Merge branch 'perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux-2.6 into perf/urgent

This commit is contained in:
Ingo Molnar 2010-10-27 08:25:15 +02:00
commit e25804a032
10 changed files with 93 additions and 10 deletions

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@ -83,6 +83,10 @@ OPTIONS
--call-graph::
Do call-graph (stack chain/backtrace) recording.
-q::
--quiet::
Don't print any message, useful for scripting.
-v::
--verbose::
Be more verbose (show counter open errors, etc).

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@ -353,7 +353,7 @@ try_again:
}
if (read(fd[nr_cpu][counter][thread_index], &read_data, sizeof(read_data)) == -1) {
perror("Unable to read perf file descriptor\n");
perror("Unable to read perf file descriptor");
exit(-1);
}
@ -626,7 +626,7 @@ static int __cmd_record(int argc, const char **argv)
nr_cpus = read_cpu_map(cpu_list);
if (nr_cpus < 1) {
perror("failed to collect number of CPUs\n");
perror("failed to collect number of CPUs");
return -1;
}
@ -761,6 +761,9 @@ static int __cmd_record(int argc, const char **argv)
}
}
if (quiet)
return 0;
fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking);
/*
@ -820,6 +823,7 @@ static const struct option options[] = {
"do call-graph (stack chain/backtrace) recording"),
OPT_INCR('v', "verbose", &verbose,
"be more verbose (show counter open errors, etc)"),
OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"),
OPT_BOOLEAN('s', "stat", &inherit_stat,
"per thread counts"),
OPT_BOOLEAN('d', "data", &sample_address,

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@ -625,12 +625,13 @@ int cmd_trace(int argc, const char **argv, const char *prefix __used)
dup2(live_pipe[1], 1);
close(live_pipe[0]);
__argv = malloc(5 * sizeof(const char *));
__argv = malloc(6 * sizeof(const char *));
__argv[0] = "/bin/sh";
__argv[1] = record_script_path;
__argv[2] = "-o";
__argv[3] = "-";
__argv[4] = NULL;
__argv[2] = "-q";
__argv[3] = "-o";
__argv[4] = "-";
__argv[5] = NULL;
execvp("/bin/sh", (char **)__argv);
exit(-1);

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@ -8,6 +8,12 @@
import errno, os
FUTEX_WAIT = 0
FUTEX_WAKE = 1
FUTEX_PRIVATE_FLAG = 128
FUTEX_CLOCK_REALTIME = 256
FUTEX_CMD_MASK = ~(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME)
NSECS_PER_SEC = 1000000000
def avg(total, n):
@ -26,6 +32,18 @@ def nsecs_str(nsecs):
str = "%5u.%09u" % (nsecs_secs(nsecs), nsecs_nsecs(nsecs)),
return str
def add_stats(dict, key, value):
if not dict.has_key(key):
dict[key] = (value, value, value, 1)
else:
min, max, avg, count = dict[key]
if value < min:
min = value
if value > max:
max = value
avg = (avg + value) / 2
dict[key] = (min, max, avg, count + 1)
def clear_term():
print("\x1b[H\x1b[2J")

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@ -0,0 +1,2 @@
#!/bin/bash
perf record -a -e syscalls:sys_enter_futex -e syscalls:sys_exit_futex $@

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@ -0,0 +1,4 @@
#!/bin/bash
# description: futext contention measurement
perf trace $@ -s "$PERF_EXEC_PATH"/scripts/python/futex-contention.py

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@ -0,0 +1,50 @@
# futex contention
# (c) 2010, Arnaldo Carvalho de Melo <acme@redhat.com>
# Licensed under the terms of the GNU GPL License version 2
#
# Translation of:
#
# http://sourceware.org/systemtap/wiki/WSFutexContention
#
# to perf python scripting.
#
# Measures futex contention
import os, sys
sys.path.append(os.environ['PERF_EXEC_PATH'] + '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
from Util import *
process_names = {}
thread_thislock = {}
thread_blocktime = {}
lock_waits = {} # long-lived stats on (tid,lock) blockage elapsed time
process_names = {} # long-lived pid-to-execname mapping
def syscalls__sys_enter_futex(event, ctxt, cpu, s, ns, tid, comm,
nr, uaddr, op, val, utime, uaddr2, val3):
cmd = op & FUTEX_CMD_MASK
if cmd != FUTEX_WAIT:
return # we don't care about originators of WAKE events
process_names[tid] = comm
thread_thislock[tid] = uaddr
thread_blocktime[tid] = nsecs(s, ns)
def syscalls__sys_exit_futex(event, ctxt, cpu, s, ns, tid, comm,
nr, ret):
if thread_blocktime.has_key(tid):
elapsed = nsecs(s, ns) - thread_blocktime[tid]
add_stats(lock_waits, (tid, thread_thislock[tid]), elapsed)
del thread_blocktime[tid]
del thread_thislock[tid]
def trace_begin():
print "Press control+C to stop and show the summary"
def trace_end():
for (tid, lock) in lock_waits:
min, max, avg, count = lock_waits[tid, lock]
print "%s[%d] lock %x contended %d times, %d avg ns" % \
(process_names[tid], tid, lock, count, avg)

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@ -17,7 +17,7 @@ from perf_trace_context import *
from Core import *
from Util import *
usage = "perf trace -s syscall-counts.py [comm] [interval]\n";
usage = "perf trace -s sctop.py [comm] [interval]\n";
for_comm = None
default_interval = 3

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@ -12,8 +12,8 @@
#include "debug.h"
#include "util.h"
int verbose = 0;
bool dump_trace = false;
int verbose;
bool dump_trace = false, quiet = false;
int eprintf(int level, const char *fmt, ...)
{

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@ -6,7 +6,7 @@
#include "event.h"
extern int verbose;
extern bool dump_trace;
extern bool quiet, dump_trace;
int dump_printf(const char *fmt, ...) __attribute__((format(printf, 1, 2)));
void trace_event(event_t *event);