23 Feb
2012
23 Feb
'12
12:57 a.m.
On Wed, Feb 22, 2012 at 10:41 PM, Dmitry Antipov dmitry.antipov@linaro.org wrote:
On 02/22/2012 05:59 PM, Dave Martin wrote:
However, the way that the performance counter interrupts are routed is dependent on the SoC. OMAP4 and later have an unusual way of doing this, which is why perf doesn't currently work upstream for these platforms.
But will it work on Panda board with linux-linaro-3.3-rc3-2012.02-1 at least?
No, it doesn't work with upstream kernel now. You need to apply the patches[1][2] against upstream kernel to route CTIs IRQ so that OMAP4 PMU/perf can work well.
[1], http://marc.info/?l=linux-omap&m=132686049213313&w=2 [2], http://marc.info/?l=linux-arm-kernel&m=132687938417894&w=2
thanks, -- Ming Lei