ACK: [PULL] perf support for X-Gene

[Brad Figg]

On 08/15/2014 01:52 PM, Dann Frazier wrote:
> On Fri, Aug 15, 2014 at 10:54 AM, Dann Frazier
> <dann.frazier at canonical.com> wrote:
>> This branch makes perf work on X-Gene:
>>
>> git://kernel.ubuntu.com/dannf/ubuntu-utopic-hyperscale.git xgene-perf
>>
>> A working perf tool is expected by users these days, and it's absence
>> makes it a real pain to do any performance triage with the official
>> Ubuntu kernel builds.
>>
>> There are 2 pieces here - the device-tree binding/node and a bug fix.
>>
>> The device-tree node has been submitted twice upstream (initially back
>> in March and again earlier this month), but hasn't gotten a response
>> from upstream yet. It is obviously correct IMO. The only thing I could
>> possibly see changing upstream would be to select a compatible string
>> other than "potenza-pmu". But that wouldn't be a problem for Ubuntu as
>> no existing driver code binds to it.
>>
>> The other patch in this series is the "irqchip:gic: change access of
>> gicc_ctrl register to read modify write." patch. This patch fixes a
>> crash that is very easy to reproduce by running "perf top". We've been
>> testing with this patch for some time now with no negative results.
>> This patch was submitted a few times, but the last submission in
>> February never saw any upstream feedback. Now that the upstream gic
>> code has been reworked to support GICv3 (post-3.16), this code will
>> need to be reworked to apply for mainline.
> 
> Here's the same for trusty:
> 
> git://kernel.ubuntu.com/dannf/trusty-xgene.git xgene-perf
> 
> In addition to the patches described above, there are 2 clean
> cherry-picks from upstream required for perf support in 3.13.
> 


-- 
Brad Figg brad.figg at canonical.com http://www.canonical.com