perf script: Support data page size

Display the data page size if it is available and asked by the user:

Can be configured by the user, for example:

  perf script --fields comm,event,phys_addr,data_page_size
            dtlb mem-loads:uP:        3fec82ea8 4K
            dtlb mem-loads:uP:        3fec82e90 4K
            dtlb mem-loads:uP:        3e23700a4 4K
            dtlb mem-loads:uP:        3fec82f20 4K
            dtlb mem-loads:uP:        3e23700a4 4K
            dtlb mem-loads:uP:        3b4211bec 4K
            dtlb mem-loads:uP:        382205dc0 2M
            dtlb mem-loads:uP:        36fa082c0 2M
            dtlb mem-loads:uP:        377607340 2M
            dtlb mem-loads:uP:        330010180 2M
            dtlb mem-loads:uP:        33200fd80 2M
            dtlb mem-loads:uP:        31b012b80 2M

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Stephane Eranian <eranian@google.com>
Cc: Will Deacon <will@kernel.org>
Link: http://lore.kernel.org/lkml/20201216185805.9981-2-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Documentation/perf-script.txt

@@ -116,8 +116,9 @@ OPTIONS
 --fields::
         Comma separated list of fields to print. Options are:
         comm, tid, pid, time, cpu, event, trace, ip, sym, dso, addr, symoff,
-        srcline, period, iregs, uregs, brstack, brstacksym, flags, bpf-output, brstackinsn,
+        srcline, period, iregs, uregs, brstack, brstacksym, flags, bpf-output,
-        brstackoff, callindent, insn, insnlen, synth, phys_addr, metric, misc, srccode, ipc.
+        brstackinsn, brstackoff, callindent, insn, insnlen, synth, phys_addr,
+        metric, misc, srccode, ipc, data_page_size.
         Field list can be prepended with the type, trace, sw or hw,
         to indicate to which event type the field list applies.
         e.g., -F sw:comm,tid,time,ip,sym  and -F trace:time,cpu,trace

tools/perf/builtin-script.c

@@ -30,6 +30,7 @@
 #include "util/thread-stack.h"
 #include "util/time-utils.h"
 #include "util/path.h"
+#include "util/event.h"
 #include "ui/ui.h"
 #include "print_binary.h"
 #include "archinsn.h"
@@ -115,6 +116,7 @@ enum perf_output_field {
 	PERF_OUTPUT_SRCCODE	    = 1ULL << 30,
 	PERF_OUTPUT_IPC             = 1ULL << 31,
 	PERF_OUTPUT_TOD             = 1ULL << 32,
+	PERF_OUTPUT_DATA_PAGE_SIZE  = 1ULL << 33,
 };
 
 struct perf_script {
@@ -179,6 +181,7 @@ struct output_option {
 	{.str = "srccode", .field = PERF_OUTPUT_SRCCODE},
 	{.str = "ipc", .field = PERF_OUTPUT_IPC},
 	{.str = "tod", .field = PERF_OUTPUT_TOD},
+	{.str = "data_page_size", .field = PERF_OUTPUT_DATA_PAGE_SIZE},
 };
 
 enum {
@@ -251,7 +254,8 @@ static struct {
 			      PERF_OUTPUT_SYM | PERF_OUTPUT_SYMOFFSET |
 			      PERF_OUTPUT_DSO | PERF_OUTPUT_PERIOD |
 			      PERF_OUTPUT_ADDR | PERF_OUTPUT_DATA_SRC |
-			      PERF_OUTPUT_WEIGHT | PERF_OUTPUT_PHYS_ADDR,
+			      PERF_OUTPUT_WEIGHT | PERF_OUTPUT_PHYS_ADDR |
+			      PERF_OUTPUT_DATA_PAGE_SIZE,
 
