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    Subject[PATCH 15/18] perf metric: Add DCache_L2 to metric parse test
    Date
    Adding test that compute DCache_L2 metrics with other related metrics in it.

    Signed-off-by: Jiri Olsa <jolsa@kernel.org>
    ---
    tools/perf/tests/parse-metric.c | 71 +++++++++++++++++++++++++++++++++
    1 file changed, 71 insertions(+)

    diff --git a/tools/perf/tests/parse-metric.c b/tools/perf/tests/parse-metric.c
    index 28f33893338b..b50e2a3f3b73 100644
    --- a/tools/perf/tests/parse-metric.c
    +++ b/tools/perf/tests/parse-metric.c
    @@ -36,6 +36,27 @@ static struct pmu_event pme_test[] = {
    .metric_expr = "(dcache_miss_cpi + icache_miss_cycles)",
    .metric_name = "cache_miss_cycles",
    },
    +{
    + .metric_expr = "L2_RQSTS.DEMAND_DATA_RD_HIT + L2_RQSTS.PF_HIT + L2_RQSTS.RFO_HIT",
    + .metric_name = "DCache_L2_All_Hits",
    +},
    +{
    + .metric_expr = "max(L2_RQSTS.ALL_DEMAND_DATA_RD - L2_RQSTS.DEMAND_DATA_RD_HIT, 0) + "
    + "L2_RQSTS.PF_MISS + L2_RQSTS.RFO_MISS",
    + .metric_name = "DCache_L2_All_Miss",
    +},
    +{
    + .metric_expr = "DCache_L2_All_Hits + DCache_L2_All_Miss",
    + .metric_name = "DCache_L2_All",
    +},
    +{
    + .metric_expr = "d_ratio(DCache_L2_All_Hits, DCache_L2_All)",
    + .metric_name = "DCache_L2_Hits",
    +},
    +{
    + .metric_expr = "d_ratio(DCache_L2_All_Miss, DCache_L2_All)",
    + .metric_name = "DCache_L2_Misses",
    +},
    };

    static struct pmu_events_map map = {
    @@ -194,10 +215,60 @@ static int test_cache_miss_cycles(void)
    return 0;
    }

    +
    +/*
    + * DCache_L2_All_Hits = L2_RQSTS.DEMAND_DATA_RD_HIT + L2_RQSTS.PF_HIT + L2_RQSTS.RFO_HI
    + * DCache_L2_All_Miss = MAX(L2_RQSTS.ALL_DEMAND_DATA_RD - L2_RQSTS.DEMAND_DATA_RD_HIT, 0) +
    + * L2_RQSTS.PF_MISS + L2_RQSTS.RFO_MISS
    + * DCache_L2_All = DCache_L2_All_Hits + DCache_L2_All_Miss
    + * DCache_L2_Hits = d_ratio(DCache_L2_All_Hits, DCache_L2_All)
    + * DCache_L2_Misses = d_ratio(DCache_L2_All_Miss, DCache_L2_All)
    + *
    + * L2_RQSTS.DEMAND_DATA_RD_HIT = 100
    + * L2_RQSTS.PF_HIT = 200
    + * L2_RQSTS.RFO_HI = 300
    + * L2_RQSTS.ALL_DEMAND_DATA_RD = 400
    + * L2_RQSTS.PF_MISS = 500
    + * L2_RQSTS.RFO_MISS = 600
    + *
    + * DCache_L2_All_Hits = 600
    + * DCache_L2_All_Miss = MAX(400 - 100, 0) + 500 + 600 = 1400
    + * DCache_L2_All = 600 + 1400 = 2000
    + * DCache_L2_Hits = 600 / 2000 = 0.3
    + * DCache_L2_Misses = 1400 / 2000 = 0.7
    + */
    +static int test_dcache_l2(void)
    +{
    + double ratio;
    + struct value vals[] = {
    + { .event = "L2_RQSTS.DEMAND_DATA_RD_HIT", .val = 100 },
    + { .event = "L2_RQSTS.PF_HIT", .val = 200 },
    + { .event = "L2_RQSTS.RFO_HIT", .val = 300 },
    + { .event = "L2_RQSTS.ALL_DEMAND_DATA_RD", .val = 400 },
    + { .event = "L2_RQSTS.PF_MISS", .val = 500 },
    + { .event = "L2_RQSTS.RFO_MISS", .val = 600 },
    + { 0 },
    + };
    +
    + TEST_ASSERT_VAL("failed to compute metric",
    + compute_metric("DCache_L2_Hits", vals, &ratio) == 0);
    +
    + TEST_ASSERT_VAL("DCache_L2_Hits failed, wrong ratio",
    + ratio == 0.3);
    +
    + TEST_ASSERT_VAL("failed to compute metric",
    + compute_metric("DCache_L2_Misses", vals, &ratio) == 0);
    +
    + TEST_ASSERT_VAL("DCache_L2_Misses failed, wrong ratio",
    + ratio == 0.7);
    + return 0;
    +}
    +
    int test__parse_metric(struct test *test __maybe_unused, int subtest __maybe_unused)
    {
    TEST_ASSERT_VAL("IPC failed", test_ipc() == 0);
    TEST_ASSERT_VAL("frontend failed", test_frontend() == 0);
    TEST_ASSERT_VAL("cache_miss_cycles failed", test_cache_miss_cycles() == 0);
    + TEST_ASSERT_VAL("DCache_L2 failed", test_dcache_l2() == 0);
    return 0;
    }
    --
    2.25.4
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