Merge branch 'master' of https://googleplex-android.googlesource.com/a/platform/frameworks/native
This commit is contained in:
commit
6ce1093b8e
12
atrace/Android.mk
Normal file
12
atrace/Android.mk
Normal file
@ -0,0 +1,12 @@
|
||||
# Copyright 2012 The Android Open Source Project
|
||||
|
||||
LOCAL_PATH:= $(call my-dir)
|
||||
include $(CLEAR_VARS)
|
||||
|
||||
LOCAL_SRC_FILES:= atrace.c
|
||||
|
||||
LOCAL_MODULE:= atrace
|
||||
|
||||
LOCAL_MODULE_TAGS:= optional
|
||||
|
||||
include $(BUILD_EXECUTABLE)
|
0
atrace/MODULE_LICENSE_APACHE2
Normal file
0
atrace/MODULE_LICENSE_APACHE2
Normal file
190
atrace/NOTICE
Normal file
190
atrace/NOTICE
Normal file
@ -0,0 +1,190 @@
|
||||
|
||||
Copyright (c) 2012, The Android Open Source Project
|
||||
|
||||
Licensed under the Apache License, Version 2.0 (the "License");
|
||||
you may not use this file except in compliance with the License.
|
||||
|
||||
Unless required by applicable law or agreed to in writing, software
|
||||
distributed under the License is distributed on an "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
See the License for the specific language governing permissions and
|
||||
limitations under the License.
|
||||
|
||||
|
||||
Apache License
|
||||
Version 2.0, January 2004
|
||||
http://www.apache.org/licenses/
|
||||
|
||||
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
|
||||
|
||||
1. Definitions.
|
||||
|
||||
"License" shall mean the terms and conditions for use, reproduction,
|
||||
and distribution as defined by Sections 1 through 9 of this document.
|
||||
|
||||
"Licensor" shall mean the copyright owner or entity authorized by
|
||||
the copyright owner that is granting the License.
|
||||
|
||||
"Legal Entity" shall mean the union of the acting entity and all
|
||||
other entities that control, are controlled by, or are under common
|
||||
control with that entity. For the purposes of this definition,
|
||||
"control" means (i) the power, direct or indirect, to cause the
|
||||
direction or management of such entity, whether by contract or
|
||||
otherwise, or (ii) ownership of fifty percent (50%) or more of the
|
||||
outstanding shares, or (iii) beneficial ownership of such entity.
|
||||
|
||||
"You" (or "Your") shall mean an individual or Legal Entity
|
||||
exercising permissions granted by this License.
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|
||||
"Source" form shall mean the preferred form for making modifications,
|
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|
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|
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"Object" form shall mean any form resulting from mechanical
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and conversions to other media types.
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|
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"Work" shall mean the work of authorship, whether in Source or
|
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|
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"Derivative Works" shall mean any work, whether in Source or Object
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"Contribution" shall mean any work of authorship, including
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2. Grant of Copyright License. Subject to the terms and conditions of
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4. Redistribution. You may reproduce and distribute copies of the
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meet the following conditions:
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(a) You must give any other recipients of the Work or
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Derivative Works a copy of this License; and
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|
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(b) You must cause any modified files to carry prominent notices
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stating that You changed the files; and
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(c) You must retain, in the Source form of any Derivative Works
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excluding those notices that do not pertain to any part of
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|
||||
(d) If the Work includes a "NOTICE" text file as part of its
|
||||
distribution, then any Derivative Works that You distribute must
|
||||
include a readable copy of the attribution notices contained
|
||||
within such NOTICE file, excluding those notices that do not
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pertain to any part of the Derivative Works, in at least one
|
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of the NOTICE file are for informational purposes only and
|
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do not modify the License. You may add Your own attribution
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notices within Derivative Works that You distribute, alongside
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or as an addendum to the NOTICE text from the Work, provided
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that such additional attribution notices cannot be construed
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as modifying the License.
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||||
You may add Your own copyright statement to Your modifications and
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may provide additional or different license terms and conditions
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||||
for use, reproduction, or distribution of Your modifications, or
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for any such Derivative Works as a whole, provided Your use,
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reproduction, and distribution of the Work otherwise complies with
|
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the conditions stated in this License.
