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This new option will allow to output function information in the same format as addr2line from binutils emits: ... 0xABCDEF01 T function_name_is_here ... This feature is useful to profile the code when it is run in JIT by external tools like valgrind and google-perftools. For example, google-perftools runs addr2line on executable and uses the resulting file to resolve memory addresses to function names. In case of LLVM JIT the resulting from --jit-emit-debug-addr2line option addr2line-formatted file can be just appended to the original addr2line file to allow...

...-emit-debug-function-range) will allow to output function information for memory ranges that functions occupy in memory while they run in JIT. File format generated is like this: ... 0x5000000 0x5001000 function_name_is_here ... This feature is useful for external tools like valgrind and google-perftools to profile the code when it is run in JIT. Particularly google-perftools will have a special option (--external_symbols) that will be able to import this file. Note: to be useful this flag should be used with -disable-fp-elim to generate standard prologs. Thank you, Yuri -------------- next...

I have this problem: google-perftools fails to detect stack for the code run under JIT called through C++ api from my program. It shows in profile like all program is one block with the name _init. I clearly do set the option NoFramePointerElim and I do see how it makes a difference in stack frame under gdb. When running some code...

...ccess?contribId=8&sessionId=1&resId=1&materialId=slides&confId=106641 On Wed, Feb 9, 2011 at 12:41 PM, Chris Jones <christopher.rob.jones at cern.ch> wrote: > > I would say a bug in tcmalloc, not SL or RHEL. See for instance > > <http://code.google.com/p/google-perftools/issues/detail?id=305> > > The fix is to move to google perftools 1.7 </quote> Because of a problem with not running the current BIND release a couple of weeks ago, I would like to ask: a) is RedHat likely to choose to backport the fix to 1.6 or will it adopt 1.7 or leave as is un...

I am trying to run some code allocating a lot of memory and not releasing it in JIT under google-perftools. Just one function 'main' calling 'malloc'. google-perftools fails to correctly read stack when malloc is called from inside the JITted code, and as a result perftools report is wrong: address of 'main' procedure appears shifted 0x3946e1d0->0x3946e1ed and is not alig...

Have you found http://llvm.org/docs/DebuggingJITedCode.html? The JIT already has support for something like this for gdb's benefit. Perftools and valgrind just don't know how to find it yet. On Sat, Jun 19, 2010 at 2:03 PM, Yuri <yuri at rawbw.com> wrote: > This new option (--jit-emit-debug-function-range) will allow to output > function information for memory ranges that functions occupy in memory while > they run i...

On Jun 18, 2010, at 3:29 AM, Yuri wrote: > Now I see that JITted code doesn't have standard prolog, on x86 each > procedure instead begins with 'sub $0x4,%esp'. > > Is there an option to make JIT generate regular prologs? Try turning off frame pointer elimination. On the llc command line, this is -disable-fp-elim -Chris > > Yuri >

On Sat, Jun 19, 2010 at 4:35 AM, Chris Lattner <clattner at apple.com> wrote: > > On Jun 18, 2010, at 3:29 AM, Yuri wrote: > >> Now I see that JITted code doesn't have standard prolog, on x86 each >> procedure instead begins with 'sub    $0x4,%esp'. >> >> Is there an option to make JIT generate regular prologs? > > Try turning off frame

Now I see that JITted code doesn't have standard prolog, on x86 each procedure instead begins with 'sub $0x4,%esp'. Is there an option to make JIT generate regular prologs? Yuri

...ething like this for gdb's benefit Yes, I saw it and tried it. -jit-emit-debug generates ELF image in memory with debug info. Another option -jit-emit-debug-to-disk creates .o ELF files with debug info, one per function. If there are thousands of functions there will be thousands of files. perftools can't use the first option, since it only collects stack address information during the run. And it would be very difficult/impractical to list all (thousands) of the resulting .o files into pprof's command line. Same with valgrind and very slow to load them since pprof runs addr2line...

