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Date: Mon, 2 Dec 2013 09:33:47 -0300
From: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
To: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Paul Mackerras <paulus@...ba.org>,
Ingo Molnar <mingo@...nel.org>,
Namhyung Kim <namhyung.kim@....com>,
LKML <linux-kernel@...r.kernel.org>,
Jiri Olsa <jolsa@...hat.com>, David Ahern <dsahern@...il.com>,
Stephane Eranian <eranian@...gle.com>,
Andi Kleen <andi@...stfloor.org>,
Pekka Enberg <penberg@...nel.org>,
Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [PATCH 3/3] perf report: Add --show-time-info option
Em Mon, Dec 02, 2013 at 03:53:19PM +0900, Namhyung Kim escreveu:
> From: Namhyung Kim <namhyung.kim@....com>
>
> The --show-time-info option is for displaying elapsed sampling time
Isn't that too long? Can't we use just --time/-t?
> information for each entry.
>
> $ perf record -- perf bench sched messaging
> $ perf report --stdio --show-time-info
> ...
> # Samples: 10K of event 'cycles'
> # Event count (approx.): 5118793536
> # Total sampling time : 0.184277 (sec)
> #
> # Overhead Time Command Shared Object Symbol
> # ........ .......... ............... ................. ...........................
> #
> 7.26% 0.007413 sched-messaging [unknown] [.] 0x0000003153e7a6e7
> 4.79% 0.006088 sched-messaging [kernel.kallsyms] [k] avc_has_perm_flags
> 4.38% 0.004809 sched-messaging [kernel.kallsyms] [k] copy_user_generic_string
> 3.81% 0.005457 sched-messaging [kernel.kallsyms] [k] _raw_spin_lock
> 2.92% 0.002745 sched-messaging [kernel.kallsyms] [k] _raw_spin_lock_irqsave
> 2.72% 0.002896 sched-messaging [kernel.kallsyms] [k] unix_stream_recvmsg
> 2.55% 0.003745 sched-messaging [kernel.kallsyms] [k] __slab_free
> 2.45% 0.002807 sched-messaging [kernel.kallsyms] [k] page_fault
> 2.08% 0.002258 sched-messaging [kernel.kallsyms] [k] sock_has_perm
>
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
> tools/perf/builtin-report.c | 2 ++
> tools/perf/ui/hist.c | 68 +++++++++++++++++++++++++++++++++++++--------
> tools/perf/util/hist.h | 1 +
> tools/perf/util/symbol.h | 3 +-
> 4 files changed, 62 insertions(+), 12 deletions(-)
>
> diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
> index eb849e9f7093..345cce6f5fa2 100644
> --- a/tools/perf/builtin-report.c
> +++ b/tools/perf/builtin-report.c
> @@ -898,6 +898,8 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
> OPT_BOOLEAN(0, "mem-mode", &report.mem_mode, "mem access profile"),
> OPT_CALLBACK(0, "percent-limit", &report, "percent",
> "Don't show entries under that percent", parse_percent_limit),
> + OPT_BOOLEAN(0, "show-time-info", &symbol_conf.show_time_info,
> + "Show a column with the elapsed time"),
> OPT_END()
> };
> struct perf_data_file file = {
> diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c
> index 78f4c92e9b73..7cf584a0bb61 100644
> --- a/tools/perf/ui/hist.c
> +++ b/tools/perf/ui/hist.c
> @@ -7,19 +7,24 @@
> #include "../util/evsel.h"
>
> /* hist period print (hpp) functions */
> +enum hpp_fmt_type {
> + HPP_FMT__PERCENT,
> + HPP_FMT__RAW,
> + HPP_FMT__TIME,
> +};
I wonder if we can't make this a bitmask... Does it make sense to print
both percent and time, for instance?
