -- 
> 2.34.0.rc0.344.g81b53c2807-goog
>