v4: --- 1. Use perf script time style for timestamp printing. Also add with the printing of sample duration. For example:
perf report --header time of first sample : 5276531.323099 time of last sample : 5276555.345625 sample duration : 24022.526 ms 2. Fix an invalid time string issue. For example, perf script --time 10%/10x12321xsdfdasfdsafdsafdsa Now in code, it uses strtol to replace atoi. 3. Remove perf_time__skip_sample, only uses perf_time__ranges_skip_sample in perf report/perf script. v3: --- 1. Move the definitions of first_sample_time/last_sample_time from perf_session and struct record to perf_evlist and update the related code. v2: --- 1. This patch creates a new header feature type HEADER_SAMPLE_TIME and related ops. Save the first sample time and the last sample time to the feature section in perf file header. 2. Add checking for last element in time range. For example, select the first and second 10% time slices. perf report --time 10%/1,10%/2 Note that now it includes the last element in [10%, 20%] but it doesn't include the last element in [0, 10%). It's to avoid the overlap. Following patches are changed: perf header: Record first sample time and last sample time in perf file header perf record: Get the first sample time and last sample time perf util: Create function to perform multiple time range checking v1: initial post ---------------- Current perf report/script/... have a --time option to limit the time range of output. But it only supports the absolute time. The patch series extend this option to let it support percent of time and support the multiple time ranges. For example: 1. Select the second 10% time slice perf report --time 10%/2 2. Select from 0% to 10% time slice perf report --time 0%-10% It also support the multiple time ranges. 3. Select the first and second 10% time slices perf report --time 10%/1,10%/2 4. Select from 0% to 10% and 30% to 40% slices perf report --time 0%-10%,30%-40% Jin Yao (6): perf header: Record first sample time and last sample time in perf file header perf record: Get the first sample time and last sample time perf util: Create function to parse time percent perf util: Create function to perform multiple time range checking perf report: support time percent and multiple time ranges perf script: support time percent and multiple time ranges tools/perf/Documentation/perf-report.txt | 16 ++ tools/perf/Documentation/perf-script.txt | 16 ++ tools/perf/Documentation/perf.data-file-format.txt | 4 + tools/perf/builtin-record.c | 5 + tools/perf/builtin-report.c | 28 ++- tools/perf/builtin-script.c | 25 ++- tools/perf/util/evlist.h | 2 + tools/perf/util/header.c | 60 ++++++ tools/perf/util/header.h | 1 + tools/perf/util/time-utils.c | 233 +++++++++++++++++++-- tools/perf/util/time-utils.h | 6 + 11 files changed, 375 insertions(+), 21 deletions(-) -- 2.7.4