The following commit has been merged into the perf/urgent branch of tip:
Commit-ID: 7074674e7338863e6404909c9761d4d3a610a379
Gitweb: https://git.kernel.org/tip/7074674e7338863e6404909c9761d4d3a610a379
Author: Andi Kleen <ak@xxxxxxxxxxxxxxx>
AuthorDate: Wed, 20 Nov 2019 16:15:13 -08:00
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitterDate: Fri, 29 Nov 2019 12:20:45 -03:00
perf cpumap: Maintain cpumaps ordered and without dups
Enforce this in _trim()
Needed for followon change.
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Link: http://lore.kernel.org/lkml/20191121001522.180827-4-andi@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
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 2ca1faf..d81656b 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);
}
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