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| author | Jaswinder Singh Rajput <jaswinder@kernel.org> | 2009-06-25 17:16:07 +0530 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-25 14:08:49 +0200 |
| commit | 06813f6c743420c16f9248ab59bd2e68a2de57ba (patch) | |
| tree | 86ebf73e025c1fbe0ecd8b3d0c9a673ae8c88995 /tools/perf | |
| parent | 76c64c5e4c47b6d28deb3cae8dfa07a93c2229dc (diff) | |
| download | linux-06813f6c743420c16f9248ab59bd2e68a2de57ba.tar.gz | |
perf_counter tools: Check for valid cache operations
Made new table for cache operartion stat 'hw_cache_stat' as: L1I : Read and prefetch only ITLB and BPU : Read-only introduce is_cache_op_valid() for cache operation validity And checks for valid cache operations. Reported-by : Ingo Molnar <mingo@elte.hu> Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <1245930367.5308.33.camel@localhost.localdomain> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/parse-events.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 06af2fadcd87..7939a21130d2 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -90,6 +90,34 @@ static char *hw_cache_result[][MAX_ALIASES] = { { "Miss" }, }; +#define C(x) PERF_COUNT_HW_CACHE_##x +#define CACHE_READ (1 << C(OP_READ)) +#define CACHE_WRITE (1 << C(OP_WRITE)) +#define CACHE_PREFETCH (1 << C(OP_PREFETCH)) +#define COP(x) (1 << x) + +/* + * cache operartion stat + * L1I : Read and prefetch only + * ITLB and BPU : Read-only + */ +static unsigned long hw_cache_stat[C(MAX)] = { + [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), + [C(L1I)] = (CACHE_READ | CACHE_PREFETCH), + [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), + [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), + [C(ITLB)] = (CACHE_READ), + [C(BPU)] = (CACHE_READ), +}; + +static int is_cache_op_valid(u8 cache_type, u8 cache_op) +{ + if (hw_cache_stat[cache_type] & COP(cache_op)) + return 1; /* valid */ + else + return 0; /* invalid */ +} + char *event_name(int counter) { u64 config = attrs[counter].config; @@ -123,6 +151,8 @@ char *event_name(int counter) if (cache_result > PERF_COUNT_HW_CACHE_RESULT_MAX) return "unknown-ext-hardware-cache-result"; + if (!is_cache_op_valid(cache_type, cache_op)) + return "invalid-cache"; sprintf(name, "%s-Cache-%s-%ses", hw_cache[cache_type][0], hw_cache_op[cache_op][0], @@ -179,6 +209,9 @@ parse_generic_hw_symbols(const char *str, struct perf_counter_attr *attr) if (cache_op == -1) cache_op = PERF_COUNT_HW_CACHE_OP_READ; + if (!is_cache_op_valid(cache_type, cache_op)) + return -EINVAL; + cache_result = parse_aliases(str, hw_cache_result, PERF_COUNT_HW_CACHE_RESULT_MAX); /* |