Android Booting - Revision history

http://elinux.org/index.php?title=Android_Booting&feed=atom&action=history Android Booting - Revision history 2013-05-19T20:29:39Z Revision history for this page on the wiki MediaWiki 1.21alpha http://elinux.org/index.php?title=Android_Booting&diff=154826&oldid=prev Simon Braunschmidt: /* 'init' resources */ fixed kandroid pdk link, and added info on how to reconstruct the historical PDK 2012-07-26T17:15:01Z

<p>‎<span dir="auto"><span class="autocomment">'init' resources: </span> fixed kandroid pdk link, and added info on how to reconstruct the historical PDK</span></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr style='vertical-align: top;'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 17:15, 26 July 2012</td> </tr><tr><td colspan="2" class="diff-lineno">Line 39:</td> <td colspan="2" class="diff-lineno">Line 39:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>See the [https://android.googlesource.com/platform/system/core/+/master/init/readme.txt Android init language reference]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>See the [https://android.googlesource.com/platform/system/core/+/master/init/readme.txt Android init language reference]</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>Or, see also: http://www.kandroid.org/<del class="diffchange diffchange-inline">android_pdk</del>/bring_up.html</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>Or, see also: <ins class="diffchange diffchange-inline">[</ins>http://www.kandroid.org/<ins class="diffchange diffchange-inline">online-pdk/guide</ins>/bring_up.html <ins class="diffchange diffchange-inline">kandroid copy of old Android PDK]</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">* Note that the old PDK has been retracted from where it used to found below http://source.android.com/porting</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">** You may be able to reconstruct it though:</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">*** You need a local copy of the AOSP sourcetree, and run the usual ''build/envsetup.sh'' preparation</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">*** Use ''repo init -b'' to check out the AOSP sourcetree with a tag around 2.3, then ''make sdk sdk_all''</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">*** This worked for me, though I used some tag around 4.0.4. Some links had to be fixed in the resulting html output</ins></div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>See also http://www.androidenea.com/2009/08/init-process-and-initrc.html</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>See also http://www.androidenea.com/2009/08/init-process-and-initrc.html</div></td></tr> </table>

Simon Braunschmidt http://elinux.org/index.php?title=Android_Booting&diff=154820&oldid=prev Simon Braunschmidt: fixed link, android aosp is no longer hosted on android.git.kernel.org 2012-07-26T16:58:36Z

<p>fixed link, android aosp is no longer hosted on android.git.kernel.org</p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr style='vertical-align: top;'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 16:58, 26 July 2012</td> </tr><tr><td colspan="2" class="diff-lineno">Line 37:</td> <td colspan="2" class="diff-lineno">Line 37:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>==== 'init' resources ====</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>==== 'init' resources ====</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The syntax for these .rc files is documented in a readme file in the source tree.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The syntax for these .rc files is documented in a readme file in the source tree.</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>See the [<del class="diffchange diffchange-inline">http</del>://android.<del class="diffchange diffchange-inline">git</del>.<del class="diffchange diffchange-inline">kernel.org</del>/<del class="diffchange diffchange-inline">?p=</del>platform/system/core<del class="diffchange diffchange-inline">.git;a=blob;f=</del>init/readme.txt<del class="diffchange diffchange-inline">;hb=HEAD </del>Android init language reference]</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>See the [<ins class="diffchange diffchange-inline">https</ins>://android.<ins class="diffchange diffchange-inline">googlesource</ins>.<ins class="diffchange diffchange-inline">com</ins>/platform/system/core<ins class="diffchange diffchange-inline">/+/master/</ins>init/readme.txt Android init language reference]</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Or, see also: http://www.kandroid.org/android_pdk/bring_up.html</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Or, see also: http://www.kandroid.org/android_pdk/bring_up.html</div></td></tr>  </table>

Simon Braunschmidt http://elinux.org/index.php?title=Android_Booting&diff=68767&oldid=prev Lail3344: /* Overview */ 2011-10-19T09:30:20Z

