perf stat: Fix transaction lenght metrics

The transaction length metrics in perf stat -T broke recently.

It would not match the metric correctly and always print K/sec.

This was caused by a incorrect update of the cycles_in_tx statistics.

Update the correct variable.

Also the check for zero division was reversed, which resulted in K/sec
being printed for no transactions. Fix this also up.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/1438039491-22091-1-git-send-email-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
index 53e8bb7bc8521a09f1347d48de2a0dd1eeb5e0bc..2a5d8d7698aedb8c82bdf8488f1fb62ded5b438a 100644 (file)
--- a/tools/perf/util/stat-shadow.c
+++ b/tools/perf/util/stat-shadow.c
@@ -85,7 +85,7 @@ void perf_stat__update_shadow_stats(struct perf_evsel *counter, u64 *count,
        else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
                update_stats(&runtime_cycles_stats[ctx][cpu], count[0]);
        else if (perf_stat_evsel__is(counter, CYCLES_IN_TX))
-               update_stats(&runtime_transaction_stats[ctx][cpu], count[0]);
+               update_stats(&runtime_cycles_in_tx_stats[ctx][cpu], count[0]);
        else if (perf_stat_evsel__is(counter, TRANSACTION_START))
                update_stats(&runtime_transaction_stats[ctx][cpu], count[0]);
        else if (perf_stat_evsel__is(counter, ELISION_START))
@@ -398,20 +398,18 @@ void perf_stat__print_shadow_stats(FILE *out, struct perf_evsel *evsel,
                                " #   %5.2f%% aborted cycles         ",
                                100.0 * ((total2-avg) / total));
        } else if (perf_stat_evsel__is(evsel, TRANSACTION_START) &&
-                  avg > 0 &&
                   runtime_cycles_in_tx_stats[ctx][cpu].n != 0) {
                total = avg_stats(&runtime_cycles_in_tx_stats[ctx][cpu]);
 
-               if (total)
+               if (avg)
                        ratio = total / avg;
 
                fprintf(out, " # %8.0f cycles / transaction   ", ratio);
        } else if (perf_stat_evsel__is(evsel, ELISION_START) &&
-                  avg > 0 &&
                   runtime_cycles_in_tx_stats[ctx][cpu].n != 0) {
                total = avg_stats(&runtime_cycles_in_tx_stats[ctx][cpu]);
 
-               if (total)
+               if (avg)
                        ratio = total / avg;
 
                fprintf(out, " # %8.0f cycles / elision       ", ratio);