Add a performance test to the service run on app lcore auto- test. This test runs the service in a tight loop, and measures cycles passed, printing the results. It provides a quick cycle cost value, enabling measuring performance of the function to run a service on an application lcore.
Signed-off-by: Harry van Haaren <harry.van.haa...@intel.com> --- I'm suggesting to merge this patch before the bugfix/C11 patch series, (v2 currently here: http://patches.dpdk.org/patch/69199/ ) as this would enable users to benchmark the "before" and "after" states of the bugfix/C11 patches easier. --- app/test/test_service_cores.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/app/test/test_service_cores.c b/app/test/test_service_cores.c index a922c7ddc..469243314 100644 --- a/app/test/test_service_cores.c +++ b/app/test/test_service_cores.c @@ -789,8 +789,18 @@ service_app_lcore_poll_impl(const int mt_safe) "MT Unsafe: App core1 didn't return -EBUSY"); } - unregister_all(); + /* Performance test: call in a loop, and measure tsc() */ + const uint32_t perf_iters = (1 << 12); + uint64_t start = rte_rdtsc(); + for (uint32_t i = 0; i < perf_iters; i++) { + int err = service_run_on_app_core_func(&id); + TEST_ASSERT_EQUAL(0, err, "perf test: returned run failure"); + } + uint64_t end = rte_rdtsc(); + printf("perf test for %s: %0.1f cycles per call\n", mt_safe ? + "MT Safe" : "MT Unsafe", (end - start)/(float)perf_iters); + unregister_all(); return TEST_SUCCESS; } -- 2.17.1
