similar to: Perfctr-Xen framework for performance analysis

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

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 all, I have installed a CentOS-8 server to accomplish some tests using kvm guests ? All these guests are centos8 also. When these guests starts, I always see errors like: [ 589.687915] kvm [2133]: vcpu0, guest rIP: 0xffffffff81a5bc98 disabled perfctr wrmsr: 0xc2 data 0xffff [ 596.210773] kvm [2201]: vcpu0, guest rIP: 0xffffffffb885bc98 disabled perfctr wrmsr: 0xc2 data 0xffff Is this a

Renato, If one creates an HVM domain (say domain 1) and then does echo 1 > /dev/oprofile/passive_domains one then gets the following on the Xen serial console: (XEN) xenoprof.c:143:d0 xenoprof/x86 with autotranslated mode enabledisn''t supported yet (XEN) xenoprof.c:143:d0 xenoprof/x86 with autotranslated mode enabledisn''t supported yet (XEN) xenoprof.c:143:d0

Hello everyone, I''m trying to run Xenoprof (Oprofile 0.9.4) in Gentoo Linux 2.6.21-xen (64 bit) on an AMD 64 system and am facing the following two issues: 1. Xenoprof complains about a write error, but starts and runs anyway. dom0 # opcontrol --start-daemon --active-domains=0 --event=CPU_CLK_UNHALTED:75000::1:1 --vmlinux=/usr/src/linux-2.6.21-xen-dom0/vmlinux

xenoprof: flush remaining smples when sampling is stopped. Xenoprof notifies guest kernel via VIRQ_XENOPROF when sampled. But it does coarsly based on heuristic so that sometimes VIRQ_XENOPROF isn''t delivered resulting in that oprofile daemon collects no sample. To avoid that situation, always send VIRQ_XENOPROF when sampling is stopped. -- yamahata

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

I''m trying to use xenoprof in my machine (xeon x5650, westmere). While oprof works for this machine correctly, xenoprof doesn''t work properly. I want to use xenoprof in NMI mode (which is the opposite side of timer mode, right?) However, kernel message always shows that xenoprof works in the timer mode only. Is there any restriction or specs which is not

On 2/24/13 10:07 AM, Lu Mitnick wrote: > Hello all, > > I have developed a instrumented pass which insert some variables > between the original variables, > as well as insert some code into the original source code. just like: > > ============= original source code ============= > > int a[10]; > > void fun1 () { > // some source code here > } > >

>> >> Is the nmi_sanity_check() needed? We shouldn''t lose NMIs: >> even if we take one while doing NMI processing, we sholuld >> retake the NMI as soon as the first one IRETs. >> The nmi_sanity_check() should not be needed if everything is working fine. However I suggest we should keep it for now until we are sure it is safe to remove it. I would

Hello Xen Users, I am trying to Patch the linux-2.6-sparse source tree to get it working with Xenoprof. I have obtained the patch from the Xenoprof source forge website maintained by HP. http://xenoprof.sourceforge.net/ However, I am unable to apply the patch as the source-tree structure expected by the patch is different from the one in 3.0.2 distribution. Has anyone encountered this

Hi All. I''m trying to use xenoprof in my Xeon machine with PVOPS (3.1.0 kernel) & xen 4.1.1. In the past, I had failed to use the xenoprof in this environment. (1 year ago) While baremetal booting shows the counter object in /dev/oprofile/0 (or 1,2,3) , booting with xen fails to create those objects. Of course, opcontrol command doesn''t work. It only prints

my system configuration xen 3.4.2, oprofile 0.9.5( xenoprof patched ), dom0( jeremy''s pvops kernel 2.6.31.6 - patched dullor''s xenoprof patch ), domU( vanilla kernel 2.6.32 with paravirt enabled ), distribution( ubuntu 9.10 ) In passive mode, xenoprof seems to work well, opreport showed good information. but, in active mode, it seems not to be done correctly. my command is

Hi, I ran xenoprof with the event mask LLC_MISSES:10000. This should be L2 cache misses on Core2 arch. After the run when I run opreport it displays : Counted *L2_RQSTS* events (number of L2 cache requests) with a unit mask of 0x41 (multiple flags) count 10000 LLC_MISSES:10000 | ..... My questions was whether the message is incorrect or the event mask is not being set correctly by oprofile. My

See below... ---------- Forwarded Message ---------- Subject: RE: [Xen-devel] xenoprof passive profiling and "mode" setting Date: Wednesday 05 July 2006 21:53 From: "Yang, Xiaowei" <xiaowei.yang@intel.com> To: "Keir Fraser" <Keir.Fraser@cl.cam.ac.uk>, "Ray Bryant" <raybry@mpdtxmail.amd.com> Cc: xen-devel@lists.xensource.com

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

On Tue, Feb 17, 2015 at 7:34 PM, Jason Pyeron <jpyeron at pdinc.us> wrote: >> -----Original Message----- >> From: Chris Murphy >> Sent: Tuesday, February 17, 2015 20:48 >> >> On Tue, Feb 17, 2015 at 7:54 AM, Jason Pyeron wrote: >> >> I'd post the entire dmesg somewhere >> > >> >

yue wrote: > hi, > about [LLVMdev] another question > > thanks > > yueqiang One other thing you might want to try is to put your object tree in a directory that is *not* inside of your source tree. Currently, we don't support using separate object trees that are subdirectories of the source tree. In other words: Will work: ========== SRC_ROOT=/home/yue/llvm