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perf cgroup: Maintain cgroup hierarchy

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Each cgroup is kept in the perf_env's cgroup_tree sorted by the cgroup
id.  Hist entries have cgroup id can compare it directly and later it
can be used to find a group name using this tree.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200325124536.2800725-5-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim
2020-03-25 21:45:31 +09:00
committed by Arnaldo Carvalho de Melo
parent ba78c1c546
commit d1277aa36b
5 changed files with 109 additions and 5 deletions
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2
tools/perf/util/env.c
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@@ -6,6 +6,7 @@
#include <linux/ctype.h>
#include <linux/zalloc.h>
#include "bpf-event.h"
#include "cgroup.h"
#include <errno.h>
#include <sys/utsname.h>
#include <bpf/libbpf.h>
@@ -168,6 +169,7 @@ void perf_env__exit(struct perf_env *env)
int i;
perf_env__purge_bpf(env);
perf_env__purge_cgroups(env);
zfree(&env->hostname);
zfree(&env->os_release);
zfree(&env->version);