similar to: how to dump calling stack in Xen?

Mi Maurice, A follow up to Andy's comments: MCJIT can find line numbers for ELF files, at least in limited circumstances. I know because I broke the regression test for it while doing some cleanup recently. ;) Looking at lib/ExecutionEngine/OProfileJIT/OProfileJITEventListener.cpp, I see the line: // TODO: support line number info (similar to IntelJITEventListener.cpp) >From a glance at

I've been trying to get oprofile results for jitted code without success. I built an 3.5.0 llvm with oprofile enabled, and tested it with lli on a small test case. I built the latest oprofile from the git repository. Debugging I can see that lli is registering the listener and making the oprofile calls to the libopagent api to specify the names and address ranges of jit'd routines, and

Nicolas Thierry-Mieg, We followed your instructions to yum install oprofile-gui. We were able to install oprofile-guii.i386 0:0.9.4-15.el5.centos and oprofile.i386 0.0.9.4.15.el.5.centos. I was wondering what our next step should be. I tried ./configure --with-kernel-support with oprofile-0.9.6 and obtain a warning, a working QT not found, no GUI was built. Should we try to build

Thanks for the info. I am using old JIT. So that should not be a problem. I will take a look at using oprofile. I have never used it - so will be somewhat of a learning curve. I notice that the configure script has a --with-oprofile option. In addition to enabling that, is there something else that also needs to be done? My copy of LLVM is compiled with --enable-optimized. Will --with-oprofile

I am rebasing Fedora rawhide oprofile package to oprofile-0.9.7. The xenoprof patches on http://xenoprof.sourceforge.net/#download look a bit dated. The newest version is for oprofile-0.9.5. I massaged the patch oprofile-0.9.5-xen.patch to apply to oprofile-.0.9.7. Attached is that updated patch. Does this look reasonable? Is there a desire to get this into upstream oprofile? Or should the

Keir, The following 3 patches allow HVM (SVM and VT) guests to be passively profiled using the very latest patches from Renato. These patches apply to 11470. Renato''s patches: http://xenoprof/sourceforge.net oprofile-0.9.1-xen-r2.patch And also a patch not posted FAIK (oprofile-0.9.1-fix-hvm-addr-overlap.patch) which is in the attached tar.bz2 file. hvm_xenoprofile_1.patch - The first

Hi Priyendra, There is support for oprofile and Intel(r) VTune(tm) Performance Analyzer, but either one needs to be explicitly turned on during the build process. If you use MCJIT (as opposed to the older JIT) then oprofile support isn't in place yet. Both of these work by providing a JITEventListener that receives notification when new code is emitted and hooks it up to the profiling tool

Hi I am trying to use oprofile with centos 6.0. I know that the debug-info for the kernel is not available, so I believe I used the correct switches to account for this. here is my script... # reset everything opcontrol --shutdown rm /root/.oprofile/da* opcontrol --separate=kernel --no-vmlinux opcontrol --event=CPU_CLK_UNHALTED:100000 opcontrol --start sleep 5

Helps if I send it to the list.... On Tue, Sep 1, 2009 at 5:33 PM, Giridhar S<thisisgiri at gmail.com> wrote: > Oprofile for Linux is a pretty good alternative. > (http://oprofile.sourceforge.net/about/) > > It uses hardware performance counters to collect profiling information > and therefore has very low overhead, whereas Valgrind performs dynamic > binary

Hi, I want to use xenoprof to profile the overhead of the hypervisor. I patched the oprofile-0.9.5 using the patch from xenoprof.sourceforge.net Debian GNU/Linux 5.0 (lenny) Xen-4.0.1 + 2.6.32.27 (linux-2.6-pvops.git) Dom0 My platform is Intel(R) Core(TM) i7 CPU 960 @ 3.20GHz My problems are: In Dom0, But hardware performance counters don''t be mounted after initialization

Hi, I want to use xenoprof to profile the overhead of the hypervisor. I patched the oprofile-0.9.5 using the patch from xenoprof.sourceforge.net Debian GNU/Linux 5.0 (lenny) Xen-4.0.1 + 2.6.32.27 (linux-2.6-pvops.git) Dom0 My platform is Intel(R) Core(TM) i7 CPU 960 @ 3.20GHz My problems are: In Dom0, But hardware performance counters don''t be mounted after initialization

Hi I am using oprofile 0.9.3 on xen cs 16540 on an Intel system. When I look at the top "hot" functions, I see p2m_change_type being one of the top function in xen-syms. This function is only in the svm (AMD) code and should not appear on an Intel system. I see that this function is not being clled at all when I am running my apps as I have put printk in the functions and they do

I intend to use this to support oprofile's ability to symbolize JITted code through the interface described at http://oprofile.sourceforge.net/doc/devel/jit-interface.html. I believe the interface will also be useful for gdb support. I'm considering adding some flags to the JITEventListener to let the JIT avoid collecting information no listener is going to use, but I won't do that

Hi Renato, This patch is to add Xenoprof passive domain support in SMP environment. Basically: - It allocates per vcpu buffers for passive domain and maps them into primary domain''s space. - When primary domain gets sampled and triggers virq, its kernel module will handle passive domain'' samples besides its owns. There is potential buffer overflow if passive is very busy while

Hi Keir: It has been brought to my attention that modular oprofile is broken because it now calls get_vm_area which is not an exported function. This appears to be the result of the changeset that removed vm_map_xen_pages which was only used by oprofile. So we either need to export get_vm_area in Xen, or put that function back. What do you think about this? Thanks, -- Visit Openswan at

Ack, sorry. I should have sent this to llvm-commits instead. :-P Followups there please. On Wed, Jun 24, 2009 at 12:02 PM, Jeffrey Yasskin<jyasskin at google.com> wrote: > I intend to use this to support oprofile's ability to symbolize JITted > code through the interface described at > http://oprofile.sourceforge.net/doc/devel/jit-interface.html. I > believe the interface

Catching up on post-holiday emails. I may have comments on the more general stuff later, but wanted to respond to this bit more quickly. On Nov 22, 2012, at 3:05 AM, Chandler Carruth <chandlerc at google.com> wrote: > On Thu, Nov 22, 2012 at 1:53 AM, NAKAMURA Takumi <geek4civic at gmail.com> wrote: >> s/ExecutionEngine/EE/ (or something like buzzword!) > > I don't

Hi Jeffrey, This looks very good. Thanks. Some comments: +/// JitSymbolEntry - Each function that is JIT compiled results in one of these +/// being added to an array of symbols. This indicates the name of the function +/// as well as the address range it occupies. This allows the client to map +/// from a PC value to the name of the function. +struct JitSymbolEntry { A nitpick. Please

Hi , I am getting following error when i try to run xenoprof /usr/local/bin/opcontrol: line 1082: echo: write error: Invalid argument Using 2.6+ OProfile kernel interface. Reading module info. Using log file /var/lib/oprofile/oprofiled.log Daemon started. what is this write error ? Any help is really appreciated. -John _______________________________________________ Xen-users mailing list