Commit Graph

18 Commits

Author SHA1 Message Date
mikhail.naganov@gmail.com
999e3fca90 Fix issue 553: function frame is skipped in profile when compare stub is called.
The problem appeared due to a fact that stubs doesn't create a stack
frame, reusing the stack frame of the caller function. When building
stack traces, the current function is retrieved from PC, and its
callees are retrieved by traversing the stack backwards. Thus, for
stubs, the stub itself was discovered via PC, and then stub's caller's
caller was retrieved from stack.

To fix this problem, a pointer to JSFunction object is now captured
from the topmost stack frame, and is saved into stack trace log
record. Then a simple heuristics is applied whether a referred
function should be added to decoded stack, or not, to avoid reporting
the same function twice (from PC and from the pointer.)

BUG=553
TEST=added to mjsunit/tools/tickprocessor

Review URL: http://codereview.chromium.org/546089

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3673 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2010-01-21 16:42:41 +00:00
mikhail.naganov@gmail.com
aa2c33126c TickProcessor script reimplemented in JavaScript.
This is an effort to reuse profiler data processing code both in
TickProcessor and Dev Tools Profiler. The old Python implementation
will be removed.

The new TickProcessor works almost identical to the previous one.
However, it has some differences:

1. Not very useful "Call profile" section is replaced with a new
   WebKit-like "Bottom up (heavy) profile" which shows the most
   expensive functions together with their callers. I used it
   personally in order to find and remove bottlenecks in the
   tickprocessor script itself, and found it quite helpful.

2. Code entries with duplicate names (they occur for RegExes, stubs
   and sometimes for anonymous Function objects) are now distinguished
   by adding an occurence number inside curly brackets.

3. (Address -> code entry) mapping is more precise in boundary cases.

4. Windows version no more requires specifying .map file location.

5. Works faster.

Review URL: http://codereview.chromium.org/99054

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1802 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2009-04-27 13:50:42 +00:00
mikhail.naganov@gmail.com
e88d1e475e Fixed numerous issues that were causing errors in profiler log processing
on a real web application loaded in the test shell.

Also implemented output of JSON-encoded call stacks for profiler
prototype.

Review URL: http://codereview.chromium.org/56064

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1646 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2009-03-31 09:06:37 +00:00
kmillikin@chromium.org
99ba650f71 Mark some of the places we leave V8 via callbacks as transitions to
state EXTERNAL rather than OTHER.
Review URL: http://codereview.chromium.org/55007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1632 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2009-03-27 12:32:28 +00:00
kasperl@chromium.org
fc0af92f60 Introduce splaytree.KeyNotFoundError and use it for reporting
issues when removing non-existing nodes from a SplayTree.
Review URL: http://codereview.chromium.org/42599

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1609 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2009-03-25 12:14:13 +00:00
mikhail.naganov@gmail.com
0864b2d646 Two small changes regarding GC ticks.
1) Don't try to sample the stack if VM is in 'GC' state
2) Show GC ticks in profiler statistics

Review URL: http://codereview.chromium.org/27213

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1380 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2009-02-26 15:48:32 +00:00
sgjesse@chromium.org
6ea0862592 Added ticks to the display of unknown time in the profile.
Review URL: http://codereview.chromium.org/27050

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1343 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2009-02-24 07:36:58 +00:00
sgjesse@chromium.org
f85b52615b Only account for actual time spend in call path calculation.
The call path section of the profile now starts with information on the percentage of the ticks which does not contain call path information.

Added tick count to the call path part as well.
Review URL: http://codereview.chromium.org/28022

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1338 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2009-02-23 12:18:46 +00:00
mike@belshe.com
0b4b32d9f7 add ticks to tickprocessor
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1323 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2009-02-20 01:56:08 +00:00
mikhail.naganov@gmail.com
4cc5c314d1 Profiler tick processor now counts IC ticks on behalf of a caller.
This is enabled by default. To get back to old behavior, use '--separate-ic' switch.

Review URL: http://codereview.chromium.org/21452


git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1305 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2009-02-18 16:12:40 +00:00
mikhail.naganov@gmail.com
ddd2ac4015 Refactored command-line options handling in tick processor scripts
to remove code duplications. This makes easier adding new options.

