提交 028f12ee 编写于 作者: S Stephane Eranian 提交者: Arnaldo Carvalho de Melo

perf tools: Add new mem command for memory access profiling

This new command is a wrapper on top of perf record and perf report to
make it easier to configure for memory access profiling.

To record loads:
$ perf mem -t load rec .....

To record stores:
$ perf mem -t store rec .....

To get the report:
$ perf mem -t load rep
Signed-off-by: NStephane Eranian <eranian@google.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1359040242-8269-15-git-send-email-eranian@google.com
[ Fixed minor conflict with 66857b5a "Sort command-list.txt alphabetically" ]
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
上级 f4f7e28d
perf-mem(1)
===========
NAME
----
perf-mem - Profile memory accesses
SYNOPSIS
--------
[verse]
'perf mem' [<options>] (record [<command>] | report)
DESCRIPTION
-----------
"perf mem -t <TYPE> record" runs a command and gathers memory operation data
from it, into perf.data. Perf record options are accepted and are passed through.
"perf mem -t <TYPE> report" displays the result. It invokes perf report with the
right set of options to display a memory access profile.
OPTIONS
-------
<command>...::
Any command you can specify in a shell.
-t::
--type=::
Select the memory operation type: load or store (default: load)
-D::
--dump-raw-samples=::
Dump the raw decoded samples on the screen in a format that is easy to parse with
one sample per line.
-x::
--field-separator::
Specify the field separator used when dump raw samples (-D option). By default,
The separator is the space character.
-C::
--cpu-list::
Restrict dump of raw samples to those provided via this option. Note that the same
option can be passed in record mode. It will be interpreted the same way as perf
record.
SEE ALSO
--------
linkperf:perf-record[1], linkperf:perf-report[1]
......@@ -547,6 +547,7 @@ BUILTIN_OBJS += $(OUTPUT)builtin-lock.o
BUILTIN_OBJS += $(OUTPUT)builtin-kvm.o
BUILTIN_OBJS += $(OUTPUT)builtin-inject.o
BUILTIN_OBJS += $(OUTPUT)tests/builtin-test.o
BUILTIN_OBJS += $(OUTPUT)builtin-mem.o
PERFLIBS = $(LIB_FILE) $(LIBLK) $(LIBTRACEEVENT)
......
#include "builtin.h"
#include "perf.h"
#include "util/parse-options.h"
#include "util/trace-event.h"
#include "util/tool.h"
#include "util/session.h"
#define MEM_OPERATION_LOAD "load"
#define MEM_OPERATION_STORE "store"
static const char *mem_operation = MEM_OPERATION_LOAD;
struct perf_mem {
struct perf_tool tool;
char const *input_name;
symbol_filter_t annotate_init;
bool hide_unresolved;
bool dump_raw;
const char *cpu_list;
DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
};
static const char * const mem_usage[] = {
"perf mem [<options>] {record <command> |report}",
NULL
};
static int __cmd_record(int argc, const char **argv)
{
int rec_argc, i = 0, j;
const char **rec_argv;
char event[64];
int ret;
rec_argc = argc + 4;
rec_argv = calloc(rec_argc + 1, sizeof(char *));
if (!rec_argv)
return -1;
rec_argv[i++] = strdup("record");
if (!strcmp(mem_operation, MEM_OPERATION_LOAD))
rec_argv[i++] = strdup("-W");
rec_argv[i++] = strdup("-d");
rec_argv[i++] = strdup("-e");
if (strcmp(mem_operation, MEM_OPERATION_LOAD))
sprintf(event, "cpu/mem-stores/pp");
else
sprintf(event, "cpu/mem-loads/pp");
rec_argv[i++] = strdup(event);
for (j = 1; j < argc; j++, i++)
rec_argv[i] = argv[j];
ret = cmd_record(i, rec_argv, NULL);
free(rec_argv);
return ret;
}
static int
dump_raw_samples(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct perf_evsel *evsel __maybe_unused,
struct machine *machine)
{
struct perf_mem *mem = container_of(tool, struct perf_mem, tool);
struct addr_location al;
const char *fmt;
if (perf_event__preprocess_sample(event, machine, &al, sample,
mem->annotate_init) < 0) {
fprintf(stderr, "problem processing %d event, skipping it.\n",
event->header.type);
return -1;
}
if (al.filtered || (mem->hide_unresolved && al.sym == NULL))
return 0;
if (al.map != NULL)
al.map->dso->hit = 1;
if (symbol_conf.field_sep) {
fmt = "%d%s%d%s0x%"PRIx64"%s0x%"PRIx64"%s%"PRIu64
"%s0x%"PRIx64"%s%s:%s\n";
} else {
fmt = "%5d%s%5d%s0x%016"PRIx64"%s0x016%"PRIx64
"%s%5"PRIu64"%s0x%06"PRIx64"%s%s:%s\n";
symbol_conf.field_sep = " ";
}
printf(fmt,
sample->pid,
symbol_conf.field_sep,
sample->tid,
symbol_conf.field_sep,
event->ip.ip,
symbol_conf.field_sep,
sample->addr,
symbol_conf.field_sep,
sample->weight,
symbol_conf.field_sep,
sample->data_src,
symbol_conf.field_sep,
