On Thu, 2008-06-12 at 15:40 -0400, Dan Terpstra wrote:
> Hi -
> In preliminary testing of PAPI on perfmon2/Cell, it appears that the CYCLES
> event produced by pfm_get_cycle_event() is not virtualized beyond 32 bits.
> One of the basic PAPI tests shows this quite clearly:
Virtual 64 bit counters on CELL do work. The virtual counters work for
the CPC tool which works directly on the perfmon2 API.
Please make sure that the CELL pm_status register is configured to
enable interrupts on counter overflow for the counter you are using.
Bits 0:7 of the 32 bit register where (0 is the MSB and 31 is the LSB)
correspond to the 8 16 bit counters. For CELL, we only support 32 bits
which means you need to set bits 0:3 in the register for counters 0 to
3.
<snip>
> Is this (not) happening in the kernel or in the libpfm layer?
> Does the same apply to other events as well?
>
> - d
>
This will be true for all events.
Carl Love
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