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|
||||
5. Submission of Contributions. Unless You explicitly state otherwise,
|
||||
any Contribution intentionally submitted for inclusion in the Work
|
||||
by You to the Licensor shall be under the terms and conditions of
|
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this License, without any additional terms or conditions.
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Notwithstanding the above, nothing herein shall supersede or modify
|
||||
the terms of any separate license agreement you may have executed
|
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with Licensor regarding such Contributions.
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|
||||
6. Trademarks. This License does not grant permission to use the trade
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names, trademarks, service marks, or product names of the Licensor,
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except as required for reasonable and customary use in describing the
|
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origin of the Work and reproducing the content of the NOTICE file.
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7. Disclaimer of Warranty. Unless required by applicable law or
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agreed to in writing, Licensor provides the Work (and each
|
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Contributor provides its Contributions) on an "AS IS" BASIS,
|
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
|
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implied, including, without limitation, any warranties or conditions
|
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of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
|
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PARTICULAR PURPOSE. You are solely responsible for determining the
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8. Limitation of Liability. In no event and under no legal theory,
|
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whether in tort (including negligence), contract, or otherwise,
|
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unless required by applicable law (such as deliberate and grossly
|
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negligent acts) or agreed to in writing, shall any Contributor be
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9. Accepting Warranty or Additional Liability. While redistributing
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of your accepting any such warranty or additional liability.
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||||
END OF TERMS AND CONDITIONS
|
||||
|
304
atrace/atrace.c
Normal file
304
atrace/atrace.c
Normal file
@ -0,0 +1,304 @@
|
||||
/*
|
||||
* Copyright (C) 2012 The Android Open Source Project
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
|
||||
#include <errno.h>
|
||||
#include <fcntl.h>
|
||||
#include <signal.h>
|
||||
#include <stdarg.h>
|
||||
#include <stdbool.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <sys/sendfile.h>
|
||||
#include <time.h>
|
||||
|
||||
/* Command line options */
|
||||
static int g_traceDurationSeconds = 5;
|
||||
static bool g_traceSchedSwitch = false;
|
||||
static bool g_traceWorkqueue = false;
|
||||
static bool g_traceOverwrite = false;
|
||||
|
||||
/* Global state */
|
||||
static bool g_traceAborted = false;
|
||||
|
||||
/* Sys file paths */
|
||||
static const char* k_traceClockPath =
|
||||
"/sys/kernel/debug/tracing/trace_clock";
|
||||
|
||||
static const char* k_tracingOverwriteEnablePath =
|
||||
"/sys/kernel/debug/tracing/options/overwrite";
|
||||
|
||||
static const char* k_schedSwitchEnablePath =
|
||||
"/sys/kernel/debug/tracing/events/sched/sched_switch/enable";
|
||||
|
||||
static const char* k_workqueueEnablePath =
|
||||
"/sys/kernel/debug/tracing/events/workqueue/enable";
|
||||
|
||||
static const char* k_tracingOnPath =
|
||||
"/sys/kernel/debug/tracing/tracing_on";
|
||||
|
||||
static const char* k_tracePath =
|
||||
"/sys/kernel/debug/tracing/trace";
|
||||
|
||||
static const char* k_traceMarkerPath =
|
||||
"/sys/kernel/debug/tracing/trace_marker";
|
||||
|
||||
// Write a string to a file, returning true if the write was successful.
|
||||
bool writeStr(const char* filename, const char* str)
|
||||
{
|
||||
int fd = open(filename, O_WRONLY);
|
||||
if (fd == -1) {
|
||||
fprintf(stderr, "error opening %s: %s (%d)\n", filename,
|
||||
strerror(errno), errno);
|
||||
return false;
|
||||
}
|
||||
|
||||
bool ok = true;
|
||||
ssize_t len = strlen(str);
|
||||
if (write(fd, str, len) != len) {
|
||||
fprintf(stderr, "error writing to %s: %s (%d)\n", filename,
|
||||
strerror(errno), errno);
|
||||
ok = false;
|
||||
}
|
||||
|
||||
close(fd);
|
||||
|
||||
return ok;
|
||||
}
|
||||
|
||||
// Enable or disable a kernel option by writing a "1" or a "0" into a /sys file.