> typedef int (*hpp_snprint_fn)(char *buf, size_t size, const char *fmt, ...);
>
> static int __hpp__fmt(struct perf_hpp *hpp, struct hist_entry *he,
> u64 (*get_field)(struct hist_entry *),
> const char *fmt, hpp_snprint_fn print_fn,
> - bool fmt_percent)
> + enum hpp_fmt_type type)
> {
> int ret;
> struct hists *hists = he->hists;
> struct perf_evsel *evsel = hists_to_evsel(hists);
>
> - if (fmt_percent) {
> + if (type == HPP_FMT__PERCENT) {
> double percent = 0.0;
>
> if (hists->stats.total_period)
> @@ -27,8 +32,15 @@ static int __hpp__fmt(struct perf_hpp *hpp, struct hist_entry *he,
> hists->stats.total_period;
>
> ret = print_fn(hpp->buf, hpp->size, fmt, percent);
> - } else
> + } else if (type == HPP_FMT__RAW) {
> ret = print_fn(hpp->buf, hpp->size, fmt, get_field(he));
> + } else if (type == HPP_FMT__TIME) {
> + u64 time = get_field(he);
> + u64 sec = time / NSEC_PER_SEC;
> + u64 usec = (time - sec * NSEC_PER_SEC) / NSEC_PER_USEC;
> +
> + ret = print_fn(hpp->buf, hpp->size, fmt, sec, usec);
> + }
>
> if (perf_evsel__is_group_event(evsel)) {
> int prev_idx, idx_delta;
> @@ -53,15 +65,22 @@ static int __hpp__fmt(struct perf_hpp *hpp, struct hist_entry *he,
> * have no sample
> */
> ret += print_fn(hpp->buf + ret, hpp->size - ret,
> - fmt, 0);
> + fmt, 0, 0);
> }
>
> - if (fmt_percent)
> + if (type == HPP_FMT__PERCENT)
> ret += print_fn(hpp->buf + ret, hpp->size - ret,
> fmt, 100.0 * period / total);
> - else
> + else if (type == HPP_FMT__RAW)
> ret += print_fn(hpp->buf + ret, hpp->size - ret,
> fmt, period);
> + else if (type == HPP_FMT__TIME) {
> + u64 sec = period / NSEC_PER_SEC;
> + u64 usec = (period - sec * NSEC_PER_SEC) / NSEC_PER_USEC;
> +
> + ret += print_fn(hpp->buf + ret, hpp->size - ret,
> + fmt, sec, usec);
> + }
>
> prev_idx = perf_evsel__group_idx(evsel);
> }
> @@ -73,7 +92,7 @@ static int __hpp__fmt(struct perf_hpp *hpp, struct hist_entry *he,
> * zero-fill group members at last which have no sample
> */
> ret += print_fn(hpp->buf + ret, hpp->size - ret,
> - fmt, 0);
> + fmt, 0, 0);
> }
> }
> return ret;
> @@ -117,7 +136,7 @@ static int hpp__color_##_type(struct perf_hpp_fmt *fmt __maybe_unused, \
> struct perf_hpp *hpp, struct hist_entry *he) \
> { \
> return __hpp__fmt(hpp, he, he_get_##_field, " %6.2f%%", \
> - percent_color_snprintf, true); \
> + percent_color_snprintf, HPP_FMT__PERCENT); \
> }
>
> #define __HPP_ENTRY_PERCENT_FN(_type, _field) \
> @@ -126,7 +145,7 @@ static int hpp__entry_##_type(struct perf_hpp_fmt *_fmt __maybe_unused, \
> { \
> const char *fmt = symbol_conf.field_sep ? " %.2f" : " %6.2f%%"; \
> return __hpp__fmt(hpp, he, he_get_##_field, fmt, \
> - scnprintf, true); \
> + scnprintf, HPP_FMT__PERCENT); \
> }
>
> #define __HPP_ENTRY_RAW_FN(_type, _field) \
> @@ -139,7 +158,23 @@ static int hpp__entry_##_type(struct perf_hpp_fmt *_fmt __maybe_unused, \
> struct perf_hpp *hpp, struct hist_entry *he) \
> { \
> const char *fmt = symbol_conf.field_sep ? " %"PRIu64 : " %11"PRIu64; \
