diff options
| author | Ulrich Drepper <drepper@redhat.com> | 2009-12-19 16:40:28 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-12-28 10:18:37 +0100 |
| commit | 659d8cfbb225f1fa5a4f8671a847ef3ab5a89660 (patch) | |
| tree | 5eb4d89c29110f8d82edbb86b6bf3a6aee431e4a /tools/perf/builtin-kmem.c | |
| parent | fd2a50a0240f5f5b59070474eabd83a85720a406 (diff) | |
perf tools: Do a few more directory handling optimizations
A few more optimizations for perf when dealing with directories.
Some of them significantly cut down the work which has to be
done. d_type should always be set; otherwise fix the kernel
code. And there are functions available to parse fstab-like
files, so use them.
Signed-off-by: Ulrich Drepper <drepper@redhat.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: a.p.zijlstra@chello.nl
Cc: acme@redhat.com
Cc: eranian@google.com
Cc: fweisbec@gmail.com
Cc: lizf@cn.fujitsu.com
Cc: paulus@samba.org
Cc: xiaoguangrong@cn.fujitsu.com
LKML-Reference: <200912192140.nBJLeSfA028905@hs20-bc2-1.build.redhat.com>
[ v2: two small stylistic fixlets ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/builtin-kmem.c')
| -rw-r--r-- | tools/perf/builtin-kmem.c | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c index 4c06828fe39d..05dc5a735039 100644 --- a/tools/perf/builtin-kmem.c +++ b/tools/perf/builtin-kmem.c @@ -92,23 +92,18 @@ static void setup_cpunode_map(void) if (!dir1) return; - while (true) { - dent1 = readdir(dir1); - if (!dent1) - break; - - if (sscanf(dent1->d_name, "node%u", &mem) < 1) + while ((dent1 = readdir(dir1)) != NULL) { + if (dent1->d_type != DT_DIR || + sscanf(dent1->d_name, "node%u", &mem) < 1) continue; snprintf(buf, PATH_MAX, "%s/%s", PATH_SYS_NODE, dent1->d_name); dir2 = opendir(buf); if (!dir2) continue; - while (true) { - dent2 = readdir(dir2); - if (!dent2) - break; - if (sscanf(dent2->d_name, "cpu%u", &cpu) < 1) + while ((dent2 = readdir(dir2)) != NULL) { + if (dent2->d_type != DT_LNK || + sscanf(dent2->d_name, "cpu%u", &cpu) < 1) continue; cpunode_map[cpu] = mem; } |