al.map ? (al.map->dso ? al.map->dso->long_name : "???") : "???",
al.sym ? al.sym->name : "???");
return 0;
}
static int process_sample_event(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct perf_evsel *evsel,
struct machine *machine)
{
return dump_raw_samples(tool, event, sample, evsel, machine);
}
static int report_raw_events(struct perf_mem *mem)
{
int err = -EINVAL;
int ret;
struct perf_session *session = perf_session__new(input_name, O_RDONLY,
0, false, &mem->tool);
if (session == NULL)
return -ENOMEM;
if (mem->cpu_list) {
ret = perf_session__cpu_bitmap(session, mem->cpu_list,
mem->cpu_bitmap);
if (ret)
goto out_delete;
}
if (symbol__init() < 0)
return -1;
printf("# PID, TID, IP, ADDR, LOCAL WEIGHT, DSRC, SYMBOL\n");
err = perf_session__process_events(session, &mem->tool);
if (err)
return err;
return 0;
out_delete:
perf_session__delete(session);
return err;
}
static int report_events(int argc, const char **argv, struct perf_mem *mem)
{
const char **rep_argv;
int ret, i = 0, j, rep_argc;
if (mem->dump_raw)
return report_raw_events(mem);
rep_argc = argc + 3;
rep_argv = calloc(rep_argc + 1, sizeof(char *));
if (!rep_argv)
return -1;
rep_argv[i++] = strdup("report");
rep_argv[i++] = strdup("--mem-mode");
rep_argv[i++] = strdup("-n"); /* display number of samples */
/*
* there is no weight (cost) associated with stores, so don't print
* the column
*/
if (strcmp(mem_operation, MEM_OPERATION_LOAD))
rep_argv[i++] = strdup("--sort=mem,sym,dso,symbol_daddr,"
"dso_daddr,tlb,locked");
for (j = 1; j < argc; j++, i++)
rep_argv[i] = argv[j];
ret = cmd_report(i, rep_argv, NULL);
free(rep_argv);
return ret;
}
int cmd_mem(int argc, const char **argv, const char *prefix __maybe_unused)
{
struct stat st;
struct perf_mem mem = {
.tool = {
.sample = process_sample_event,
.mmap = perf_event__process_mmap,
.comm = perf_event__process_comm,
.lost = perf_event__process_lost,
.fork = perf_event__process_fork,
.build_id = perf_event__process_build_id,
.ordered_samples = true,
},
.input_name = "perf.data",
};
const struct option mem_options[] = {
OPT_STRING('t', "type", &mem_operation,
"type", "memory operations(load/store)"),
OPT_BOOLEAN('D', "dump-raw-samples", &mem.dump_raw,
"dump raw samples in ASCII"),
OPT_BOOLEAN('U', "hide-unresolved", &mem.hide_unresolved,
"Only display entries resolved to a symbol"),
OPT_STRING('i', "input", &input_name, "file",
"input file name"),
OPT_STRING('C', "cpu", &mem.cpu_list, "cpu",
"list of cpus to profile"),
OPT_STRING('x', "field-separator", &symbol_conf.field_sep,
"separator",
"separator for columns, no spaces will be added"
" between columns '.' is reserved."),
OPT_END()
};
argc = parse_options(argc, argv, mem_options, mem_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
if (!argc || !(strncmp(argv[0], "rec", 3) || mem_operation))
usage_with_options(mem_usage, mem_options);
if (!mem.input_name || !strlen(mem.input_name)) {
if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
mem.input_name = "-";
else
mem.input_name = "perf.data";
}
if (!strncmp(argv[0], "rec", 3))
return __cmd_record(argc, argv);
else if (!strncmp(argv[0], "rep", 3))
return report_events(argc, argv, &mem);
else
usage_with_options(mem_usage, mem_options);
return 0;
}
......@@ -36,6 +36,7 @@ extern int cmd_kvm(int argc, const char **argv, const char *prefix);
extern int cmd_test(int argc, const char **argv, const char *prefix);
extern int cmd_trace(int argc, const char **argv, const char *prefix);
extern int cmd_inject(int argc, const char **argv, const char *prefix);
extern int cmd_mem(int argc, const char **argv, const char *prefix);
extern int find_scripts(char **scripts_array, char **scripts_path_array);
#endif
......@@ -14,6 +14,7 @@ perf-kmem mainporcelain common
perf-kvm mainporcelain common
perf-list mainporcelain common
perf-lock mainporcelain common
perf-mem mainporcelain common
perf-probe mainporcelain full
perf-record mainporcelain common
perf-report mainporcelain common
......
......@@ -60,6 +60,7 @@ static struct cmd_struct commands[] = {
{ "trace", cmd_trace, 0 },
#endif
{ "inject", cmd_inject, 0 },
{ "mem", cmd_mem, 0 },
};
struct pager_config {
......
......@@ -520,6 +520,7 @@ hist_entry__collapse(struct hist_entry *left, struct hist_entry *right)
void hist_entry__free(struct hist_entry *he)
{
free(he->branch_info);
free(he->mem_info);
free(he);
}
......
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