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Date: Wed, 11 May 2022 15:43:23 +0800
From: Xing Zhengjun <zhengjun.xing@...ux.intel.com>
To: Ian Rogers <irogers@...gle.com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
John Garry <john.garry@...wei.com>,
Kan Liang <kan.liang@...ux.intel.com>,
Andi Kleen <ak@...ux.intel.com>, Felix Fietkau <nbd@....name>,
Qi Liu <liuqi115@...wei.com>, Like Xu <likexu@...cent.com>,
linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
Nick Forrington <nick.forrington@....com>,
Kajol Jain <kjain@...ux.ibm.com>,
James Clark <james.clark@....com>,
Andrew Kilroy <andrew.kilroy@....com>,
"Paul A . Clarke" <pc@...ibm.com>, Will Deacon <will@...nel.org>,
Mathieu Poirier <mathieu.poirier@...aro.org>,
ananth.narayan@....com, ravi.bangoria@....com,
santosh.shukla@....com, sandipan.das@....com,
Caleb Biggers <caleb.biggers@...el.com>,
Perry Taylor <perry.taylor@...el.com>,
Kshipra Bopardikar <kshipra.bopardikar@...el.com>
Cc: Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 4/7] perf jevents: Modify match field
On 5/11/2022 3:01 PM, Ian Rogers wrote:
> The match_field function looks for json values to append to the event
> string. As the C code processes these in order the output order matches
> that in the json dictionary. Python json readers read the entire
> dictionary and lose the ordering. To make the python and C output
> comparable makee the C code first read the extra fields then append them
The "makee" should be a typo.
> to the event in an order not determined by their order in the file.
>
> Modify the pmu-events test so that test expectations match the new
> order.
>
> Signed-off-by: Ian Rogers <irogers@...gle.com>
> ---
> tools/perf/pmu-events/jevents.c | 82 ++++++++++++++++++++-------------
> tools/perf/tests/pmu-events.c | 24 +++++-----
> 2 files changed, 62 insertions(+), 44 deletions(-)
>
> diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c
> index e1f7c7afd435..cee61c4ed59e 100644
> --- a/tools/perf/pmu-events/jevents.c
> +++ b/tools/perf/pmu-events/jevents.c
> @@ -207,21 +207,6 @@ static struct msrmap {
> { NULL, NULL }
> };
>
> -static struct field {
> - const char *field;
> - const char *kernel;
> -} fields[] = {
> - { "UMask", "umask=" },
> - { "CounterMask", "cmask=" },
> - { "Invert", "inv=" },
> - { "AnyThread", "any=" },
> - { "EdgeDetect", "edge=" },
> - { "SampleAfterValue", "period=" },
> - { "FCMask", "fc_mask=" },
> - { "PortMask", "ch_mask=" },
> - { NULL, NULL }
> -};
> -
> static void cut_comma(char *map, jsmntok_t *newval)
> {
> int i;
> @@ -233,21 +218,6 @@ static void cut_comma(char *map, jsmntok_t *newval)
> }
> }
>
> -static int match_field(char *map, jsmntok_t *field, int nz,
> - char **event, jsmntok_t *val)
> -{
> - struct field *f;
> - jsmntok_t newval = *val;
> -
> - for (f = fields; f->field; f++)
> - if (json_streq(map, field, f->field) && nz) {
> - cut_comma(map, &newval);
> - addfield(map, event, ",", f->kernel, &newval);
> - return 1;
> - }
> - return 0;
> -}
> -
> static struct msrmap *lookup_msr(char *map, jsmntok_t *val)
> {
> jsmntok_t newval = *val;
> @@ -581,6 +551,14 @@ static int json_events(const char *fn,
> jsmntok_t *precise = NULL;
