Re: [PATCH v8 02/14] perf: Add AUX area to ring buffer for raw data streams

2015-01-12 Thread Alexander Shishkin
Peter Zijlstra writes: > On Mon, Jan 12, 2015 at 03:12:58PM +0200, Alexander Shishkin wrote: >> > I suppose we could; I'm trying to remember why I did it like this, I'm >> > failing to remember much past yesterday atm :/ >> >> Well, right now we can only map things in one order: user page + per

Re: [PATCH v8 02/14] perf: Add AUX area to ring buffer for raw data streams

2015-01-12 Thread Peter Zijlstra
On Mon, Jan 12, 2015 at 03:12:58PM +0200, Alexander Shishkin wrote: > > I suppose we could; I'm trying to remember why I did it like this, I'm > > failing to remember much past yesterday atm :/ > > Well, right now we can only map things in one order: user page + perf > buffer, then aux buffer. Id

Re: [PATCH v8 02/14] perf: Add AUX area to ring buffer for raw data streams

2015-01-12 Thread Alexander Shishkin
Peter Zijlstra writes: > On Mon, Nov 17, 2014 at 09:33:00AM +, Metzger, Markus T wrote: >> > From: Peter Zijlstra >> > >> > This patch introduces "AUX space" in the perf mmap buffer, intended for >> > exporting high bandwidth data streams to userspace, such as instruction >> > flow traces.

Re: [PATCH v8 02/14] perf: Add AUX area to ring buffer for raw data streams

2015-01-09 Thread Peter Zijlstra
On Mon, Nov 17, 2014 at 09:33:00AM +, Metzger, Markus T wrote: > > From: Peter Zijlstra > > > > This patch introduces "AUX space" in the perf mmap buffer, intended for > > exporting high bandwidth data streams to userspace, such as instruction > > flow traces. > > > > AUX space is a ring buf

Re: [PATCH v8 02/14] perf: Add AUX area to ring buffer for raw data streams

2014-11-17 Thread Andi Kleen
On Mon, Nov 17, 2014 at 01:24:00PM -0800, Sukadev Bhattiprolu wrote: > Alexander Shishkin [alexander.shish...@linux.intel.com] wrote: > | From: Peter Zijlstra > | > | This patch introduces "AUX space" in the perf mmap buffer, intended for > | exporting high bandwidth data streams to userspace, su

Re: [PATCH v8 02/14] perf: Add AUX area to ring buffer for raw data streams

2014-11-17 Thread Sukadev Bhattiprolu
Alexander Shishkin [alexander.shish...@linux.intel.com] wrote: | From: Peter Zijlstra | | This patch introduces "AUX space" in the perf mmap buffer, intended for | exporting high bandwidth data streams to userspace, such as instruction | flow traces. | | AUX space is a ring buffer, defined by au

RE: [PATCH v8 02/14] perf: Add AUX area to ring buffer for raw data streams

2014-11-17 Thread Metzger, Markus T
> -Original Message- > From: Alexander Shishkin [mailto:alexander.shish...@linux.intel.com] > Sent: Friday, November 14, 2014 2:44 PM > To: Peter Zijlstra > Cc: Ingo Molnar; linux-kernel@vger.kernel.org; Robert Richter; Frederic > Weisbecker; Mike Galbraith; Paul Mackerras; Stephane Eranian