linux-kernel - [PATCH] perf test: Fix metric parsing test

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Date:   Thu, 19 Nov 2020 20:54:11 +0530
From:   Kajol Jain <kjain@...ux.ibm.com>
To:     acme@...nel.org
Cc:     jolsa@...hat.com, linux-perf-users@...r.kernel.org,
        linux-kernel@...r.kernel.org, irogers@...gle.com,
        ravi.bangoria@...ux.ibm.com, kjain@...ux.ibm.com,
        maddy@...ux.ibm.com
Subject: [PATCH] perf test: Fix metric parsing test

Commit e1c92a7fbbc5 ("perf tests: Add another metric parsing test")
add another test for metric parsing. The test goes through all metrics
compiled for arch within pmu events and try to parse them.

Right now this test is failing in powerpc machine.

Result in power9 platform:

[command]# ./perf test 10
10: PMU events                                                      :
10.1: PMU event table sanity                                        : Ok
10.2: PMU event map aliases                                         : Ok
10.3: Parsing of PMU event table metrics                            : Skip (some metrics failed)
10.4: Parsing of PMU event table metrics with fake PMUs             : FAILED!

Issue is we are passing different runtime parameter value in "expr__find_other"
and "expr__parse" function which is called from function `metric_parse_fake`.
And because of this parsing of hv-24x7 metrics is failing.

[command]# ./perf test 10 -vv
.....
hv_24x7/pm_mcs01_128b_rd_disp_port01,chip=1/ not found
expr__parse failed
test child finished with -1
---- end ----
PMU events subtest 4: FAILED!

This patch fix this issue and change runtime parameter value to '0' in
expr__parse function.

Result in power9 platform after this patch:

[command]# ./perf test 10
10: PMU events                                                      :
10.1: PMU event table sanity                                        : Ok
10.2: PMU event map aliases                                         : Ok
10.3: Parsing of PMU event table metrics                            : Skip (some metrics failed)
10.4: Parsing of PMU event table metrics with fake PMUs             : Ok

Fixes: e1c92a7fbbc5 ("perf tests: Add another metric parsing test")
Signed-off-by: Kajol Jain <kjain@...ux.ibm.com>
---
 tools/perf/tests/pmu-events.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/tests/pmu-events.c b/tools/perf/tests/pmu-events.c
index ad2b21591275..0ca6a5a53523 100644
--- a/tools/perf/tests/pmu-events.c
+++ b/tools/perf/tests/pmu-events.c
@@ -575,7 +575,7 @@ static int metric_parse_fake(const char *str)
 		}
 	}

-	if (expr__parse(&result, &ctx, str, 1))
+	if (expr__parse(&result, &ctx, str, 0))
 		pr_err("expr__parse failed\n");
 	else
 		ret = 0;
-- 
2.27.0