From: Andi Kleen <andi@firstfloor.org>
To: acme@kernel.org
Cc: jolsa@kernel.org, linux-kernel@vger.kernel.org,
Andi Kleen <ak@linux.intel.com>
Subject: [PATCH v7 03/12] perf cpumap: Maintain cpumaps ordered and without dups
Date: Fri, 15 Nov 2019 21:52:20 -0800 [thread overview]
Message-ID: <20191116055229.62002-4-andi@firstfloor.org> (raw)
In-Reply-To: <20191116055229.62002-1-andi@firstfloor.org>
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
next prev parent reply other threads:[~2019-11-16 5:53 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-16 5:52 Optimize perf stat for large number of events/cpus Andi Kleen
2019-11-16 5:52 ` [PATCH v7 01/12] perf pmu: Use file system cache to optimize sysfs access Andi Kleen
2019-11-16 5:52 ` [PATCH v7 02/12] perf affinity: Add infrastructure to save/restore affinity Andi Kleen
2019-11-16 5:52 ` Andi Kleen [this message]
2019-11-16 5:52 ` [PATCH v7 04/12] perf evlist: Maintain evlist->all_cpus Andi Kleen
2019-11-16 5:52 ` [PATCH v7 05/12] perf evsel: Add iterator to iterate over events ordered by CPU Andi Kleen
2019-11-16 5:52 ` [PATCH v7 06/12] perf evsel: Add functions to close evsel on a CPU Andi Kleen
2019-11-16 5:52 ` [PATCH v7 07/12] perf stat: Use affinity for closing file descriptors Andi Kleen
2019-11-16 5:52 ` [PATCH v7 08/12] perf stat: Factor out open error handling Andi Kleen
2019-11-16 5:52 ` [PATCH v7 09/12] perf stat: Use affinity for opening events Andi Kleen
2019-11-20 15:07 ` Jiri Olsa
2019-11-20 22:31 ` Andi Kleen
2019-11-21 15:13 ` Jiri Olsa
2019-11-16 5:52 ` [PATCH v7 10/12] perf stat: Use affinity for reading Andi Kleen
2019-11-20 15:12 ` Jiri Olsa
2019-11-16 5:52 ` [PATCH v7 11/12] perf evsel: Add functions to enable/disable for a specific CPU Andi Kleen
2019-11-16 5:52 ` [PATCH v7 12/12] perf stat: Use affinity for enabling/disabling events Andi Kleen
2019-11-20 15:16 ` Optimize perf stat for large number of events/cpus Jiri Olsa
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