|
||||
static bool setKernelOptionEnable(const char* filename, bool enable)
|
||||
{
|
||||
return writeStr(filename, enable ? "1" : "0");
|
||||
}
|
||||
|
||||
// Enable or disable overwriting of the kernel trace buffers. Disabling this
|
||||
// will cause tracing to stop once the trace buffers have filled up.
|
||||
static bool setTraceOverwriteEnable(bool enable)
|
||||
{
|
||||
return setKernelOptionEnable(k_tracingOverwriteEnablePath, enable);
|
||||
}
|
||||
|
||||
// Enable or disable tracing of the kernel scheduler switching.
|
||||
static bool setSchedSwitchTracingEnable(bool enable)
|
||||
{
|
||||
return setKernelOptionEnable(k_schedSwitchEnablePath, enable);
|
||||
}
|
||||
|
||||
// Enable or disable tracing of the kernel workqueues.
|
||||
static bool setWorkqueueTracingEnabled(bool enable)
|
||||
{
|
||||
return setKernelOptionEnable(k_workqueueEnablePath, enable);
|
||||
}
|
||||
|
||||
// Enable or disable kernel tracing.
|
||||
static bool setTracingEnabled(bool enable)
|
||||
{
|
||||
return setKernelOptionEnable(k_tracingOnPath, enable);
|
||||
}
|
||||
|
||||
// Clear the contents of the kernel trace.
|
||||
static bool clearTrace()
|
||||
{
|
||||
int traceFD = creat(k_tracePath, 0);
|
||||
if (traceFD == -1) {
|
||||
fprintf(stderr, "error truncating %s: %s (%d)\n", k_tracePath,
|
||||
strerror(errno), errno);
|
||||
return false;
|
||||
}
|
||||
|
||||
close(traceFD);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
// Enable or disable the kernel's use of the global clock. Disabling the global
|
||||
// clock will result in the kernel using a per-CPU local clock.
|
||||
static bool setGlobalClockEnable(bool enable)
|
||||
{
|
||||
return writeStr(k_traceClockPath, enable ? "global" : "local");
|
||||
}
|
||||
|
||||
// Enable tracing in the kernel.
|
||||
static bool startTrace()
|
||||
{
|
||||
bool ok = true;
|
||||
|
||||
// Set up the tracing options.
|
||||
ok &= setTraceOverwriteEnable(g_traceOverwrite);
|
||||
ok &= setSchedSwitchTracingEnable(g_traceSchedSwitch);
|
||||
ok &= setWorkqueueTracingEnabled(g_traceWorkqueue);
|
||||
ok &= setGlobalClockEnable(true);
|
||||
|
||||
// Enable tracing.
|
||||
ok &= setTracingEnabled(true);
|
||||
|
||||
if (!ok) {
|
||||
fprintf(stderr, "error: unable to start trace\n");
|
||||
}
|
||||
|
||||
return ok;
|
||||
}
|
||||
|
||||
// Disable tracing in the kernel.
|
||||
static void stopTrace()
|
||||
{
|
||||
// Disable tracing.
|
||||
setTracingEnabled(false);
|
||||
|
||||
// Set the options back to their defaults.
|
||||
setTraceOverwriteEnable(true);
|
||||
setSchedSwitchTracingEnable(false);
|
||||
setWorkqueueTracingEnabled(false);
|
||||
setGlobalClockEnable(false);
|
||||
}
|
||||
|
||||
// Read the current kernel trace and write it to stdout.
|
||||
static void dumpTrace()
|
||||
{
|
||||
int traceFD = open(k_tracePath, O_RDWR);
|
||||
if (traceFD == -1) {
|
||||
fprintf(stderr, "error opening %s: %s (%d)\n", k_tracePath,
|
||||
strerror(errno), errno);
|
||||
return;
|
||||
}
|
||||
|
||||
ssize_t sent = 0;
|
||||
while ((sent = sendfile(STDOUT_FILENO, traceFD, NULL, 64*1024*1024)) > 0);
|
||||
if (sent == -1) {
|
||||
fprintf(stderr, "error dumping trace: %s (%d)\n", strerror(errno),
|
||||
errno);
|
||||
}
|
||||
|
||||
close(traceFD);
|
||||
}
|
||||
|
||||
// Print the command usage help to stderr.
