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: Stephane 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 66857b5 "Sort command-list.txt alphabetically" ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tirimbino
Stephane Eranian
12 years ago
committed by
Arnaldo Carvalho de Melo
parent
f4f7e28d0e
commit
028f12ee6b
@ -0,0 +1,48 @@ |
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perf-mem(1) |
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=========== |
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|
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NAME |
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---- |
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perf-mem - Profile memory accesses |
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|
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SYNOPSIS |
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-------- |
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[verse] |
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'perf mem' [<options>] (record [<command>] | report) |
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|
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DESCRIPTION |
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----------- |
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"perf mem -t <TYPE> record" runs a command and gathers memory operation data |
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from it, into perf.data. Perf record options are accepted and are passed through. |
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|
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"perf mem -t <TYPE> report" displays the result. It invokes perf report with the |
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right set of options to display a memory access profile. |
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|
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OPTIONS |
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------- |
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<command>...:: |
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Any command you can specify in a shell. |
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|
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-t:: |
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--type=:: |
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Select the memory operation type: load or store (default: load) |
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-D:: |
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--dump-raw-samples=:: |
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Dump the raw decoded samples on the screen in a format that is easy to parse with |
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one sample per line. |
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|
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-x:: |
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--field-separator:: |
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Specify the field separator used when dump raw samples (-D option). By default, |
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The separator is the space character. |
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|
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-C:: |
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--cpu-list:: |
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Restrict dump of raw samples to those provided via this option. Note that the same |
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option can be passed in record mode. It will be interpreted the same way as perf |
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record. |
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|
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SEE ALSO |
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-------- |
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linkperf:perf-record[1], linkperf:perf-report[1] |
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@ -0,0 +1,242 @@ |
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#include "builtin.h" |
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#include "perf.h" |
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#include "util/parse-options.h" |
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#include "util/trace-event.h" |
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#include "util/tool.h" |
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#include "util/session.h" |
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#define MEM_OPERATION_LOAD "load" |
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#define MEM_OPERATION_STORE "store" |
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static const char *mem_operation = MEM_OPERATION_LOAD; |
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struct perf_mem { |
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struct perf_tool tool; |
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char const *input_name; |
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symbol_filter_t annotate_init; |
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bool hide_unresolved; |
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bool dump_raw; |
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const char *cpu_list; |
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DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS); |
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}; |
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|
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static const char * const mem_usage[] = { |
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"perf mem [<options>] {record <command> |report}", |
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NULL |
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}; |
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|
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static int __cmd_record(int argc, const char **argv) |
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{ |
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int rec_argc, i = 0, j; |
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const char **rec_argv; |
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char event[64]; |
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int ret; |
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rec_argc = argc + 4; |
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rec_argv = calloc(rec_argc + 1, sizeof(char *)); |
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if (!rec_argv) |
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return -1; |
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rec_argv[i++] = strdup("record"); |
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if (!strcmp(mem_operation, MEM_OPERATION_LOAD)) |
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rec_argv[i++] = strdup("-W"); |
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rec_argv[i++] = strdup("-d"); |
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rec_argv[i++] = strdup("-e"); |
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if (strcmp(mem_operation, MEM_OPERATION_LOAD)) |
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sprintf(event, "cpu/mem-stores/pp"); |
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else |
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sprintf(event, "cpu/mem-loads/pp"); |
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rec_argv[i++] = strdup(event); |
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for (j = 1; j < argc; j++, i++) |
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rec_argv[i] = argv[j]; |
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ret = cmd_record(i, rec_argv, NULL); |
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free(rec_argv); |
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return ret; |
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} |
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static int |
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dump_raw_samples(struct perf_tool *tool, |
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union perf_event *event, |
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struct perf_sample *sample, |
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struct perf_evsel *evsel __maybe_unused, |
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struct machine *machine) |
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{ |
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struct perf_mem *mem = container_of(tool, struct perf_mem, tool); |
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struct addr_location al; |
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const char *fmt; |
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if (perf_event__preprocess_sample(event, machine, &al, sample, |
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mem->annotate_init) < 0) { |
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fprintf(stderr, "problem processing %d event, skipping it.\n", |
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event->header.type); |
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return -1; |
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} |
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if (al.filtered || (mem->hide_unresolved && al.sym == NULL)) |
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return 0; |
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if (al.map != NULL) |
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al.map->dso->hit = 1; |
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if (symbol_conf.field_sep) { |
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fmt = "%d%s%d%s0x%"PRIx64"%s0x%"PRIx64"%s%"PRIu64 |
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"%s0x%"PRIx64"%s%s:%s\n"; |
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} else { |
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fmt = "%5d%s%5d%s0x%016"PRIx64"%s0x016%"PRIx64 |
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"%s%5"PRIu64"%s0x%06"PRIx64"%s%s:%s\n"; |
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symbol_conf.field_sep = " "; |
