perf tests: Set evlist of test__backward_ring_buffer() to !overwrite
Setting overwrite in perf_evlist__mmap() is meaningless because the event in this evlist is already have 'overwrite' postfix and goes to backward ring buffer automatically. Pass 'false' to perf_evlist__mmap() to make it similar to others. Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/20171113013809.212417-3-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -59,7 +59,7 @@ static int do_test(struct perf_evlist *evlist, int mmap_pages,
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int err;
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char sbuf[STRERR_BUFSIZE];
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err = perf_evlist__mmap(evlist, mmap_pages, true);
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err = perf_evlist__mmap(evlist, mmap_pages, false);
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if (err < 0) {
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pr_debug("perf_evlist__mmap: %s\n",
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str_error_r(errno, sbuf, sizeof(sbuf)));
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