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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>
This commit is contained in:
Jaswinder Singh Rajput 2009-06-25 17:16:07 +05:30 committed by Ingo Molnar
parent 76c64c5e4c
commit 06813f6c74
1 changed files with 33 additions and 0 deletions
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33
tools/perf/util/parse-events.c
View File

@ -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);
/*