On 7/7/2020 12:32 AM, Honnappa Nagarahalli wrote:
> The throughput calculation requires a counter that measures
> passing of time. However, the kernel saves and restores the PMU
> state when a thread is unscheduled and scheduled. This ensures
> that the PMU cycles are not counted towards a thread that is
> not scheduled. Hence, when RTE_ARM_EAL_RDTSC_USE_PMU is enabled,
> the PMU cycles do not represent the passing of time.
> This results in incorrect calculation of throughput numbers.
> Use clock_gettime system call to calculate the time passed since
> last call.
>
> Bugzilla ID: 450
> Fixes: 0e106980301d ("app/testpmd: show throughput in port stats")
> Cc: [email protected]
> Cc: [email protected]
>
> Signed-off-by: Honnappa Nagarahalli <[email protected]>
> Reviewed-by: Phil Yang <[email protected]>
> Reviewed-by: Ruifeng Wang <[email protected]>
> Reviewed-by: Ferruh Yigit <[email protected]>
> Tested-by: Phil Yang <[email protected]>
> Tested-by: Ali Alnubani <[email protected]>
Series applied to dpdk-next-net/master, thanks.
