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/openbmc/linux/tools/perf/util/ |
H A D | stat.c | 297767ac Tue May 19 23:27:35 CDT 2020 Jin Yao <yao.jin@linux.intel.com> perf stat: Copy counts from prev_raw_counts to evsel->counts
It would be useful to support the overall statistics for perf-stat interval mode. For example, report the summary at the end of "perf-stat -I" output.
But since perf-stat can support many aggregation modes, such as --per-thread, --per-socket, -M and etc, we need a solution which doesn't bring much complexity.
The idea is to use 'evsel->prev_raw_counts' which is updated in each interval and it's saved with the latest counts. Before reporting the summary, we copy the counts from evsel->prev_raw_counts to evsel->counts, and next we just follow non-interval processing.
v5: --- Don't save the previous aggr value to the member of [cpu0,thread0] in perf_counts. Originally that was a trick because the perf_stat_process_counter would create aggr values from per cpu values. But we don't need to do that all the time. We will handle it in next patch.
Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Reviewed-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200520042737.24160-4-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 297767ac Tue May 19 23:27:35 CDT 2020 Jin Yao <yao.jin@linux.intel.com> perf stat: Copy counts from prev_raw_counts to evsel->counts It would be useful to support the overall statistics for perf-stat interval mode. For example, report the summary at the end of "perf-stat -I" output. But since perf-stat can support many aggregation modes, such as --per-thread, --per-socket, -M and etc, we need a solution which doesn't bring much complexity. The idea is to use 'evsel->prev_raw_counts' which is updated in each interval and it's saved with the latest counts. Before reporting the summary, we copy the counts from evsel->prev_raw_counts to evsel->counts, and next we just follow non-interval processing. v5: --- Don't save the previous aggr value to the member of [cpu0,thread0] in perf_counts. Originally that was a trick because the perf_stat_process_counter would create aggr values from per cpu values. But we don't need to do that all the time. We will handle it in next patch. Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Reviewed-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200520042737.24160-4-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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H A D | stat.h | 297767ac Tue May 19 23:27:35 CDT 2020 Jin Yao <yao.jin@linux.intel.com> perf stat: Copy counts from prev_raw_counts to evsel->counts
It would be useful to support the overall statistics for perf-stat interval mode. For example, report the summary at the end of "perf-stat -I" output.
But since perf-stat can support many aggregation modes, such as --per-thread, --per-socket, -M and etc, we need a solution which doesn't bring much complexity.
The idea is to use 'evsel->prev_raw_counts' which is updated in each interval and it's saved with the latest counts. Before reporting the summary, we copy the counts from evsel->prev_raw_counts to evsel->counts, and next we just follow non-interval processing.
v5: --- Don't save the previous aggr value to the member of [cpu0,thread0] in perf_counts. Originally that was a trick because the perf_stat_process_counter would create aggr values from per cpu values. But we don't need to do that all the time. We will handle it in next patch.
Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Reviewed-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200520042737.24160-4-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 297767ac Tue May 19 23:27:35 CDT 2020 Jin Yao <yao.jin@linux.intel.com> perf stat: Copy counts from prev_raw_counts to evsel->counts It would be useful to support the overall statistics for perf-stat interval mode. For example, report the summary at the end of "perf-stat -I" output. But since perf-stat can support many aggregation modes, such as --per-thread, --per-socket, -M and etc, we need a solution which doesn't bring much complexity. The idea is to use 'evsel->prev_raw_counts' which is updated in each interval and it's saved with the latest counts. Before reporting the summary, we copy the counts from evsel->prev_raw_counts to evsel->counts, and next we just follow non-interval processing. v5: --- Don't save the previous aggr value to the member of [cpu0,thread0] in perf_counts. Originally that was a trick because the perf_stat_process_counter would create aggr values from per cpu values. But we don't need to do that all the time. We will handle it in next patch. Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Reviewed-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200520042737.24160-4-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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