<p>‎<span dir="auto"><span class="autocomment">Overview</span></span></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr style='vertical-align: top;'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 09:30, 19 October 2011</td> </tr><tr><td colspan="2" class="diff-lineno">Line 136:</td> <td colspan="2" class="diff-lineno">Line 136:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>=== Overview ===</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>=== Overview ===</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>See "Android Initialization Process" at: http://blog.chinaunix.net/u2/85805/showart_1421736.html</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>See "Android Initialization Process" at: http://blog.chinaunix.net/u2/85805/showart_1421736.html <ins class="diffchange diffchange-inline">(this address is not work), using http://blog.chinaunix.net/space.php?uid=7788581&do=blog&id=2558375 instead.</ins></div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>=== strace ===</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>=== strace ===</div></td></tr>  </table>

Lail3344 http://elinux.org/index.php?title=Android_Booting&diff=68461&oldid=prev Tim Bird: /* Tools for analyzing Android Bootup */ 2011-10-13T23:39:26Z

<p>‎<span dir="auto"><span class="autocomment">Tools for analyzing Android Bootup</span></span></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr style='vertical-align: top;'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 23:39, 13 October 2011</td> </tr><tr><td colspan="2" class="diff-lineno">Line 109:</td> <td colspan="2" class="diff-lineno">Line 109:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>** Use -tt to get detailed timestamps for syscalls</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>** Use -tt to get detailed timestamps for syscalls</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>** Use -o to output the data to a file</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>** Use -o to output the data to a file</div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">Here is an example of using strace to follow the startup of zygote, and the apps that are forked</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">from it.</ins></div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Replace:</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Replace:</div></td></tr> <tr><td colspan="2" class="diff-lineno">Line 114:</td> <td colspan="2" class="diff-lineno">Line 117:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>with</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>with</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>  service zygote /system/xbin/strace -f -tt -o /cache/debug/boot.strace /system/bin/app_process -Xzygote /system/bin --zygote --start-system-server</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>  service zygote /system/xbin/strace -f -tt -o /cache/debug/boot.strace /system/bin/app_process -Xzygote /system/bin --zygote --start-system-server</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del style="color: red; font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2"> </td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del style="color: red; font-weight: bold; text-decoration: none;">Here is an example of using strace to follow the startup of zygote, and the apps that are forked</del></div></td><td colspan="2"> </td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del style="color: red; font-weight: bold; text-decoration: none;">from it.</del></div></td><td colspan="2"> </td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Here is some sample data:</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Here is some sample data:</div></td></tr>  </table>

Tim Bird http://elinux.org/index.php?title=Android_Booting&diff=68455&oldid=prev Tim Bird: /* Tools for analyzing Android Bootup */ 2011-10-13T23:35:55Z

<p>‎<span dir="auto"><span class="autocomment">Tools for analyzing Android Bootup</span></span></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr style='vertical-align: top;'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 23:35, 13 October 2011</td> </tr><tr><td colspan="2" class="diff-lineno">Line 99:</td> <td colspan="2" class="diff-lineno">Line 99:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>** or this: 'adb logcat -d | grep preload'</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>** or this: 'adb logcat -d | grep preload'</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>10-15 00:00:17.748 I/Zygote  (  535): ...preloaded 1873 classes in 2438ms.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> </ins>10-15 00:00:17.748 I/Zygote  (  535): ...preloaded 1873 classes in 2438ms.</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>10-15 00:00:17.764 I/Zygote  (  535): ...preloaded 0 resources in 0ms.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> </ins>10-15 00:00:17.764 I/Zygote  (  535): ...preloaded 0 resources in 0ms.</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>10-15 00:00:17.772 I/Zygote  (  535): ...preloaded 15 resources in 7ms.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> </ins>10-15 00:00:17.772 I/Zygote  (  535): ...preloaded 15 resources in 7ms.</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div> </div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div></div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* Bootchart - see [[Using Bootchart on Android]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* Bootchart - see [[Using Bootchart on Android]]</div></td></tr>  </table>

Tim Bird http://elinux.org/index.php?title=Android_Booting&diff=68449&oldid=prev Tim Bird: /* Tools for analyzing Android Bootup */ add info about strace and logcat 2011-10-13T23:35:23Z

