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perf report: Introduce --mmaps
Similar to --tasks, producing the same output plus /proc/<PID>/maps
similar lines for each mmap record present in a perf.data file.
Please note that not all mmaps are stored, for instance, some of the
non-executable mmaps are only stored when 'perf record --data' is used,
when the user wants to resolve data accesses in addition to asking for
executable mmaps to get the DSO with symtabs.
E.g.:
# perf record sleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.018 MB perf.data (7 samples) ]
[root@jouet ~]# perf report --mmaps
# pid tid ppid comm
0 0 -1 |swapper
4137 4137 -1 |sleep
5628a35a1000-5628a37aa000 r-xp 00000000 3147148 /usr/bin/sleep
7fb65ad51000-7fb65b134000 r-xp 00000000 3149795 /usr/lib64/libc-2.26.so
7fb65b134000-7fb65b35e000 r-xp 00000000 3149715 /usr/lib64/ld-2.26.so
7ffd94b9f000-7ffd94ba1000 r-xp 00000000 0 [vdso]
#
# perf record sleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.019 MB perf.data (8 samples) ]
# perf report --mmaps
# pid tid ppid comm
0 0 -1 |swapper
4161 4161 -1 |sleep
55afae69a000-55afae8a3000 r-xp 00000000 3147148 /usr/bin/sleep
7f569f00d000-7f569f3f0000 r-xp 00000000 3149795 /usr/lib64/libc-2.26.so
7f569f3f0000-7f569f61a000 r-xp 00000000 3149715 /usr/lib64/ld-2.26.so
7fff6fffe000-7fff70000000 r-xp 00000000 0 [vdso]
#
# perf record time sleep 1
0.00user 0.00system 0:01.00elapsed 0%CPU (0avgtext+0avgdata 2156maxresident)k
0inputs+0outputs (0major+73minor)pagefaults 0swaps
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.019 MB perf.data (14 samples) ]
# perf report --mmaps
# pid tid ppid comm
0 0 -1 |swapper
4281 4281 -1 |time
560560dca000-560560fcf000 r-xp 00000000 3190458 /usr/bin/time
7fc175196000-7fc175579000 r-xp 00000000 3149795 /usr/lib64/libc-2.26.so
7fc175579000-7fc1757a3000 r-xp 00000000 3149715 /usr/lib64/ld-2.26.so
7ffc924f6000-7ffc924f8000 r-xp 00000000 0 [vdso]
4282 4282 4281 | sleep
560560dca000-560560fcf000 r-xp 00000000 3190458 /usr/bin/time
564b4de3c000-564b4e045000 r-xp 00000000 3147148 /usr/bin/sleep
7f6a5a716000-7f6a5aaf9000 r-xp 00000000 3149795 /usr/lib64/libc-2.26.so
7f6a5aaf9000-7f6a5ad23000 r-xp 00000000 3149715 /usr/lib64/ld-2.26.so
7fc175196000-7fc175579000 r-xp 00000000 3149795 /usr/lib64/libc-2.26.so
7fc175579000-7fc1757a3000 r-xp 00000000 3149715 /usr/lib64/ld-2.26.so
7ffc924f6000-7ffc924f8000 r-xp 00000000 0 [vdso]
7ffcec7e6000-7ffcec7e8000 r-xp 00000000 0 [vdso]
#
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-zulwdlg5rfowogr1qznorvvc@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo
parent
930f8b3479
commit
6439d7d16c
@ -457,6 +457,13 @@ include::itrace.txt[]
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will be printed. Each entry is function name or file/line. Enabled by
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default, disable with --no-inline.
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--mmaps::
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Show --tasks output plus mmap information in a format similar to
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/proc/<PID>/maps.
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Please note that not all mmaps are stored, options affecting which ones
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are include 'perf record --data', for instance.
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--stats::
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Display overall events statistics without any further processing.