On Thu, Feb 10, 2011 at 11:31 AM, Kai Schaetzl <maillists at conactive.com> wrote: > > This wasn't the first instance. This guy has recently started a habit of > copying mails (that are not his own it seems) that trip him off right to > this list. That is bad practice. I do not want to get more of this. > > Kai Kai, as you may not already know, Will Rogers said

...to output > function information for memory ranges that functions occupy in memory > while they run in JIT. File format generated is like this: > ... > 0x5000000 0x5001000 function_name_is_here > ... > > This feature is useful for external tools like valgrind and > google-perftools to profile the code when it is run in JIT. > Particularly google-perftools will have a special option > (--external_symbols) that will be able to import this file. > > Note: to be useful this flag should be used with -disable-fp-elim to > generate standard prologs. > > Than...

I'm asking here, rather than R-devel, because it seems to be a Linux specific question and because I'm using Ubuntu-9.04. I'm trying to profile an package, and got errors, so I decided to follow BDR's (http://tolstoy.newcastle.edu.au/R/devel/06/02/4254.html) example exactly, and got same problem. Can anyone replicate? $ sudo mkdir -p /var/tmp//usr/lib/R/library/stats/libs $

Is anybody using the google heap profiler to analyze clang/llvm ?? http://google-perftools.googlecode.com/svn/trunk/doc/heapprofile.html If so, do you know how to modify the build scripts to enable that. Tia. Reed

On 11/11/2011 11:39 AM, Chandler Carruth wrote: > On Fri, Nov 11, 2011 at 11:36 AM, reed kotler <rkotler at mips.com > <mailto:rkotler at mips.com>> wrote: > > Is anybody using the google heap profiler to analyze clang/llvm ?? > > http://google-perftools.googlecode.com/svn/trunk/doc/heapprofile.html > > If so, do you know how to modify the build scripts to enable that. > > Tia. > > > I have tried to use this in the past without terribly much success. > Instead, I usually use Valgrind to analyze the allocation patte...

...nd after the optimizations, but the process has to be automatized so if there is no code that can do this now then I guess it will be too hard to come up with good heuristics for comparing the code with respect to execution performance. My current approach would be to use a profiler, such as google-perftools, but the information acquired suffers from some inaccuracy. However I would like to hear your take on it and maybe if I should implement the measurement mechanism in an interpreter (lli) that uses a high resolution timer for entering and exiting functions. But it depends on if the performance of t...

...> Can prof report time for a function including things it calls? callgraph? Attached is a profile the output of "perf report -g" with callgraph info. I'm no perf expert, either, but slowly learning more as I go along... Btw, I tried google-pprof (from the Debian stable google-perftools 2.7-1 package) and couldn't figure it out... Even the example from the manpage: `google-pprof /bin/ls ls.prof` didn't seem to work. It tried to open an invalid URL with curl 'http://ls.prof/pprof/profile?seconds=30' ... *shrug*

On Fri, Nov 11, 2011 at 11:36 AM, reed kotler <rkotler at mips.com> wrote: > Is anybody using the google heap profiler to analyze clang/llvm ?? > > http://google-perftools.googlecode.com/svn/trunk/doc/heapprofile.html > > If so, do you know how to modify the build scripts to enable that. > > Tia. I have tried to use this in the past without terribly much success. Instead, I usually use Valgrind to analyze the allocation patterns: http://valgrind.org/do...

...rmation for memory ranges that functions occupy in memory >> while they run in JIT. File format generated is like this: >> ... >> 0x5000000 0x5001000 function_name_is_here >> ... >> >> This feature is useful for external tools like valgrind and >> google-perftools to profile the code when it is run in JIT. >> Particularly google-perftools will have a special option >> (--external_symbols) that will be able to import this file. >> >> Note: to be useful this flag should be used with -disable-fp-elim to >> generate standard pr...

Is there a way to install devtoolset packages without the bloat of eclipse? I just want the new compiler and toolchain, not a big IDE. BTW devtoolset-3 dependencies are broken in yum with C6 yum install devtoolset-3 ... ---> Package devtoolset-3-perftools.x86_64 0:3.1-12.el6 will be installed --> Processing Dependency: devtoolset-3-dyninst for package: devtoolset-3-perftools-3.1-12.el6.x86_64 --> Finished Dependency Resolution Error: Package: 1:devtoolset-3-eclipse-platform-4.4.2-4.bootstrap2.el6.x86_64 (centos-sclo-rh) Requires: d...