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| author |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-09-30 11:53:00 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-10-07 12:22:17 -0300 |
| commit | 608127f73779bfc199158b61efdbdb690720e542 (patch) | |
| tree | 6305a4ec15bc3574c0b994433ed44ac8c1538ad8 /tools/perf/builtin-top.c | |
| parent | perf env: Add routine to read the env->cpuid from the running machine (diff) | |
| download | wireguard-linux-608127f73779bfc199158b61efdbdb690720e542.tar.xz wireguard-linux-608127f73779bfc199158b61efdbdb690720e542.zip | |
perf top: Initialize perf_env->cpuid, needed by the per arch annotation init routine
Just read it so that later on the per arch init routine can use it,
e.g. x86__annotate_init().
When using a perf.data file this is obtained from a header that was put
there by 'perf record', and then it may be for another machine, another
arch.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-4t4n3o8l8s0tc2b1pq53hyr4@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-top.c')
| -rw-r--r-- | tools/perf/builtin-top.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 1f60124eb19b..611d03030abc 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -1560,6 +1560,17 @@ int cmd_top(int argc, const char **argv) status = perf_config(perf_top_config, &top); if (status) return status; + /* + * Since the per arch annotation init routine may need the cpuid, read + * it here, since we are not getting this from the perf.data header. + */ + status = perf_env__read_cpuid(&perf_env); + if (status) { + pr_err("Couldn't read the cpuid for this machine: %s\n", + str_error_r(errno, errbuf, sizeof(errbuf))); + goto out_delete_evlist; + } + top.evlist->env = &perf_env; argc = parse_options(argc, argv, options, top_usage, 0); if (argc) |