From ffb5e0fb44d0829021a51f972df90166bc9b700e Mon Sep 17 00:00:00 2001 From: Han Pingtian Date: Thu, 20 Jan 2011 19:47:07 +0800 Subject: [PATCH] perf test: Use cpu_map->[cpu] when setting affinity When some of CPUs are offline: # cat /sys/devices/system/cpu/online 0,6-31 perf test will fail on #3 testcase: 3: detect open syscall event on all cpus: --- start --- perf_evsel__read_on_cpu: expected to intercept 111 calls on cpu 0, got 681 perf_evsel__read_on_cpu: expected to intercept 112 calls on cpu 1, got 117 perf_evsel__read_on_cpu: expected to intercept 113 calls on cpu 2, got 118 perf_evsel__read_on_cpu: expected to intercept 114 calls on cpu 3, got 119 perf_evsel__read_on_cpu: expected to intercept 115 calls on cpu 4, got 120 perf_evsel__read_on_cpu: expected to intercept 116 calls on cpu 5, got 121 perf_evsel__read_on_cpu: expected to intercept 117 calls on cpu 6, got 122 perf_evsel__read_on_cpu: expected to intercept 118 calls on cpu 7, got 123 perf_evsel__read_on_cpu: expected to intercept 119 calls on cpu 8, got 124 perf_evsel__read_on_cpu: expected to intercept 120 calls on cpu 9, got 125 perf_evsel__read_on_cpu: expected to intercept 121 calls on cpu 10, got 126 .... This patch try to use 'cpus->map[cpu]' when setting cpu affinity, and will check the return code of sched_setaffinity() LKML-Reference: <20110120114707.GA11781@hpt.nay.redhat.com> Signed-off-by: Han Pingtian Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-test.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/tools/perf/builtin-test.c b/tools/perf/builtin-test.c index ed56961..02958d6 100644 --- a/tools/perf/builtin-test.c +++ b/tools/perf/builtin-test.c @@ -380,13 +380,18 @@ static int test__open_syscall_event_on_all_cpus(void) for (cpu = 0; cpu < cpus->nr; ++cpu) { unsigned int ncalls = nr_open_calls + cpu; - CPU_SET(cpu, cpu_set); - sched_setaffinity(0, cpu_set_size, cpu_set); + CPU_SET_S(cpus->map[cpu], cpu_set_size, cpu_set); + if (sched_setaffinity(0, cpu_set_size, cpu_set) < 0) { + pr_debug("sched_setaffinity() failed on CPU %d: %s ", + cpus->map[cpu], + strerror(errno)); + goto out_close_fd; + } for (i = 0; i < ncalls; ++i) { fd = open("/etc/passwd", O_RDONLY); close(fd); } - CPU_CLR(cpu, cpu_set); + CPU_CLR_S(cpus->map[cpu], cpu_set_size, cpu_set); } /* @@ -410,7 +415,7 @@ static int test__open_syscall_event_on_all_cpus(void) expected = nr_open_calls + cpu; if (evsel->counts->cpu[cpu].val != expected) { pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls on cpu %d, got %Ld\n", - expected, cpu, evsel->counts->cpu[cpu].val); + expected, cpus->map[cpu], evsel->counts->cpu[cpu].val); goto out_close_fd; } } -- 2.7.4