|
||||
static void showHelp(const char *cmd)
|
||||
{
|
||||
fprintf(stderr, "usage: %s [options]\n", cmd);
|
||||
fprintf(stderr, "options include:\n"
|
||||
" -c trace into a circular buffer\n"
|
||||
" -s trace the kernel scheduler switches\n"
|
||||
" -t N trace for N seconds [defualt 5]\n"
|
||||
" -w trace the kernel workqueue\n");
|
||||
}
|
||||
|
||||
static void handleSignal(int signo) {
|
||||
g_traceAborted = true;
|
||||
}
|
||||
|
||||
static void registerSigHandler() {
|
||||
struct sigaction sa;
|
||||
sigemptyset(&sa.sa_mask);
|
||||
sa.sa_flags = 0;
|
||||
sa.sa_handler = handleSignal;
|
||||
sigaction(SIGHUP, &sa, NULL);
|
||||
sigaction(SIGINT, &sa, NULL);
|
||||
sigaction(SIGQUIT, &sa, NULL);
|
||||
sigaction(SIGTERM, &sa, NULL);
|
||||
}
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
if (argc == 2 && 0 == strcmp(argv[1], "--help")) {
|
||||
showHelp(argv[0]);
|
||||
exit(0);
|
||||
}
|
||||
|
||||
if (getuid() != 0) {
|
||||
fprintf(stderr, "error: %s must be run as root.", argv[0]);
|
||||
}
|
||||
|
||||
for (;;) {
|
||||
int ret;
|
||||
|
||||
ret = getopt(argc, argv, "cst:w");
|
||||
|
||||
if (ret < 0) {
|
||||
break;
|
||||
}
|
||||
|
||||
switch(ret) {
|
||||
case 'c':
|
||||
g_traceOverwrite = true;
|
||||
break;
|
||||
|
||||
case 's':
|
||||
g_traceSchedSwitch = true;
|
||||
break;
|
||||
|
||||
case 't':
|
||||
g_traceDurationSeconds = atoi(optarg);
|
||||
break;
|
||||
|
||||
case 'w':
|
||||
g_traceWorkqueue = true;
|
||||
break;
|
||||
|
||||
default:
|
||||
showHelp(argv[0]);
|
||||
exit(-1);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
registerSigHandler();
|
||||
|
||||
bool ok = startTrace();
|
||||
|
||||
if (ok) {
|
||||
printf("capturing trace...");
|
||||
fflush(stdout);
|
||||
|
||||
// We clear the trace after starting it because tracing gets enabled for
|
||||
// each CPU individually in the kernel. Having the beginning of the trace
|
||||
// contain entries from only one CPU can cause "begin" entries without a
|
||||
// matching "end" entry to show up if a task gets migrated from one CPU to
|
||||
// another.
|
||||
ok = clearTrace();
|
||||
|
||||
if (ok) {
|
||||
// Sleep to allow the trace to be captured.
|
||||
struct timespec timeLeft;
|
||||
timeLeft.tv_sec = g_traceDurationSeconds;
|
||||
timeLeft.tv_nsec = 0;
|
||||
do {
|
||||
if (g_traceAborted) {
|
||||
break;
|
||||
}
|
||||
} while (nanosleep(&timeLeft, &timeLeft) == -1 && errno == EINTR);
|
||||
}
|
||||
}
|
||||
|
||||
// Stop the trace and restore the default settings.
|
||||
stopTrace();
|
||||
|
||||
if (ok) {
|
||||
if (!g_traceAborted) {
|
||||
printf(" done\nTRACE:\n");
|
||||
fflush(stdout);
|
||||
dumpTrace();
|
||||
} else {
|
||||
printf("\ntrace aborted.\n");
|
||||
fflush(stdout);
|
||||
}
|
||||
clearTrace();
|
||||
} else {
|
||||
fprintf(stderr, "unable to start tracing\n");
|
||||
}
|
||||
|
||||
return g_traceAborted ? 1 : 0;
|
||||
}
|
Loading…
Reference in New Issue
Block a user