> jsmntok_t *obj = tok++;
> bool configcode_present = false;
> + char *umask = NULL;
> + char *cmask = NULL;
> + char *inv = NULL;
> + char *any = NULL;
> + char *edge = NULL;
> + char *period = NULL;
> + char *fc_mask = NULL;
> + char *ch_mask = NULL;
>
> EXPECT(obj->type == JSMN_OBJECT, obj, "expected object");
> for (j = 0; j < obj->size; j += 2) {
> @@ -596,8 +574,23 @@ static int json_events(const char *fn,
> "Expected string value");
>
> nz = !json_streq(map, val, "0");
> - if (match_field(map, field, nz, &event, val)) {
> - /* ok */
> + /* match_field */
> + if (json_streq(map, field, "UMask") && nz) {
> + addfield(map, &umask, "", "umask=", val);
> + } else if (json_streq(map, field, "CounterMask") && nz) {
> + addfield(map, &cmask, "", "cmask=", val);
> + } else if (json_streq(map, field, "Invert") && nz) {
> + addfield(map, &inv, "", "inv=", val);
> + } else if (json_streq(map, field, "AnyThread") && nz) {
> + addfield(map, &any, "", "any=", val);
> + } else if (json_streq(map, field, "EdgeDetect") && nz) {
> + addfield(map, &edge, "", "edge=", val);
> + } else if (json_streq(map, field, "SampleAfterValue") && nz) {
> + addfield(map, &period, "", "period=", val);
> + } else if (json_streq(map, field, "FCMask") && nz) {
> + addfield(map, &fc_mask, "", "fc_mask=", val);
> + } else if (json_streq(map, field, "PortMask") && nz) {
> + addfield(map, &ch_mask, "", "ch_mask=", val);
> } else if (json_streq(map, field, "EventCode")) {
> char *code = NULL;
> addfield(map, &code, "", "", val);
> @@ -690,6 +683,23 @@ static int json_events(const char *fn,
> else
> snprintf(buf, sizeof buf, "event=%#llx", eventcode);
> addfield(map, &event, ",", buf, NULL);
> + if (any)
> + addfield(map, &event, ",", any, NULL);
> + if (ch_mask)
> + addfield(map, &event, ",", ch_mask, NULL);
> + if (cmask)
> + addfield(map, &event, ",", cmask, NULL);
> + if (edge)
> + addfield(map, &event, ",", edge, NULL);
> + if (fc_mask)
> + addfield(map, &event, ",", fc_mask, NULL);
> + if (inv)
> + addfield(map, &event, ",", inv, NULL);
> + if (period)
> + addfield(map, &event, ",", period, NULL);
> + if (umask)
> + addfield(map, &event, ",", umask, NULL);
> +
> if (je.desc && extra_desc)
> addfield(map, &je.desc, " ", extra_desc, NULL);
> if (je.long_desc && extra_desc)
> @@ -718,6 +728,14 @@ static int json_events(const char *fn,
> je.event = real_event(je.name, event);
> err = func(data, &je);
> free_strings:
> + free(umask);
> + free(cmask);
> + free(inv);
> + free(any);
> + free(edge);
> + free(period);
> + free(fc_mask);
> + free(ch_mask);
> free(event);
> free(je.desc);
> free(je.name);
> diff --git a/tools/perf/tests/pmu-events.c b/tools/perf/tests/pmu-events.c
> index b74c6ef59e51..f13368569d8b 100644
> --- a/tools/perf/tests/pmu-events.c
> +++ b/tools/perf/tests/pmu-events.c
> @@ -63,33 +63,33 @@ static const struct perf_pmu_test_event bp_l2_btb_correct = {
> static const struct perf_pmu_test_event segment_reg_loads_any = {
> .event = {
> .name = "segment_reg_loads.any",
> - .event = "umask=0x80,period=200000,event=0x6",
> + .event = "event=0x6,period=200000,umask=0x80",
> .desc = "Number of segment register loads",
> .topic = "other",
> },
