similar to: [LLVMdev] [Fwd: Re: A simulation tool]

Hello everybody, I am looking for a tool (in Linux or Windows) that allow me to get performance measures like cycle execution, cache accesses, etc. for an x86 architecture. I want to estimate the performance overhead due to the modification that I do using LLVM. Any suggestion is welcome. Thanks in advance, -- Juan Carlos -------------- next part -------------- An HTML attachment was

You mean 'cachegrind'? http://valgrind.org/info/tools.html#cachegrind I don't know any public tool better than this (but someone please tell me if I am misinformed). - Daniel On Tue, Sep 1, 2009 at 2:42 PM, Juan Carlos Martinez Santos<juanc.martinez.santos at gmail.com> wrote: > Hello everybody, > > I am looking for a tool (in Linux or Windows) that allow me to get

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 all: We have a user who needs to do some work with PAPI, which requires the perfctr patch applied to the kernel proper. Before I do that work here, I wanted to ask the list if anyone knows of a repo where such kernels are available? Also, if anyone has gone down this route and has helpful hints, perspectives, horror stories, etc., I would covet that information also. Cheers and Thanks,

Hi Guys, I am an absolute newbie to the compiler community. I am experimenting a little bit with llvm. I have a few small questions, i would be really great if someone could help me. 1. Can i find out (is there something already built), if the previous instruction / or some instruction was a cache miss. Basically i want to detect cache misses and instructions that are causing this 2. Can i find

Than a lot John!!!! That was great, i wanted to read the performance counter, but was always afraid how llvm would react (virtual machine) Thanx for the resource i ll go through it. i think i read somewhere that llvm doesnot support assembly instructions??? Also can you redirect me to run-time transforms for llvm, where can i find the material. I thought that the transfor pass is done on the IR

I''m looking into getting Xenoprof to tun in an HVM domain, since we will eventually need a profiler for HVM domains to track down areas of poor performance. (HVMs have poor performance? :) ) Being relatively new to OProfile, Xenoprof, and Xen internals, I would appreciate any pointers, tips, and comments on how to work the implementation. I see three basic areas of work. 1. Implement

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

Has anyone succesfully compiled a PAPI+perfctr-enabled kernel? I've been mixing and matching instructions from the PAPI distribution and those from CentOS wiki to no avail. TIA -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina

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

Hi, Keir, Currently, HVM guests do not have access to performance counters. So it is not possible to use performance analyzer software such as vtune in HVM guest to analyze programme performance. Other usage of performance counters , for example, the NMI watchdog, won''t function either. This patch will enable performance counters in HVM guest. Currently, only Core 2 Duo is implemented.

On 8 June 2015 at 06:40, Samuel Pitoiset <samuel.pitoiset at gmail.com> wrote: > This commit introduces the NVIF_IOCTL_NEW_V0_PERFMON class which will be > used in order to query domains, signals and sources. This separates the > querying and the counting interface. Hey Samuel, I've merged patches 1-4 already, I've got some comments on this one, but after they're solved

I've a the following happen a couple times now, and my internet searches are failing to locate an answer to the problem. We've got a few servers that primarily house VMs using KVM. They've got E-3 cpus and 32 GB RAM, and they run stock CentOS 6.4, fully patched (not yet migrated to 6.5). The VM disk images are housed on an NFS server. None of the VMs is particularly

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

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

These patches address issues in the kernel part of xenoprof: * Ill-advised use of on_each_cpu() can lead to sleep with interrupts disabled. * Race conditions in active_domains code. * Cleanup of active_domains code. Comments welcome. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

I have a question about the performance of the implementation of the stack protector in LLVM. Consider the following C program: ===== void canary() { char buf[20]; buf[0]++; } int main() { int i; for (i = 0; i < 1000000000; ++i) canary(); return 0; } ===== This should definately run slower when stack protection is enabled, right? I have measured the runtime of

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

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