> > Existing cntvct_el0 based rte_rdtsc() provides portable means to get wall > > clock > > counter at user space. Typically it runs at <= 100MHz. > > > > The alternative method to enable rte_rdtsc() for high resolution wall clock > > counter is through armv8 PMU subsystem. > > The PMU cycle counter runs at CPU frequency, However, access to PMU cycle > > counter from user space is not enabled by default in the arm64 linux kernel. > > It is possible to enable cycle counter at user space access by configuring > > the > > PMU from the privileged mode (kernel space). > > > > by default rte_rdtsc() implementation uses portable > > cntvct_el0 scheme. Application can choose the PMU based implementation with > > CONFIG_RTE_ARM_EAL_RDTSC_USE_PMU > > > > Signed-off-by: Jerin Jacob <jerin.jacob at caviumnetworks.com> > > Acked-by: Hemant Agrawal <hemant.agrawal at nxp.com>
Applied, thanks Please do not forget documentation and upstreaming efforts.