> - return __hpp__fmt(hpp, he, he_get_raw_##_field, fmt, scnprintf, false); \
> + return __hpp__fmt(hpp, he, he_get_raw_##_field, fmt, scnprintf, \
> + HPP_FMT__RAW); \
> +}
> +
> +#define __HPP_ENTRY_TIME_FN(_type, _field) \
> +static u64 he_get_raw_##_field(struct hist_entry *he) \
> +{ \
> + return he->stat._field; \
> +} \
> + \
> +static int hpp__entry_##_type(struct perf_hpp_fmt *_fmt __maybe_unused, \
> + struct perf_hpp *hpp, struct hist_entry *he) \
> +{ \
> + const char *fmt = symbol_conf.field_sep ? " %"PRIu64 ".%06"PRIu64 : \
> + " %2"PRIu64 ".%06"PRIu64; \
> + return __hpp__fmt(hpp, he, he_get_raw_##_field, fmt, scnprintf, \
> + HPP_FMT__TIME); \
> }
>
> #define HPP_PERCENT_FNS(_type, _str, _field, _min_width, _unit_width) \
> @@ -153,6 +188,11 @@ __HPP_HEADER_FN(_type, _str, _min_width, _unit_width) \
> __HPP_WIDTH_FN(_type, _min_width, _unit_width) \
> __HPP_ENTRY_RAW_FN(_type, _field)
>
> +#define HPP_TIME_FNS(_type, _str, _field, _min_width, _unit_width) \
> +__HPP_HEADER_FN(_type, _str, _min_width, _unit_width) \
> +__HPP_WIDTH_FN(_type, _min_width, _unit_width) \
> +__HPP_ENTRY_TIME_FN(_type, _field)
> +
>
> HPP_PERCENT_FNS(overhead, "Overhead", period, 8, 8)
> HPP_PERCENT_FNS(overhead_sys, "sys", period_sys, 8, 8)
> @@ -163,6 +203,8 @@ HPP_PERCENT_FNS(overhead_guest_us, "guest usr", period_guest_us, 9, 8)
> HPP_RAW_FNS(samples, "Samples", nr_events, 12, 12)
> HPP_RAW_FNS(period, "Period", period, 12, 12)
>
> +HPP_TIME_FNS(time, "Time", time, 10, 10)
> +
> #define HPP__COLOR_PRINT_FNS(_name) \
> { \
> .header = hpp__header_ ## _name, \
> @@ -185,7 +227,8 @@ struct perf_hpp_fmt perf_hpp__format[] = {
> HPP__COLOR_PRINT_FNS(overhead_guest_sys),
> HPP__COLOR_PRINT_FNS(overhead_guest_us),
> HPP__PRINT_FNS(samples),
> - HPP__PRINT_FNS(period)
> + HPP__PRINT_FNS(period),
> + HPP__PRINT_FNS(time)
> };
>
> LIST_HEAD(perf_hpp__list);
> @@ -223,6 +266,9 @@ void perf_hpp__init(void)
>
> if (symbol_conf.show_total_period)
> perf_hpp__column_enable(PERF_HPP__PERIOD);
> +
> + if (symbol_conf.show_time_info)
> + perf_hpp__column_enable(PERF_HPP__TIME);
> }
>
> void perf_hpp__column_register(struct perf_hpp_fmt *format)
> diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
> index 0433469812dc..17e89fb31db9 100644
> --- a/tools/perf/util/hist.h
> +++ b/tools/perf/util/hist.h
> @@ -162,6 +162,7 @@ enum {
> PERF_HPP__OVERHEAD_GUEST_US,
> PERF_HPP__SAMPLES,
> PERF_HPP__PERIOD,
> + PERF_HPP__TIME,
>
> PERF_HPP__MAX_INDEX
> };
> diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
> index f1031a1358a1..b29d26222c6f 100644
> --- a/tools/perf/util/symbol.h
> +++ b/tools/perf/util/symbol.h
> @@ -99,7 +99,8 @@ struct symbol_conf {
> annotate_asm_raw,
> annotate_src,
> event_group,
> - demangle;
> + demangle,
> + show_time_info;
> const char *vmlinux_name,
> *kallsyms_name,
> *source_prefix,
> --
> 1.7.11.7
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