Re: Large spikes in latencies

2015-05-29 Thread Ken Moffat
On Fri, May 29, 2015 at 06:14:46PM -0400, Yogi A. Patel wrote: > > > On 05/28/2015 08:54 PM, Michel Dänzer wrote: > > Can you narrow down when the problem was introduced in the kernel, > > ideally with git bisect? > > > I did a few experiments and here is an update: > > + It seems that whatever

Re: Large spikes in latencies

2015-05-29 Thread Yogi A. Patel
> On 05/28/2015 08:54 PM, Michel Dänzer wrote: >> On 28.05.2015 22:21, Yogi A. Patel wrote: >> Setup - I am using a custom-compiled Linux kernel 3.14.17 on Ubuntu >> 14.04. The kernel is patched with Xenomai using Ipipe >> 3.14.17-x84-4.patch. I have a Radeon HD 8570HD R7 240 graphics card in >> t

Re: Large spikes in latencies

2015-05-29 Thread Yogi A. Patel
On 05/28/2015 08:54 PM, Michel Dänzer wrote: On 28.05.2015 22:21, Yogi A. Patel wrote: Setup - I am using a custom-compiled Linux kernel 3.14.17 on Ubuntu 14.04. The kernel is patched with Xenomai using Ipipe 3.14.17-x84-4.patch. I have a Radeon HD 8570HD R7 240 graphics card in this system. I

Re: Large spikes in latencies

2015-05-28 Thread Michel Dänzer
On 28.05.2015 22:21, Yogi A. Patel wrote: > > Setup - I am using a custom-compiled Linux kernel 3.14.17 on Ubuntu > 14.04. The kernel is patched with Xenomai using Ipipe > 3.14.17-x84-4.patch. I have a Radeon HD 8570HD R7 240 graphics card in > this system. > > I can confirm that the radeon drive

Large spikes in latencies

2015-05-28 Thread Yogi A. Patel
Hi - Note - I know that this is not a Xenomai mailing list - however I have already posted there and it appears that the problems I am seeing are not from Xenomai, but rather from the use of the radeon driver. Setup - I am using a custom-compiled Linux kernel 3.14.17 on Ubuntu 14.04. The kerne