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>

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 46d2c03814a1df389f832ba264a43f1fcb3cd2db..ae2ce255e8486263f624628635d1f201d2fe61d1 100644 (file)
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -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;
+}

diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 9a8fe012910a736d49e2054406bc976c8281115d..12755b42ea93c86f6069ccfc93df581803d6ac60 100644 (file)
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -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 */