> - .alias_str = "umask=0x80,period=0x30d40,event=0x6",
> + .alias_str = "event=0x6,period=0x30d40,umask=0x80",
> .alias_long_desc = "Number of segment register loads",
> };
>
> static const struct perf_pmu_test_event dispatch_blocked_any = {
> .event = {
> .name = "dispatch_blocked.any",
> - .event = "umask=0x20,period=200000,event=0x9",
> + .event = "event=0x9,period=200000,umask=0x20",
> .desc = "Memory cluster signals to block micro-op dispatch for any reason",
> .topic = "other",
> },
> - .alias_str = "umask=0x20,period=0x30d40,event=0x9",
> + .alias_str = "event=0x9,period=0x30d40,umask=0x20",
> .alias_long_desc = "Memory cluster signals to block micro-op dispatch for any reason",
> };
>
> static const struct perf_pmu_test_event eist_trans = {
> .event = {
> .name = "eist_trans",
> - .event = "umask=0x0,period=200000,event=0x3a",
> + .event = "event=0x3a,period=200000,umask=0x0",
> .desc = "Number of Enhanced Intel SpeedStep(R) Technology (EIST) transitions",
> .topic = "other",
> },
> - .alias_str = "umask=0,period=0x30d40,event=0x3a",
> + .alias_str = "event=0x3a,period=0x30d40,umask=0",
> .alias_long_desc = "Number of Enhanced Intel SpeedStep(R) Technology (EIST) transitions",
> };
>
> @@ -132,13 +132,13 @@ static const struct perf_pmu_test_event uncore_hisi_ddrc_flux_wcmd = {
> static const struct perf_pmu_test_event unc_cbo_xsnp_response_miss_eviction = {
> .event = {
> .name = "unc_cbo_xsnp_response.miss_eviction",
> - .event = "umask=0x81,event=0x22",
> + .event = "event=0x22,umask=0x81",
> .desc = "A cross-core snoop resulted from L3 Eviction which misses in some processor core. Unit: uncore_cbox ",
> .topic = "uncore",
> .long_desc = "A cross-core snoop resulted from L3 Eviction which misses in some processor core",
> .pmu = "uncore_cbox",
> },
> - .alias_str = "umask=0x81,event=0x22",
> + .alias_str = "event=0x22,umask=0x81",
> .alias_long_desc = "A cross-core snoop resulted from L3 Eviction which misses in some processor core",
> .matching_pmu = "uncore_cbox_0",
> };
> @@ -146,13 +146,13 @@ static const struct perf_pmu_test_event unc_cbo_xsnp_response_miss_eviction = {
> static const struct perf_pmu_test_event uncore_hyphen = {
> .event = {
> .name = "event-hyphen",
> - .event = "umask=0x00,event=0xe0",
> + .event = "event=0xe0,umask=0x00",
> .desc = "UNC_CBO_HYPHEN. Unit: uncore_cbox ",
> .topic = "uncore",
> .long_desc = "UNC_CBO_HYPHEN",
> .pmu = "uncore_cbox",
> },
> - .alias_str = "umask=0,event=0xe0",
> + .alias_str = "event=0xe0,umask=0",
> .alias_long_desc = "UNC_CBO_HYPHEN",
> .matching_pmu = "uncore_cbox_0",
> };
> @@ -160,13 +160,13 @@ static const struct perf_pmu_test_event uncore_hyphen = {
> static const struct perf_pmu_test_event uncore_two_hyph = {
> .event = {
> .name = "event-two-hyph",
> - .event = "umask=0x00,event=0xc0",
> + .event = "event=0xc0,umask=0x00",
> .desc = "UNC_CBO_TWO_HYPH. Unit: uncore_cbox ",
> .topic = "uncore",
> .long_desc = "UNC_CBO_TWO_HYPH",
> .pmu = "uncore_cbox",
> },
> - .alias_str = "umask=0,event=0xc0",
> + .alias_str = "event=0xc0,umask=0",
> .alias_long_desc = "UNC_CBO_TWO_HYPH",
> .matching_pmu = "uncore_cbox_0",
> };
--
Zhengjun Xing
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