Review URL: http://codereview.chromium.org/20452


git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1300 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2009-02-18 13:45:54 +00:00
sgjesse@chromium.org
98208125cb Include all the code in code creation log events. The code object header size is now added to the size Before ticks the last instructions of a JavaScript functions ended up as unaccounted in the profile.Include ticks in the the last created code object in the profile.Show the unaccounted ticks in the profile as a percentage together with the rest. Added an option to ignore unaccounted ticks in the percentage calculation.
Review URL: http://codereview.chromium.org/21410

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1295 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2009-02-18 10:29:56 +00:00
mikhail.naganov@gmail.com
a23fd3284a Added the simplest call stack sampling and call profile in tick processor output.
Currently only two stack frames are sampled (current function and its caller).

Output of tick processor looks like this:

 [Call profile]:
   total  call path
   15.2%  LazyCompile: am3 crypto.js:108  <-  LazyCompile: montReduce crypto.js:583
    6.5%  LazyCompile: am3 crypto.js:108  <-  LazyCompile: bnpSquareTo crypto.js:431
    2.9%  Builtin: KeyedStoreIC_Generic  <-  LazyCompile: montReduce crypto.js:583
    2.3%  LazyCompile: am3 crypto.js:108  <-  LazyCompile: bnpMultiplyTo crypto.js:415

Tested under Windows, Linux and OS X.

Review URL: http://codereview.chromium.org/21403


git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1292 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2009-02-17 14:45:45 +00:00
mikhail.naganov@gmail.com
3835e915c4 Adding src_file_name:line_number into perf log entries for compiled JS functions.
Thus, instead of the following profiler records:
   1.5%    1.5%   LazyCompile: <anonymous>
we'll now have these:
   1.5%    1.5%   LazyCompile: <anonymous> richards.js:309

Basically, I translated two functions from messages.js into C++.
In the next CL I will update messages.js to use added native functions.

Review URL: http://codereview.chromium.org/19537

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1216 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2009-02-03 10:52:02 +00:00
christian.plesner.hansen@gmail.com
d7c933e7ae Added support in the profiler for creating 'regions' that cover part
of the generated code.  These can be used by the profiler to
categorize the ticks that occur within generated code and thereby show
more detailed information about where time is spent in generated code.
For instance, this is what the profiler displayed for a simple regexp
benchmark with irregexp-native before:

[JavaScript]:
   total  nonlib   name
   87.2%   87.2%   RegExp: (?:\w*\W+)*

This is what we can display now:

[JavaScript]:
   total  nonlib   name
   87.2%   87.2%   RegExp: (?:\w*\W+)*
                   -  53.0%  56.7% BranchOrBacktrack
                   -  14.9%  59.8% CheckCharacterLT
                   -  13.7%  20.4% CheckStackLimit
                   -   6.7%   6.7% SafeCall
                   -   2.7%   7.0% CheckCharacterGT
                   -   2.4%   2.4% SafeReturn
                   -   2.1%   2.1% LoadCurrentCharacter
                   -   1.8%   1.8% PushRegister
                   -   0.9%   0.9% PopRegister
                   -   0.9%   0.9% AdvanceRegister
                   -   0.3%   0.3% PopCurrentPosition
                   -   0.3%   0.3% CheckGreedyLoop
                   -   0.0%  20.4% PushBacktrack
                   -   0.0%  22.3% CheckCharacter
                   -   0.0%   2.4% IfRegisterLT


git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1010 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2008-12-19 13:12:43 +00:00
kasperl@chromium.org
8df739da6d Improve profiler output to make it easier to see the
anonymous functions.
Review URL: http://codereview.chromium.org/7075

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@486 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2008-10-10 09:26:40 +00:00
christian.plesner.hansen@gmail.com
9bed566bdb Changed copyright header from google inc. to v8 project authors.
Added presubmit step to check copyright.



git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@242 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2008-09-09 20:08:45 +00:00
ager@chromium.org
0b9c43b37b Add the profiler tick processors to the tools directory.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@123 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2008-09-03 19:15:48 +00:00