 		.invalid_fields = PERF_OUTPUT_TRACE | PERF_OUTPUT_BPF_OUTPUT,
 	},
@@ -499,6 +503,10 @@ static int evsel__check_attr(struct evsel *evsel, struct perf_session *session)
 	    evsel__check_stype(evsel, PERF_SAMPLE_PHYS_ADDR, "PHYS_ADDR", PERF_OUTPUT_PHYS_ADDR))
 		return -EINVAL;
 
+	if (PRINT_FIELD(DATA_PAGE_SIZE) &&
+	    evsel__check_stype(evsel, PERF_SAMPLE_DATA_PAGE_SIZE, "DATA_PAGE_SIZE", PERF_OUTPUT_DATA_PAGE_SIZE))
+		return -EINVAL;
+
 	return 0;
 }
 
@@ -1920,6 +1928,7 @@ static void process_event(struct perf_script *script,
 	unsigned int type = output_type(attr->type);
 	struct evsel_script *es = evsel->priv;
 	FILE *fp = es->fp;
+	char str[PAGE_SIZE_NAME_LEN];
 
 	if (output[type].fields == 0)
 		return;
@@ -2008,6 +2017,9 @@ static void process_event(struct perf_script *script,
 	if (PRINT_FIELD(PHYS_ADDR))
 		fprintf(fp, "%16" PRIx64, sample->phys_addr);
 
+	if (PRINT_FIELD(DATA_PAGE_SIZE))
+		fprintf(fp, " %s", get_page_size_name(sample->data_page_size, str));
+
 	perf_sample__fprintf_ipc(sample, attr, fp);
 
 	fprintf(fp, "\n");
@@ -3506,7 +3518,8 @@ int cmd_script(int argc, const char **argv)
 		     "Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,"
 		     "addr,symoff,srcline,period,iregs,uregs,brstack,"
 		     "brstacksym,flags,bpf-output,brstackinsn,brstackoff,"
-		     "callindent,insn,insnlen,synth,phys_addr,metric,misc,ipc,tod",
+		     "callindent,insn,insnlen,synth,phys_addr,metric,misc,ipc,tod,"
+		     "data_page_size",
 		     parse_output_fields),
 	OPT_BOOLEAN('a', "all-cpus", &system_wide,
 		    "system-wide collection from all CPUs"),

tools/perf/util/event.h

@@ -409,4 +409,7 @@ extern int sysctl_perf_event_max_stack;
 extern int sysctl_perf_event_max_contexts_per_stack;
 extern unsigned int proc_map_timeout;
 
+#define PAGE_SIZE_NAME_LEN	32
+char *get_page_size_name(u64 size, char *str);
+
 #endif /* __PERF_RECORD_H */

tools/perf/util/session.c

@@ -32,6 +32,7 @@
 #include "ui/progress.h"
 #include "../perf.h"
 #include "arch/common.h"
+#include "units.h"
 #include <internal/lib.h>
 
 #ifdef HAVE_ZSTD_SUPPORT
@@ -1258,10 +1259,19 @@ static void dump_event(struct evlist *evlist, union perf_event *event,
 	       event->header.size, perf_event__name(event->header.type));
 }
 
+char *get_page_size_name(u64 size, char *str)
+{
+	if (!size || !unit_number__scnprintf(str, PAGE_SIZE_NAME_LEN, size))
+		snprintf(str, PAGE_SIZE_NAME_LEN, "%s", "N/A");
+
+	return str;
+}
+
 static void dump_sample(struct evsel *evsel, union perf_event *event,
 			struct perf_sample *sample)
 {
 	u64 sample_type;
+	char str[PAGE_SIZE_NAME_LEN];
 
 	if (!dump_trace)
 		return;
@@ -1296,6 +1306,9 @@ static void dump_sample(struct evsel *evsel, union perf_event *event,
 	if (sample_type & PERF_SAMPLE_PHYS_ADDR)
 		printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
 
+	if (sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)
+		printf(" .. data page size: %s\n", get_page_size_name(sample->data_page_size, str));
+
 	if (sample_type & PERF_SAMPLE_TRANSACTION)
 		printf("... transaction: %" PRIx64 "\n", sample->transaction);