similar to: [CSL #351425] perfctr-enabled C5 kernel anyone?

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

Regarding Perfctr-Xen (see announcement below), some have requested author''s version of the published paper. It is available on my website: http://people.cs.vt.edu/~rnikola/?page_id=159 Please, let me know what you think. Also, I want to iterate my point regarding Perfctr-Xen vs XenoProf: XenoProf is useful but has a number of limitations such as system-wide monitoring only.

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

-------------- next part -------------- An embedded message was scrubbed... From: John Criswell <criswell at cs.uiuc.edu> Subject: Re: [LLVMdev] A simulation tool Date: Tue, 1 Sep 2009 17:23:34 -0500 Size: 2903 URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20090901/c1e167ca/attachment.eml>

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

> -----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 > > > > http://client.pdinc.us/panic-341e97c30b5a4cb774942bae32d3f163.log > > At least part of the problem happens before this log starts. Feb 15 23:41:19

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 > } > >

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

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 } ========================================= ============= instrumented source code ============= int

Guys, Someone have any idea how could I measure the execution time of each LLVM basic block of a program? I tried to use some profiling tools like gcov and perf, but as far as I know they can only give me the frequency that each basic block is executed. I was thinking about writing a pass to add PAPI instructions in each LLVM basic block. Do you think is a good idea? Thanks Vanderson M.

Hi, I had a C7 virtual machine running on a C7 host for several weeks without any problems. Today I rebootet the host and now the virtual machine does not start anymore. I can see grub coming up and starting the kernel. After some seconds the last thing that is visble on the VM console is "ss perfctr msr (MSR c1 is0)" then the screen goes blank with just a blinking cursor in the upper

Jon, I need to create a database of basics blocks and their execution time. The only thing I'm concerned is if a block A is more expensive than a block B. Do you think that even with the overhead I would be able to get the A > B information? Like: overhead + time(A) > overhead + time(B) => A > B. If so, I'm not too much concerned about the accuracy. Not sure if I was clear,

I can see from different post that if working with sr-iov, i should work with vlan Is this an obligation to work with vlan if working with sr-iov? If not according to which parameter will the different vf get the traffic. Let's say i declare max_vfs=7, how will the traffic be seperated between the vm? However till i get an answer i tried to work with vlan And i still don't get

Hi All, we've run into a problem with the xfs component in the centosplus kernel (2.6.9-34.106.unsupportedsmp) where synchronous writes sometimes fail with EAGAIN. It's causing headaches for DB2 installs and for our database research group. There is a fix reported at: http://marc.theaimsgroup.com/?l=linux-xfs&m=110808122904352&w=2 ...that's supposed to take care of

Hi, i'm rather new to kvm. now i set up a centos 7 guest on a centos 6 kvm host. when i try to use bridged networking in the centos7 guest this works for the interface that uses eth1/br1 on the host. when i try to use a second interface in the guest with eth0/br0 on the host this brings the host interface down as soon as i do ip configuration in the guest (so it seems). eth0 shall have

We're running a mix of ext3 and xfs file systems on CentOS 4 workstations at our site. We have benefitted greatly from the increased performance and fast (crash recovery) reboot times that we get from xfs. We're currently running CentOS kernel 2.6.9-42.0.8.EL and xfs version 0.2-1. We have one host where we've got issues. It's a (very) busy imap server with external scsi hardware

On 5/16/20 5:09 PM, Leon Fauster via CentOS wrote: > Am 11.05.20 um 15:59 schrieb Leon Fauster: >> Since C8.1? kvm guests have a huge delay while booting on a kvm host based on C6. This delay was not present with C8.0. The "pause" happend >> direct after the grub step. The VNC session shows only a "_" character. >> > > and this are the corresponding

> ---------- Forwarded message ---------- > From: <noreply at centos.org> > Date: Mon, Dec 15, 2014 at 2:31 PM > Subject: [CentOS Wiki] Update of "HowTos/Custom Kernel" by AkemiYagi > To: noreply at centos.org > > Dear Wiki user, > > You have subscribed to a wiki page or wiki category on "CentOS Wiki" for change notification. > > The

On Mon, Dec 15, 2014 at 3:12 PM, Alan Bartlett <ajb at elrepo.org> wrote: > On 15 December 2014 at 23:04, PatrickD Garvey <patrickdgarveyt at gmail.com> wrote: >>> The following page has been changed by AkemiYagi: >>> http://wiki.centos.org/HowTos/Custom_Kernel?action=diff&rev2=179&rev1=178 >> >> I know I'm new around here and this is

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