Dear libpfm developers and users,
I'm new to this tool.
I would like to do precise accounting for an application running on a
big.LITTLE system (quad A7 & quad A15).
For instance, I would like to have precise PMC value for my application only
(without kernel threads or other running applications) for all available cores
on the machine.
As an example, if I want cpu-cycles and context-switches counters, and if I
taskset/sched_setaffinity my application to stick to a specific core, counters
from other cores than the sticked core will have 0 (or really close to, until
the core affinity is done).
After small test with checkevent and showevtinfo, the pmu detection/selection
chose only one pmu at a time, not both arm_ac7 and arm_ac15. I try to force
both pmu with LIBPFM_FORCE_PMU environment variable, but it seems to not
working.
- Is it possible to specify an event, and get the values for all cores in an
unaggregated manner?
- Is it possible to mix multiple pmus?
- Is it possible to select an event from its IDX? For instance, mixing this two
event:
- IDX : 157286411
PMU name : arm_ac15 (ARM Cortex A15)
Name : CPU_CYCLES
- IDX : 320864273
PMU name : arm_ac7 (ARM Cortex A7)
Name : CPU_CYCLES
Best Regards,
Willy
------------------------------------------------------------------------------
What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic
patterns at an interface-level. Reveals which users, apps, and protocols are
consuming the most bandwidth. Provides multi-vendor support for NetFlow,
J-Flow, sFlow and other flows. Make informed decisions using capacity
planning reports. https://ad.doubleclick.net/ddm/clk/305295220;132659582;e
_______________________________________________
perfmon2-devel mailing list
perfmon2-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
