From 58eb1d9331e7f4703d4f9d13f741d205ecb9897e Mon Sep 17 00:00:00 2001 From: Herbert Guan Date: Wed, 25 Oct 2017 15:13:46 +0800 Subject: [PATCH] test/memcpy_perf: provide perf ratio and test time The printed time values presented in TSC is not straight forward showing the performance difference. And if the high resolution counter is not enabled, time value is too small to show the actual performance (e.g. "1 - 1" seems the same but in fact the perfomance diffs by 50% or more). With the performance difference ratio caculated and printed, it'll be easier for people to read and compare the performance between rte_memcpy() and memcpy(). Since the TSC values' units may diff a lot on different platforms, the total execution time of aligned/unaligned memcpy test are provided to allow comparation between platforms. Signed-off-by: Herbert Guan Acked-by: Jianbo Liu --- test/test/test_memcpy_perf.c | 51 +++++++++++++++++++++++++++--------- 1 file changed, 39 insertions(+), 12 deletions(-) diff --git a/test/test/test_memcpy_perf.c b/test/test/test_memcpy_perf.c index ff3aaaacad..f1084ca132 100644 --- a/test/test/test_memcpy_perf.c +++ b/test/test/test_memcpy_perf.c @@ -35,6 +35,7 @@ #include #include #include +#include #include #include @@ -217,8 +218,9 @@ do { \ memcpy(dst+dst_addrs[t], src+src_addrs[t], size); \ total_time2 += rte_rdtsc() - start_time; \ } \ - printf("%8.0f -", (double)total_time /TEST_ITERATIONS); \ - printf("%5.0f", (double)total_time2 / TEST_ITERATIONS); \ + printf("%3.0f -", (double)total_time / TEST_ITERATIONS); \ + printf("%3.0f", (double)total_time2 / TEST_ITERATIONS); \ + printf("(%6.2f%%) ", ((double)total_time - total_time2)*100/total_time2); \ } while (0) /* Run aligned memcpy tests for each cached/uncached permutation */ @@ -300,6 +302,9 @@ static int perf_test(void) { int ret; + struct timeval tv_begin, tv_end; + double time_aligned, time_unaligned; + double time_aligned_const, time_unaligned_const; ret = init_buffers(); if (ret != 0) @@ -316,25 +321,47 @@ perf_test(void) do_uncached_write(large_buf_write, 0, small_buf_read, 1, SMALL_BUFFER_SIZE); printf("\n** rte_memcpy() - memcpy perf. tests (C = compile-time constant) **\n" - "======= ============== ============== ============== ==============\n" - " Size Cache to cache Cache to mem Mem to cache Mem to mem\n" - "(bytes) (ticks) (ticks) (ticks) (ticks)\n" - "------- -------------- -------------- -------------- --------------"); + "======= ================= ================= ================= =================\n" + " Size Cache to cache Cache to mem Mem to cache Mem to mem\n" + "(bytes) (ticks) (ticks) (ticks) (ticks)\n" + "------- ----------------- ----------------- ----------------- -----------------"); - printf("\n========================== %2dB aligned ============================", ALIGNMENT_UNIT); + printf("\n================================= %2dB aligned =================================", + ALIGNMENT_UNIT); /* Do aligned tests where size is a variable */ + gettimeofday(&tv_begin, NULL); perf_test_variable_aligned(); - printf("\n------- -------------- -------------- -------------- --------------"); + gettimeofday(&tv_end, NULL); + time_aligned = (double)(tv_end.tv_sec - tv_begin.tv_sec) + + ((double)tv_end.tv_usec - tv_begin.tv_usec)/1000000; + printf("\n------- ----------------- ----------------- ----------------- -----------------"); /* Do aligned tests where size is a compile-time constant */ + gettimeofday(&tv_begin, NULL); perf_test_constant_aligned(); - printf("\n=========================== Unaligned ============================="); + gettimeofday(&tv_end, NULL); + time_aligned_const = (double)(tv_end.tv_sec - tv_begin.tv_sec) + + ((double)tv_end.tv_usec - tv_begin.tv_usec)/1000000; + printf("\n================================== Unaligned =================================="); /* Do unaligned tests where size is a variable */ + gettimeofday(&tv_begin, NULL); perf_test_variable_unaligned(); - printf("\n------- -------------- -------------- -------------- --------------"); + gettimeofday(&tv_end, NULL); + time_unaligned = (double)(tv_end.tv_sec - tv_begin.tv_sec) + + ((double)tv_end.tv_usec - tv_begin.tv_usec)/1000000; + printf("\n------- ----------------- ----------------- ----------------- -----------------"); /* Do unaligned tests where size is a compile-time constant */ + gettimeofday(&tv_begin, NULL); perf_test_constant_unaligned(); - printf("\n======= ============== ============== ============== ==============\n\n"); - + gettimeofday(&tv_end, NULL); + time_unaligned_const = (double)(tv_end.tv_sec - tv_begin.tv_sec) + + ((double)tv_end.tv_usec - tv_begin.tv_usec)/1000000; + printf("\n======= ================= ================= ================= =================\n\n"); + + printf("Test Execution Time (seconds):\n"); + printf("Aligned variable copy size = %8.3f\n", time_aligned); + printf("Aligned constant copy size = %8.3f\n", time_aligned_const); + printf("Unaligned variable copy size = %8.3f\n", time_unaligned); + printf("Unaligned constant copy size = %8.3f\n", time_unaligned_const); free_buffers(); return 0; -- 2.20.1