perf mem: Support data page size

Add option --data-page-size in "perf mem" to record/report data page
size.

Here are some examples:

  # perf mem --phys-data --data-page-size report -D
  # PID, TID, IP, ADDR, PHYS ADDR, DATA PAGE SIZE, LOCAL WEIGHT, DSRC, SYMBOL
  20134 20134 0xffffffffb5bd2fd0 0x016ffff9a274e96a308 0x000000044e96a308 4K  1168 0x5080144 /lib/modules/4.18.0-rc7+/build/vmlinux:perf_ctx_unlock
  20134 20134 0xffffffffb63f645c 0xffffffffb752b814 0xcfb52b814 2M 225 0x26a100142 /lib/modules/4.18.0-rc7+/build/vmlinux:_raw_spin_lock
  20134 20134 0xffffffffb660300c 0xfffffe00016b8bb0 0x0 4K 0 0x5080144 /lib/modules/4.18.0-rc7+/build/vmlinux:__x86_indirect_thunk_rax
  #

  # perf mem --phys-data --data-page-size report --stdio
  # To display the perf.data header info, please use
  # --header/--header-only options.
  #
  #
  # Total Lost Samples: 0
  #
  # Samples: 5K of event 'cpu/mem-loads,ldlat=30/P'
  # Total weight : 281234
  # Sort order   :
  # mem,sym,dso,symbol_daddr,dso_daddr,tlb,locked,phys_daddr,data_page_size
  #
  # Overhead  Samples  Memory access  Symbol                        Shared Object     Data Symbol             Data Object  TLB access    Locked  Data Physical Address   Data Page Size
  # ........  .......  .............  ............................  ................  ......................  ...........  ............  ......  ......................  ..............

    28.54%     1826    L1 or L1 hit   [k] __x86_indirect_thunk_rax  [kernel.vmlinux]  [k] 0xffffb0df31b0ff28  [unknown]    L1 or L2 hit  No      [k] 0x0000000000000000  4K
     6.02%      256    L1 or L1 hit   [.] touch_buffer              dtlb              [.] 0x00007ffd50109da8  [stack]      L1 or L2 hit  No      [.] 0x000000042454ada8  4K
     3.23%        5    L1 or L1 hit   [k] clear_huge_page           [kernel.vmlinux]  [k] 0xffff9a2753b8ce60  [unknown]    L1 or L2 hit  No      [k] 0x0000000453b8ce60  2M
     2.98%        4    L1 or L1 hit   [k] clear_page_erms           [kernel.vmlinux]  [k] 0xffffb0df31b0fd00  [unknown]    L1 or L2 hit  No      [k] 0x0000000000000000  4K

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: Ingo Molnar <mingo@kernel.org>
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: https://lore.kernel.org/r/20210105195752.43489-3-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 22 insertions, 1 deletions

diff --git a/tools/perf/Documentation/perf-mem.txt b/tools/perf/Documentation/perf-mem.txt
index 199ea0f0a6c0..66177511c5c4 100644
--- a/tools/perf/Documentation/perf-mem.txt
+++ b/tools/perf/Documentation/perf-mem.txt
@@ -63,6 +63,9 @@ OPTIONS
 --phys-data::
 	Record/Report sample physical addresses
 
+--data-page-size::
+	Record/Report sample data address page size
+
 RECORD OPTIONS
 --------------
 -e::
diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
index 7d6ee2208709..f3aac85aa9d4 100644
--- a/tools/perf/builtin-mem.c
+++ b/tools/perf/builtin-mem.c
@@ -30,6 +30,7 @@ struct perf_mem {
 	bool			dump_raw;
 	bool			force;
 	bool			phys_addr;
+	bool			data_page_size;
 	int			operation;
 	const char		*cpu_list;
 	DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
@@ -124,6 +125,9 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
 	if (mem->phys_addr)
 		rec_argv[i++] = "--phys-data";
 
+	if (mem->data_page_size)
+		rec_argv[i++] = "--data-page-size";
+
 	for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
 		e = perf_mem_events__ptr(j);
 		if (!e->record)
@@ -173,6 +177,7 @@ dump_raw_samples(struct perf_tool *tool,
 	struct perf_mem *mem = container_of(tool, struct perf_mem, tool);
 	struct addr_location al;
 	const char *fmt, *field_sep;
+	char str[PAGE_SIZE_NAME_LEN];
 
 	if (machine__resolve(machine, &al, sample) < 0) {
 		fprintf(stderr, "problem processing %d event, skipping it.\n",
@@ -209,6 +214,12 @@ dump_raw_samples(struct perf_tool *tool,
 			symbol_conf.field_sep);
 	}
 
+	if (mem->data_page_size) {
+		printf("%s%s",
+			get_page_size_name(sample->data_page_size, str),
+			symbol_conf.field_sep);
+	}
+
 	if (field_sep)
 		fmt = "%"PRIu64"%s0x%"PRIx64"%s%s:%s\n";
 	else
@@ -273,6 +284,9 @@ static int report_raw_events(struct perf_mem *mem)
 	if (mem->phys_addr)
 		printf("PHYS ADDR, ");
 
+	if (mem->data_page_size)
+		printf("DATA PAGE SIZE, ");
+
 	printf("LOCAL WEIGHT, DSRC, SYMBOL\n");
 
 	ret = perf_session__process_events(session);
@@ -283,7 +297,7 @@ out_delete:
 }
 static char *get_sort_order(struct perf_mem *mem)
 {
-	bool has_extra_options = mem->phys_addr ? true : false;
+	bool has_extra_options = (mem->phys_addr | mem->data_page_size) ? true : false;
 	char sort[128];
 
 	/*
@@ -302,6 +316,9 @@ static char *get_sort_order(struct perf_mem *mem)
 	if (mem->phys_addr)
 		strcat(sort, ",phys_daddr");
 
+	if (mem->data_page_size)
+		strcat(sort, ",data_page_size");
+
 	return strdup(sort);
 }
 
@@ -447,6 +464,7 @@ int cmd_mem(int argc, const char **argv)
 		   " between columns '.' is reserved."),
 	OPT_BOOLEAN('f', "force", &mem.force, "don't complain, do it"),
 	OPT_BOOLEAN('p', "phys-data", &mem.phys_addr, "Record/Report sample physical addresses"),
+	OPT_BOOLEAN(0, "data-page-size", &mem.data_page_size, "Record/Report sample data address page size"),
 	OPT_END()
 	};
 	const char *const mem_subcommands[] = { "record", "report", NULL };