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(like the one at the end of the perf report -D command)
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@ -469,4 +476,4 @@ include::callchain-overhead-calculation.txt[]
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SEE ALSO
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--------
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linkperf:perf-stat[1], linkperf:perf-annotate[1]
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linkperf:perf-stat[1], linkperf:perf-annotate[1], linkperf:perf-record[1]
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@ -52,6 +52,7 @@
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <linux/mman.h>
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#define PTIME_RANGE_MAX 10
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@ -65,6 +66,7 @@ struct report {
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bool mem_mode;
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bool stats_mode;
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bool tasks_mode;
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bool mmaps_mode;
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bool header;
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bool header_only;
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bool nonany_branch_mode;
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@ -608,6 +610,10 @@ static int stats_print(struct report *rep)
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static void tasks_setup(struct report *rep)
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{
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memset(&rep->tool, 0, sizeof(rep->tool));
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if (rep->mmaps_mode) {
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rep->tool.mmap = perf_event__process_mmap;
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rep->tool.mmap2 = perf_event__process_mmap2;
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}
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rep->tool.comm = perf_event__process_comm;
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rep->tool.exit = perf_event__process_exit;
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rep->tool.fork = perf_event__process_fork;
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@ -642,14 +648,46 @@ static struct task *tasks_list(struct task *task, struct machine *machine)
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return tasks_list(parent_task, machine);
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}
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static size_t maps__fprintf_task(struct maps *maps, int indent, FILE *fp)
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{
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size_t printed = 0;
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struct rb_node *nd;
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for (nd = rb_first(&maps->entries); nd; nd = rb_next(nd)) {
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struct map *map = rb_entry(nd, struct map, rb_node);
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printed += fprintf(fp, "%*s %" PRIx64 "-%" PRIx64 " %c%c%c%c %08" PRIx64 " %" PRIu64 " %s\n",
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indent, "", map->start, map->end,
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map->prot & PROT_READ ? 'r' : '-',
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map->prot & PROT_WRITE ? 'w' : '-',
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map->prot & PROT_EXEC ? 'x' : '-',
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map->flags & MAP_SHARED ? 's' : 'p',
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map->pgoff,
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map->ino, map->dso->name);
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}
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return printed;
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}
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static int map_groups__fprintf_task(struct map_groups *mg, int indent, FILE *fp)
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{
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int printed = 0, i;
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for (i = 0; i < MAP__NR_TYPES; ++i)
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printed += maps__fprintf_task(&mg->maps[i], indent, fp);
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return printed;
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}
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static void task__print_level(struct task *task, FILE *fp, int level)
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{
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struct thread *thread = task->thread;
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struct task *child;
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fprintf(fp, " %8d %8d %8d |%*s%s\n",
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int comm_indent = fprintf(fp, " %8d %8d %8d |%*s",
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thread->pid_, thread->tid, thread->ppid,
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level, "", thread__comm_str(thread));
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level, "");
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fprintf(fp, "%s\n", thread__comm_str(thread));
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map_groups__fprintf_task(thread->mg, comm_indent, fp);
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if (!list_empty(&task->children)) {
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list_for_each_entry(child, &task->children, list)
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@ -930,6 +968,7 @@ int cmd_report(int argc, const char **argv)
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"dump raw trace in ASCII"),
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OPT_BOOLEAN(0, "stats", &report.stats_mode, "Display event stats"),
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OPT_BOOLEAN(0, "tasks", &report.tasks_mode, "Display recorded tasks"),
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OPT_BOOLEAN(0, "mmaps", &report.mmaps_mode, "Display recorded tasks memory maps"),
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OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
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"file", "vmlinux pathname"),
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OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
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@ -1077,6 +1116,9 @@ int cmd_report(int argc, const char **argv)
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report.symbol_filter_str = argv[0];
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}
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if (report.mmaps_mode)
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report.tasks_mode = true;
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if (quiet)
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perf_quiet_option();
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@ -1194,7 +1236,7 @@ repeat:
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if (report.stats_mode || report.tasks_mode)
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use_browser = 0;
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if (report.stats_mode && report.tasks_mode) {
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pr_err("Error: --tasks and --stats options cannot be used together\n");
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pr_err("Error: --tasks and --mmaps can't be used together with --stats\n");
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goto error;
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}
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