diff options
| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-01-08 16:56:59 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-01-08 19:28:13 +0300 |
| commit | f2e14cd2c93699aa0aeaa8240457ab359f1258ff (patch) | |
| tree | 5885941a16e19d54ec358d0428b63b9fab03b0e7 /tools/perf | |
| parent | 9231967e2f515fce9e19687c0c40dfda416b3512 (diff) | |
| download | linux-f2e14cd2c93699aa0aeaa8240457ab359f1258ff.tar.xz | |
perf top: Lift restriction on using callchains without "sym" in --sort
This restriction is not present in 'perf report' and since 'perf top'
uses the same hists browser, remove it from it as well.
With this we create per event buckets with callchain trees, so that
# perf top --sort dso -g --no-children
Bucketizes samples by DSO and below it shows the callchains leading to
functions in this DSO.
Try also:
# perf top -e sched:*switch -g --no-children
To see the callchains leading to sched switches, pressing 'E' to expand
all one can quickly see the most common scheduler switches and what
leads to them, for instance, calls to IO, futexes, etc.
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: https://lkml.kernel.org/r/20190107140854.GA28965@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/builtin-top.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index fe3ecfb2e64b..f64e312db787 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -1028,12 +1028,7 @@ out_err: static int callchain_param__setup_sample_type(struct callchain_param *callchain) { - if (!perf_hpp_list.sym) { - if (callchain->enabled) { - ui__error("Selected -g but \"sym\" not present in --sort/-s."); - return -EINVAL; - } - } else if (callchain->mode != CHAIN_NONE) { + if (callchain->mode != CHAIN_NONE) { if (callchain_register_param(callchain) < 0) { ui__error("Can't register callchain params.\n"); return -EINVAL; |