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perf symbol: Create block_info structure 

'perf diff' currently can only diff symbols(functions).

We should expand it to diff cycles of individual programs blocks as
reported by timed LBR.  This would allow to identify changes in specific
code accurately.

We need a new structure to maintain the basic block information, such as,
symbol(function), start/end address of this block, cycles. This patch
creates this structure and with some ops.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1561713784-30533-2-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jin Yao 2019-06-28 17:22:58 +08:00 committed by Arnaldo Carvalho de Melo
parent 0c69b93112
commit 0cec2447e7
2 changed files with 45 additions and 0 deletions
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22
tools/perf/util/symbol.c
View File

@ -2351,3 +2351,25 @@ struct mem_info *mem_info__new(void)
refcount_set(&mi->refcnt, 1);
return mi;
}
struct block_info *block_info__get(struct block_info *bi)
{
if (bi)
refcount_inc(&bi->refcnt);
return bi;
}
void block_info__put(struct block_info *bi)
{
if (bi && refcount_dec_and_test(&bi->refcnt))
free(bi);
}
struct block_info *block_info__new(void)
{
struct block_info *bi = zalloc(sizeof(*bi));
if (bi)
refcount_set(&bi->refcnt, 1);
return bi;
}

23
tools/perf/util/symbol.h
View File

@ -131,6 +131,17 @@ struct mem_info {
refcount_t refcnt;
};
struct block_info {
struct symbol *sym;
u64 start;
u64 end;
u64 cycles;
u64 cycles_aggr;
int num;
int num_aggr;
refcount_t refcnt;
};
struct addr_location {
struct machine *machine;
struct thread *thread;
@ -332,4 +343,16 @@ static inline void __mem_info__zput(struct mem_info **mi)
#define mem_info__zput(mi) __mem_info__zput(&mi)
struct block_info *block_info__new(void);
struct block_info *block_info__get(struct block_info *bi);
void block_info__put(struct block_info *bi);
static inline void __block_info__zput(struct block_info **bi)
{
block_info__put(*bi);
*bi = NULL;
}
#define block_info__zput(bi) __block_info__zput(&bi)
#endif /* __PERF_SYMBOL */