On Thu, 23 Jul 2015, William Cohen wrote:
> Right now the output of the test is looking wrong on the cortex ac53 board
> and I need to do some additional investigation. The ac53 events are very
> similar to other armv8 hardware. I should get an xgene or seattle machine and
> do some comparisons between them. The problem could be in places other than
> libpfm4 such as the kernel.
The problem is in PAPI, the workaround for the lack of kernel/user
separation pre Cortex-A15 was never updated.
see the code in the perf_event component:
/* ARM */
if ( _papi_hwi_system_info.hw_info.vendor == PAPI_VENDOR_ARM) {
/* FIXME: this will change with Cortex A15 */
vector->cmp_info.available_domains |=
PAPI_DOM_USER | PAPI_DOM_KERNEL | PAPI_DOM_SUPERVISOR;
vector->cmp_info.default_domain =
PAPI_DOM_USER | PAPI_DOM_KERNEL | PAPI_DOM_SUPERVISOR;
}
Vince
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