From: Kan Liang Date: Wed, 30 Mar 2016 19:16:15 +0000 (-0700) Subject: perf tools: Fix PMU term format max value calculation X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=ac0e2cd555373ae6f8f3a3ad3fbbf5b6d1e7aaaa;p=openwrt%2Fstaging%2Fblogic.git perf tools: Fix PMU term format max value calculation Currently the max value of format is calculated by the bits number. It relies on the continuity of the format. However, uncore event format is not continuous. E.g. uncore qpi event format can be 0-7,21. If bit 21 is set, there is parsing issues as below. $ perf stat -a -e uncore_qpi_0/event=0x200002,umask=0x8/ event syntax error: '..pi_0/event=0x200002,umask=0x8/' \___ value too big for format, maximum is 511 This patch return the real max value by setting all possible bits to 1. Signed-off-by: Kan Liang Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jiri Olsa Link: http://lkml.kernel.org/r/1459365375-14285-1-git-send-email-kan.liang@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index adef23b1352e..bf34468a99cb 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -602,14 +602,13 @@ static void pmu_format_value(unsigned long *format, __u64 value, __u64 *v, static __u64 pmu_format_max_value(const unsigned long *format) { - int w; + __u64 w = 0; + int fbit; - w = bitmap_weight(format, PERF_PMU_FORMAT_BITS); - if (!w) - return 0; - if (w < 64) - return (1ULL << w) - 1; - return -1; + for_each_set_bit(fbit, format, PERF_PMU_FORMAT_BITS) + w |= (1ULL << fbit); + + return w; } /*