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} |
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printf(fmt, |
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sample->pid, |
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symbol_conf.field_sep, |
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sample->tid, |
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symbol_conf.field_sep, |
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event->ip.ip, |
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symbol_conf.field_sep, |
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sample->addr, |
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symbol_conf.field_sep, |
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sample->weight, |
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symbol_conf.field_sep, |
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sample->data_src, |
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symbol_conf.field_sep, |
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al.map ? (al.map->dso ? al.map->dso->long_name : "???") : "???", |
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al.sym ? al.sym->name : "???"); |
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return 0; |
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} |
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static int process_sample_event(struct perf_tool *tool, |
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union perf_event *event, |
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struct perf_sample *sample, |
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struct perf_evsel *evsel, |
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struct machine *machine) |
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{ |
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return dump_raw_samples(tool, event, sample, evsel, machine); |
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} |
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static int report_raw_events(struct perf_mem *mem) |
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{ |
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int err = -EINVAL; |
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int ret; |
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struct perf_session *session = perf_session__new(input_name, O_RDONLY, |
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0, false, &mem->tool); |
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if (session == NULL) |
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return -ENOMEM; |
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if (mem->cpu_list) { |
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ret = perf_session__cpu_bitmap(session, mem->cpu_list, |
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mem->cpu_bitmap); |
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if (ret) |
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goto out_delete; |
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} |
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if (symbol__init() < 0) |
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return -1; |
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printf("# PID, TID, IP, ADDR, LOCAL WEIGHT, DSRC, SYMBOL\n"); |
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err = perf_session__process_events(session, &mem->tool); |
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if (err) |
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return err; |
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return 0; |
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out_delete: |
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perf_session__delete(session); |
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return err; |
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} |
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static int report_events(int argc, const char **argv, struct perf_mem *mem) |
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{ |
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const char **rep_argv; |
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int ret, i = 0, j, rep_argc; |
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if (mem->dump_raw) |
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return report_raw_events(mem); |
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rep_argc = argc + 3; |
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rep_argv = calloc(rep_argc + 1, sizeof(char *)); |
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if (!rep_argv) |
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return -1; |
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rep_argv[i++] = strdup("report"); |
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rep_argv[i++] = strdup("--mem-mode"); |
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rep_argv[i++] = strdup("-n"); /* display number of samples */ |
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/*
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* there is no weight (cost) associated with stores, so don't print |
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* the column |
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*/ |
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if (strcmp(mem_operation, MEM_OPERATION_LOAD)) |
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rep_argv[i++] = strdup("--sort=mem,sym,dso,symbol_daddr," |
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"dso_daddr,tlb,locked"); |
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for (j = 1; j < argc; j++, i++) |
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rep_argv[i] = argv[j]; |
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ret = cmd_report(i, rep_argv, NULL); |
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free(rep_argv); |
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return ret; |
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} |
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int cmd_mem(int argc, const char **argv, const char *prefix __maybe_unused) |
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{ |
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struct stat st; |
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struct perf_mem mem = { |
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.tool = { |
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.sample = process_sample_event, |
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.mmap = perf_event__process_mmap, |
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.comm = perf_event__process_comm, |
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.lost = perf_event__process_lost, |
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.fork = perf_event__process_fork, |
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.build_id = perf_event__process_build_id, |
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.ordered_samples = true, |
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}, |
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.input_name = "perf.data", |
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}; |
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const struct option mem_options[] = { |
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OPT_STRING('t', "type", &mem_operation, |
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"type", "memory operations(load/store)"), |
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OPT_BOOLEAN('D', "dump-raw-samples", &mem.dump_raw, |
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"dump raw samples in ASCII"), |
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OPT_BOOLEAN('U', "hide-unresolved", &mem.hide_unresolved, |
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"Only display entries resolved to a symbol"), |
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OPT_STRING('i', "input", &input_name, "file", |
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"input file name"), |
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OPT_STRING('C', "cpu", &mem.cpu_list, "cpu", |
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"list of cpus to profile"), |
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OPT_STRING('x', "field-separator", &symbol_conf.field_sep, |
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"separator", |
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"separator for columns, no spaces will be added" |
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" between columns '.' is reserved."), |
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OPT_END() |
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}; |
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argc = parse_options(argc, argv, mem_options, mem_usage, |
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PARSE_OPT_STOP_AT_NON_OPTION); |
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if (!argc || !(strncmp(argv[0], "rec", 3) || mem_operation)) |
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usage_with_options(mem_usage, mem_options); |
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if (!mem.input_name || !strlen(mem.input_name)) { |
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if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode)) |
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mem.input_name = "-"; |
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else |
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mem.input_name = "perf.data"; |
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} |
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if (!strncmp(argv[0], "rec", 3)) |
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return __cmd_record(argc, argv); |
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else if (!strncmp(argv[0], "rep", 3)) |
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return report_events(argc, argv, &mem); |
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else |
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usage_with_options(mem_usage, mem_options); |
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return 0; |
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} |
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