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Date: Fri, 10 Jun 2011 17:42:08 -0300
From: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
To: Sam Liao <phyomh@...il.com>,
Frederic Weisbecker <fweisbec@...il.com>
Cc: linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH] [perf] Add inverted call graph report support.
Em Thu, Jun 09, 2011 at 02:44:19PM +0800, Sam Liao escreveu:
> Add "caller/callee" option to support inverted butterfly report,
> in the inverted report (with caller option), the call graph start
> from the callee's ancestor. Users can use such view to catch system's
> performance bottleneck from a sysprof like view. Using this option
> with specified sort order like pid gives us high level view of call
> graph statistics.
Looks OK, haven't had time to test tho.
Frédéric, can you process this one? Tomorrow I'll be off the grid,
vacations!
Thanks a lot,
- Arnaldo
> ---
> tools/perf/builtin-report.c | 28 ++++++++++++++++++++++------
> tools/perf/util/callchain.h | 6 ++++++
> tools/perf/util/hist.c | 3 ++-
> tools/perf/util/session.c | 7 ++++++-
> 4 files changed, 36 insertions(+), 8 deletions(-)
>
> diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
> index 287a173..2ceac45 100644
> --- a/tools/perf/builtin-report.c
> +++ b/tools/perf/builtin-report.c
> @@ -45,7 +45,7 @@ static struct perf_read_values show_threads_values;
> static const char default_pretty_printing_style[] = "normal";
> static const char *pretty_printing_style = default_pretty_printing_style;
>
> -static char callchain_default_opt[] = "fractal,0.5";
> +static char callchain_default_opt[] = "fractal,0.5,callee";
> static symbol_filter_t annotate_init;
>
> static int perf_session__add_hist_entry(struct perf_session *session,
> @@ -386,13 +386,29 @@ parse_callchain_opt(const struct option *opt
> __used, const char *arg,
> if (!tok)
> goto setup;
>
> - tok2 = strtok(NULL, ",");
> callchain_param.min_percent = strtod(tok, &endptr);
> if (tok == endptr)
> return -1;
>
> - if (tok2)
> + /* get the print limit */
> + tok2 = strtok(NULL, ",");
> + if (!tok2)
> + goto setup;
> +
> + if (tok2[0] != 'c') {
> callchain_param.print_limit = strtod(tok2, &endptr);
> + tok2 = strtok(NULL, ",");
> + if (!tok2)
> + goto setup;
> + }
> +
> + /* get the call chain order */
> + if (!strcmp(tok2, "caller"))
> + callchain_param.order = ORDER_CALLER;
> + else if (!strcmp(tok2, "callee"))
> + callchain_param.order = ORDER_CALLEE;
> + else
> + return -1;
> setup:
> if (callchain_register_param(&callchain_param) < 0) {
> fprintf(stderr, "Can't register callchain params\n");
> @@ -436,9 +452,9 @@ static const struct option options[] = {
> "regex filter to identify parent, see: '--sort parent'"),
> OPT_BOOLEAN('x', "exclude-other", &symbol_conf.exclude_other,
> "Only display entries with parent-match"),
> - OPT_CALLBACK_DEFAULT('g', "call-graph", NULL, "output_type,min_percent",
> - "Display callchains using output_type (graph, flat, fractal,
> or none) and min percent threshold. "
> - "Default: fractal,0.5", &parse_callchain_opt, callchain_default_opt),
> + OPT_CALLBACK_DEFAULT('g', "call-graph", NULL,
> "output_type,min_percent, call_order",
> + "Display callchains using output_type (graph, flat, fractal,
> or none) , min percent threshold and callchain order. "
> + "Default: fractal,0.5,callee", &parse_callchain_opt,
> callchain_default_opt),
> OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
> "only consider symbols in these dsos"),
> OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
> diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
> index 1a79df9..9b4ff16 100644
> --- a/tools/perf/util/callchain.h
> +++ b/tools/perf/util/callchain.h
> @@ -14,6 +14,11 @@ enum chain_mode {
> CHAIN_GRAPH_REL
> };
>
> +enum chain_order {
> + ORDER_CALLER,
> + ORDER_CALLEE
> +};
> +
> struct callchain_node {
> struct callchain_node *parent;
> struct list_head siblings;
> @@ -41,6 +46,7 @@ struct callchain_param {
> u32 print_limit;
> double min_percent;
> sort_chain_func_t sort;
> + enum chain_order order;
> };
>
> struct callchain_list {
> diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
> index 627a02e..dae4202 100644
> --- a/tools/perf/util/hist.c
> +++ b/tools/perf/util/hist.c
> @@ -14,7 +14,8 @@ enum hist_filter {
>
> struct callchain_param callchain_param = {
> .mode = CHAIN_GRAPH_REL,
> - .min_percent = 0.5
> + .min_percent = 0.5,
> + .order = ORDER_CALLEE
> };
>
> u16 hists__col_len(struct hists *self, enum hist_column col)
> diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
> index f5a8fbd..e545a4d 100644
> --- a/tools/perf/util/session.c
> +++ b/tools/perf/util/session.c
> @@ -247,9 +247,14 @@ int perf_session__resolve_callchain(struct
> perf_session *self,
> callchain_cursor_reset(&self->callchain_cursor);
>
> for (i = 0; i < chain->nr; i++) {
> - u64 ip = chain->ips[i];
> + u64 ip;
> struct addr_location al;
>
> + if (callchain_param.order == ORDER_CALLEE)
> + ip = chain->ips[i];
> + else
> + ip = chain->ips[chain->nr - i - 1];
> +
> if (ip >= PERF_CONTEXT_MAX) {
> switch (ip) {
> case PERF_CONTEXT_HV:
> --
> 1.7.4.1
> --
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