<p>‎<span dir="auto"><span class="autocomment">Tools for analyzing Android Bootup: </span> add info about strace and logcat</span></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr style='vertical-align: top;'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 23:35, 13 October 2011</td> </tr><tr><td colspan="2" class="diff-lineno">Line 115:</td> <td colspan="2" class="diff-lineno">Line 115:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>with</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>with</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>  service zygote /system/xbin/strace -f -tt -o /cache/debug/boot.strace /system/bin/app_process -Xzygote /system/bin --zygote --start-system-server</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>  service zygote /system/xbin/strace -f -tt -o /cache/debug/boot.strace /system/bin/app_process -Xzygote /system/bin --zygote --start-system-server</div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">Here is an example of using strace to follow the startup of zygote, and the apps that are forked</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">from it.</ins></div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Here is some sample data:</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Here is some sample data:</div></td></tr>  </table>

Tim Bird http://elinux.org/index.php?title=Android_Booting&diff=68443&oldid=prev Tim Bird: /* Tools for analyzing Android Bootup */ 2011-10-13T23:34:09Z

<p>‎<span dir="auto"><span class="autocomment">Tools for analyzing Android Bootup</span></span></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr style='vertical-align: top;'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 23:34, 13 October 2011</td> </tr><tr><td colspan="2" class="diff-lineno">Line 129:</td> <td colspan="2" class="diff-lineno">Line 129:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>  571  00:00:11.660071 open("/lib/libc_sse.so", O_RDONLY) = 3</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>  571  00:00:11.660071 open("/lib/libc_sse.so", O_RDONLY) = 3</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>Please note that writing the strace data takes extra time.  For long sequences of very fast syscalls (such as when the timezone file is being read) the overhead of strace itself exaggerates the timings in the trace.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>Please note that writing the strace data takes extra time.  For long sequences of very fast syscalls (such as when the timezone file is being read) the overhead of strace itself exaggerates the timings in the trace<ins class="diffchange diffchange-inline">.  Use the timing information with caution</ins>.</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Notes on the Android startup procedure ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Notes on the Android startup procedure ==</div></td></tr>  </table>

Tim Bird http://elinux.org/index.php?title=Android_Booting&diff=68437&oldid=prev Tim Bird: /* Tools for analyzing Android Bootup */ 2011-10-13T23:33:34Z

<p>‎<span dir="auto"><span class="autocomment">Tools for analyzing Android Bootup</span></span></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr style='vertical-align: top;'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 23:33, 13 October 2011</td> </tr><tr><td colspan="2" class="diff-lineno">Line 128:</td> <td colspan="2" class="diff-lineno">Line 128:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>  571  00:00:11.659970 close(3)          = 0</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>  571  00:00:11.659970 close(3)          = 0</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>  571  00:00:11.660071 open("/lib/libc_sse.so", O_RDONLY) = 3</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>  571  00:00:11.660071 open("/lib/libc_sse.so", O_RDONLY) = 3</div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">Please note that writing the strace data takes extra time.  For long sequences of very fast syscalls (such as when the timezone file is being read) the overhead of strace itself exaggerates the timings in the trace.</ins></div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Notes on the Android startup procedure ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Notes on the Android startup procedure ==</div></td></tr>  </table>

Tim Bird http://elinux.org/index.php?title=Android_Booting&diff=68431&oldid=prev Tim Bird: /* Tools for analyzing Android Bootup */ 2011-10-13T23:32:07Z

