lkml.org 
[lkml]   [2019]   [Nov]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 03/12] perf cpumap: Maintain cpumaps ordered and without dups
Date
From: Andi Kleen <ak@linux.intel.com>

Enforce this in _trim()

Needed for followon change.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
tools/perf/lib/cpumap.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/tools/perf/lib/cpumap.c b/tools/perf/lib/cpumap.c
index 2ca1fafa620d..d81656b4635e 100644
--- a/tools/perf/lib/cpumap.c
+++ b/tools/perf/lib/cpumap.c
@@ -68,14 +68,28 @@ static struct perf_cpu_map *cpu_map__default_new(void)
return cpus;
}

+static int cmp_int(const void *a, const void *b)
+{
+ return *(const int *)a - *(const int*)b;
+}
+
static struct perf_cpu_map *cpu_map__trim_new(int nr_cpus, int *tmp_cpus)
{
size_t payload_size = nr_cpus * sizeof(int);
struct perf_cpu_map *cpus = malloc(sizeof(*cpus) + payload_size);
+ int i, j;

if (cpus != NULL) {
- cpus->nr = nr_cpus;
memcpy(cpus->map, tmp_cpus, payload_size);
+ qsort(cpus->map, nr_cpus, sizeof(int), cmp_int);
+ /* Remove dups */
+ j = 0;
+ for (i = 0; i < nr_cpus; i++) {
+ if (i == 0 || cpus->map[i] != cpus->map[i - 1])
+ cpus->map[j++] = cpus->map[i];
+ }
+ cpus->nr = j;
+ assert(j <= nr_cpus);
refcount_set(&cpus->refcnt, 1);
}

--
2.23.0
\
 
 \ /
  Last update: 2019-11-21 01:16    [W:0.209 / U:0.044 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site