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perf trace: Beautify pid_t arguments

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When reading the syscall tracepoint /format file, look for arguments
of type "pid_t" and attach the PID beautifier, that will do a lookup
on the threads it knows, i.e. the ones that came from PERF_RECORD_COMM
events and add the COMM after the pid in such args:

Excerpt of a system wide trace for syscalls with pid_t args:

  55602.977 ( 0.006 ms): bash/12122 setpgid(pid: 24347 (bash), pgid: 24347 (bash)) = 0
  55603.024 ( 0.004 ms): bash/24347 setpgid(pid: 24347 (bash), pgid: 24347 (bash)) = 0
  55691.527 (88.397 ms): bash/12122 wait4(upid: -1, stat_addr: 0x7ffe0cee1720, options: UNTRACED|CONTINUED) ...
  55692.479 ( 0.952 ms): git/24347 wait4(upid: 24368, stat_addr: 0x7ffe030d5724) ...
  55694.549 ( 2.070 ms): pre-commit/24368 wait4(upid: -1, stat_addr: 0x7ffc94f4fc10) = 24369 (pre-commit)
  55694.575 ( 0.002 ms): pre-commit/24368 wait4(upid: -1, stat_addr: 0x7ffc94f4f650, options: NOHANG) = -1 ECHILD No child processes
  55695.934 ( 0.010 ms): pre-commit/24368 wait4(upid: -1, stat_addr: 0x7ffc94f4f2d0, options: NOHANG) = 24370 (git)
  55695.937 ( 0.001 ms): pre-commit/24368 wait4(upid: -1, stat_addr: 0x7ffc94f4f2d0, options: NOHANG) = -1 ECHILD No child processes
  55717.963 ( 0.000 ms): pre-commit/24371  ... [continued]: wait4()) = 24372
  55717.978 (21.468 ms): :24371/24371 wait4(upid: -1, stat_addr: 0x7ffc94f4f230) ...
  55718.087 ( 0.109 ms): pre-commit/24371 wait4(upid: -1, stat_addr: 0x7ffc94f4f230) = 24373 (tr)
  55718.187 ( 0.096 ms): pre-commit/24371 wait4(upid: -1, stat_addr: 0x7ffc94f4f230) = 24374 (wc)
  55718.218 ( 0.002 ms): pre-commit/24371 wait4(upid: -1, stat_addr: 0x7ffc94f4eed0, options: NOHANG) = -1 ECHILD No child processes
  55718.367 ( 0.005 ms): pre-commit/24368 wait4(upid: -1, stat_addr: 0x7ffc94f4f1d0, options: NOHANG) = 24371 (pre-commit)
  55718.369 ( 0.001 ms): pre-commit/24368 wait4(upid: -1, stat_addr: 0x7ffc94f4f1d0, options: NOHANG) = -1 ECHILD No child processes
  55741.021 (49.494 ms): git/24347  ... [continued]: wait4()) = 24368 (pre-commit)
  74146.427 (18319.601 ms): git/24347 wait4(upid: 24375 (git), stat_addr: 0x7ffe030d6824) ...
  74149.036 ( 0.891 ms): bash/24391 wait4(upid: -1, stat_addr: 0x7ffe0cee0560) = 24393 (sed)

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: http://lkml.kernel.org/n/tip-75yl9hzjhb020iadc81gdj8t@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2016-04-06 18:02:41 -03:00
parent c65f10701a
commit d1d438a3b1
2 changed files with 75 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

