perf jevents: Modify match field

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 make the C code first read the extra fields then append them
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.

Reviewed-by: John Garry <john.garry@huawei.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ananth Narayan <ananth.narayan@amd.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrew Kilroy <andrew.kilroy@arm.com>
Cc: Caleb Biggers <caleb.biggers@intel.com>
Cc: Felix Fietkau <nbd@nbd.name>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Kshipra Bopardikar <kshipra.bopardikar@intel.com>
Cc: Like Xu <likexu@tencent.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nick Forrington <nick.forrington@arm.com>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Perry Taylor <perry.taylor@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Qi Liu <liuqi115@huawei.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Santosh Shukla <santosh.shukla@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Will Deacon <will@kernel.org>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Link: https://lore.kernel.org/r/20220511211526.1021908-5-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 50 insertions, 32 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);