From: Will D. <wil...@ar...> - 2012-04-03 09:48:01
|
On Tue, Apr 03, 2012 at 10:42:30AM +0100, Shilimkar, Santosh wrote: > On Tue, Apr 3, 2012 at 2:55 PM, Will Deacon <wil...@ar...> wrote: > > Did you ever get to the bottom of this? This change really is required in > > order to generate PMU interrupts with the CTI and I don't know of any > > alternative to the above. > > > > Any suggestions? > > > Sorry I lost track of this one. There is one relevant patch in Kevin's queue > for 3.4/fixes. [1] which I generated for perf time stamp issue. Thanks, I'll take a look. > Can you try that patch and see if it helps the CTI issue as well ? There > is an outside chance that it might help. If it doesn't, we should commit > Ming Lei patch. It seems that they're both needed to get reliable PMU operation. Without the CLKDM_CAN_SWSUP fix, no interrupts are generated at all. Without the patch below ([1]), it seems that we don't generate enough. So it looks like we need them both. > [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2012-March/089679.html Cheers, Will |