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perf top: Initialize perf_env->cpuid, needed by the per arch annotation init routine

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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>
This commit is contained in:
Arnaldo Carvalho de Melo 2019-09-30 11:53:00 -03:00
parent f1cedfb828
commit 608127f737
1 changed files with 11 additions and 0 deletions
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11
tools/perf/builtin-top.c
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@ -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)