On Tue, 3 Oct 2023 15:49:00 +0530 Hari Haran <[email protected]> wrote:
> > > > The problem is that rte_rdtsc() stops speculative execution so doing > > lots of TSC instructions can hurt performance. > > > > To correlate TSC timestamp to system time, you need to compute the offsets > > once at startup. Alternatively, don't use rte_rdtsc() and instead use > > clock_gettime() with the monotonic timer and the C library does the > > calculation > > for you. > > > > > As part of query 1 and based on your response, I am asking below query > > But usage of clock_gettime() (kernel function) in lcore is advisable one? > My understanding is, > shall avoid usage of kernel function in lcore. Correct me if I am wrong? clock_gettime() is a virtual system call (VDSO) on most Linux platforms. But it is still slower than simple rte_rdtsc(). Internally clock_gettime VDSO