<p>‎<span dir="auto"><span class="autocomment">Tools for analyzing Android Bootup</span></span></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr style='vertical-align: top;'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 23:32, 13 October 2011</td> </tr><tr><td colspan="2" class="diff-lineno">Line 84:</td> <td colspan="2" class="diff-lineno">Line 84:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Tools for analyzing Android Bootup ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Tools for analyzing Android Bootup ==</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* logcat - see [[Android Logging System]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* logcat - see [[Android Logging System]]</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>** try this command: 'adb logcat -d -b events | grep boot<del class="diffchange diffchange-inline">'</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>** try this command: 'adb logcat -d -b events | grep <ins class="diffchange diffchange-inline">"</ins>boot<ins class="diffchange diffchange-inline">"</ins></div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>  01-01 00:00:08.396 I/boot_progress_start(  754): 12559</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>  01-01 00:00:08.396 I/boot_progress_start(  754): 12559</div></td></tr> <tr><td colspan="2" class="diff-lineno">Line 97:</td> <td colspan="2" class="diff-lineno">Line 97:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>  01-01 00:00:49.005 I/boot_progress_ams_ready(  768): 53166</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>  01-01 00:00:49.005 I/boot_progress_ams_ready(  768): 53166</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>  01-01 00:00:52.630 I/boot_progress_enable_screen(  768): 56793</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>  01-01 00:00:52.630 I/boot_progress_enable_screen(  768): 56793</div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">** or this: 'adb logcat -d | grep preload'</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">10-15 00:00:17.748 I/Zygote  (  535): ...preloaded 1873 classes in 2438ms.</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">10-15 00:00:17.764 I/Zygote  (  535): ...preloaded 0 resources in 0ms.</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">10-15 00:00:17.772 I/Zygote  (  535): ...preloaded 15 resources in 7ms.</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* Bootchart - see [[Using Bootchart on Android]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* Bootchart - see [[Using Bootchart on Android]]</div></td></tr> <tr><td colspan="2" class="diff-lineno">Line 109:</td> <td colspan="2" class="diff-lineno">Line 115:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>with</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>with</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>  service zygote /system/xbin/strace -f -tt -o /cache/debug/boot.strace /system/bin/app_process -Xzygote /system/bin --zygote --start-system-server</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>  service zygote /system/xbin/strace -f -tt -o /cache/debug/boot.strace /system/bin/app_process -Xzygote /system/bin --zygote --start-system-server</div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">Here is some sample data:</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"> $ head boot.strace</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"> 571  00:00:11.389939 execve("/system/bin/app_process", ["/system/bin/app_process", "-Xzygote", "/system/bin", "--zygote", "--start-system-server"], [/* 15 vars */]) = 0</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"> 571  00:00:11.658878 brk(0)            = 0x804b000</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"> 571  00:00:11.659048 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x77f9a000</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"> 571  00:00:11.659169 readlink("/proc/self/exe", "/system/bin/app_process", 4096) = 23</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"> 571  00:00:11.659339 access("/etc/ld.so.preload", R_OK) = 0</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"> 571  00:00:11.659440 open("/etc/ld.so.preload", O_RDONLY) = 3</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"> 571  00:00:11.659548 fstat64(0x3, 0x7fa76650) = 0</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"> 571  00:00:11.659887 mmap2(NULL, 36, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0x77f99000</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"> 571  00:00:11.659970 close(3)          = 0</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"> 571  00:00:11.660071 open("/lib/libc_sse.so", O_RDONLY) = 3</ins></div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Notes on the Android startup procedure ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Notes on the Android startup procedure ==</div></td></tr>  </table>

Tim Bird http://elinux.org/index.php?title=Android_Booting&diff=68425&oldid=prev Tim Bird: /* Tools for analyzing Android Bootup */ 2011-10-13T23:22:48Z

<p>‎<span dir="auto"><span class="autocomment">Tools for analyzing Android Bootup</span></span></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr style='vertical-align: top;'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 23:22, 13 October 2011</td> </tr><tr><td colspan="2" class="diff-lineno">Line 83:</td> <td colspan="2" class="diff-lineno">Line 83:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Tools for analyzing Android Bootup ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Tools for analyzing Android Bootup ==</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>* logcat - see [[Android <del class="diffchange diffchange-inline">logger</del>]]</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>* logcat - see [[Android <ins class="diffchange diffchange-inline">Logging System</ins>]]</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>** try this command: 'adb logcat -d -b events | grep boot'</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>** try this command: 'adb logcat -d -b events | grep boot'</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>  </table>

Tim Bird