110
tools/perf/builtin-trace.c
View File

@ -112,6 +112,58 @@
# define PERF_FLAG_FD_CLOEXEC (1UL << 3) /* O_CLOEXEC */
#endif
struct trace {
struct perf_tool tool;
struct {
int machine;
int open_id;
} audit;
struct {
int max;
struct syscall *table;
struct {
struct perf_evsel *sys_enter,
*sys_exit;
} events;
} syscalls;
struct record_opts opts;
struct perf_evlist *evlist;
struct machine *host;
struct thread *current;
u64 base_time;
FILE *output;
unsigned long nr_events;
struct strlist *ev_qualifier;
struct {
size_t nr;
int *entries;
} ev_qualifier_ids;
struct intlist *tid_list;
struct intlist *pid_list;
struct {
size_t nr;
pid_t *entries;
} filter_pids;
double duration_filter;
double runtime_ms;
struct {
u64 vfs_getname,
proc_getname;
} stats;
bool not_ev_qualifier;
bool live;
bool full_time;
bool sched;
bool multiple_threads;
bool summary;
bool summary_only;
bool show_comm;
bool show_tool_stats;
bool trace_syscalls;
bool force;
bool vfs_getname;
int trace_pgfaults;
};
struct tp_field {
int offset;
@ -1073,6 +1125,7 @@ static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
.arg_scnprintf = { [arg] = SCA_STRARRAY, }, \
.arg_parm = { [arg] = &strarray__##array, }
#include "trace/beauty/pid.c"
#include "trace/beauty/sched_policy.c"
#include "trace/beauty/waitid_options.c"
@ -1167,6 +1220,7 @@ static struct syscall_fmt {
.arg_scnprintf = { [0] = SCA_FD, /* fd */ }, },
{ .name = "getitimer", .errmsg = true, STRARRAY(0, which, itimers), },
{ .name = "getpid", .errpid = true, },
{ .name = "getpgid", .errpid = true, },
{ .name = "getppid", .errpid = true, },
{ .name = "getrandom", .errmsg = true,
.arg_scnprintf = { [2] = SCA_GETRANDOM_FLAGS, /* flags */ }, },
@ -1328,6 +1382,7 @@ static struct syscall_fmt {
[3] = SCA_MSG_FLAGS, /* flags */ }, },
{ .name = "set_tid_address", .errpid = true, },
{ .name = "setitimer", .errmsg = true, STRARRAY(0, which, itimers), },
{ .name = "setpgid", .errmsg = true, },
{ .name = "setrlimit", .errmsg = true, STRARRAY(0, resource, rlimit_resources), },
{ .name = "setxattr", .errmsg = true,
.arg_scnprintf = { [0] = SCA_FILENAME, /* pathname */ }, },
@ -1485,59 +1540,6 @@ fail:
static const size_t trace__entry_str_size = 2048;
struct trace {
struct perf_tool tool;
struct {
int machine;
int open_id;
} audit;
struct {
int max;
struct syscall *table;
struct {
struct perf_evsel *sys_enter,
*sys_exit;
} events;
} syscalls;
struct record_opts opts;
struct perf_evlist *evlist;
struct machine *host;
struct thread *current;
u64 base_time;
FILE *output;
unsigned long nr_events;
struct strlist *ev_qualifier;
struct {
size_t nr;
int *entries;
} ev_qualifier_ids;
struct intlist *tid_list;
struct intlist *pid_list;
struct {
size_t nr;
pid_t *entries;
} filter_pids;
double duration_filter;
double runtime_ms;
struct {
u64 vfs_getname,
proc_getname;
} stats;
bool not_ev_qualifier;
bool live;
bool full_time;
bool sched;
bool multiple_threads;
bool summary;
bool summary_only;
bool show_comm;
bool show_tool_stats;
bool trace_syscalls;
bool force;
bool vfs_getname;
int trace_pgfaults;
};
static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
{
struct thread_trace *ttrace = thread__priv(thread);
@ -1763,6 +1765,8 @@ static int syscall__set_arg_fmts(struct syscall *sc)
sc->arg_scnprintf[idx] = sc->fmt->arg_scnprintf[idx];
else if (field->flags & FIELD_IS_POINTER)
sc->arg_scnprintf[idx] = syscall_arg__scnprintf_hex;
else if (strcmp(field->type, "pid_t") == 0)
sc->arg_scnprintf[idx] = SCA_PID;
++idx;
}

18
tools/perf/trace/beauty/pid.c Normal file
View File

@ -0,0 +1,18 @@
static size_t syscall_arg__scnprintf_pid(char *bf, size_t size, struct syscall_arg *arg)
{
int pid = arg->val;
struct trace *trace = arg->trace;
size_t printed = scnprintf(bf, size, "%d", pid);
struct thread *thread = machine__find_thread(trace->host, pid, pid);
if (thread != NULL) {
if (thread->comm_set)
printed += scnprintf(bf + printed, size - printed,
" (%s)", thread__comm_str(thread));
thread__put(thread);
}
return printed;
}
#define SCA_PID syscall_arg__scnprintf_pid