diff options
| author | Yogesh Tillu <yogesh.tillu@linaro.org> | 2015-08-26 12:04:21 +0530 |
|---|---|---|
| committer | Yogesh Tillu <yogesh.tillu@linaro.org> | 2015-09-14 17:56:57 +0530 |
| commit | e910a6a03f4cf81a80cec31e55b4a7b362e1e539 (patch) | |
| tree | 09c8e230b18fbab0aea6911fb2f7889a68dc74d3 | |
| parent | a93ac4d3f9fcac9e9463c33c77ebd56d81667e46 (diff) | |
perf_*: Add compile time switch to measure max delay
This will add extra overhead if you want to track
the max delay as well.
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Yogesh Tillu <yogesh.tillu@linaro.org>
| -rw-r--r-- | Makefile | 4 | ||||
| -rw-r--r-- | perf_ev_open.c | 17 | ||||
| -rw-r--r-- | perf_rc_mmap.c | 17 |
3 files changed, 36 insertions, 2 deletions
@@ -3,7 +3,11 @@ # #SPDX-License-Identifier: BSD-3-Clause +ifeq ($(MAX_DELAY), 1) +CFLAGS ?= -O3 -DMAX_DELAY +else CFLAGS ?= -O3 +endif CC = $(CROSS_COMPILE)gcc INSTALL = /usr/bin/install diff --git a/perf_ev_open.c b/perf_ev_open.c index 86c23f9..1b95420 100644 --- a/perf_ev_open.c +++ b/perf_ev_open.c @@ -112,6 +112,10 @@ int main(int ac, char *argv[]) int *b = NULL; int i, pre_loop_res, post_loop_res, sum = 0; unsigned long s_period = 1000000; +#ifdef MAX_DELAY + unsigned long tmp_value = 0; + unsigned long max_value = 0; +#endif while ((option = getopt(ac, argv, "c:n:s:")) != -1) { switch (option) { @@ -156,7 +160,14 @@ int main(int ac, char *argv[]) time_start = cpucycles(); for (i = 0; i < 1000; i++) { sum = loop(a, b, len); +#ifndef MAX_DELAY cpucycles(); +#else + tmp_value = cpucycles(); + if ( max_value < tmp_value ) { + max_value = tmp_value; + } +#endif } time_end = cpucycles(); @@ -173,7 +184,11 @@ int main(int ac, char *argv[]) /* ---------------------------------- */ ioctl(fddev, PERF_EVENT_IOC_DISABLE, 0); post_loop_res = abs(time_end-time_start)/1000; - printf("\t%s Counter[%d] Delay[cpucycles]=%d overflows=%d\n", argv[0], cnt, abs(post_loop_res - pre_loop_res),overflow); +#ifndef MAX_DELAY + printf("\t%s Counter[%d] avg delay[cpucycles]=%d overflows=%d\n", argv[0], cnt, abs(post_loop_res - pre_loop_res),overflow); +#else + printf("\t%s Counter[%d] max delay[cpucycles]=%ld avg delay[cpucycles]=%d Overflows=%d\n", argv[0], cnt, max_value, abs(post_loop_res - pre_loop_res),overflow); +#endif free(a); free(b); close(fddev); diff --git a/perf_rc_mmap.c b/perf_rc_mmap.c index 7cfc0d1..b87c627 100644 --- a/perf_rc_mmap.c +++ b/perf_rc_mmap.c @@ -144,6 +144,10 @@ int main(int ac, char *argv[]) int i, pre_loop_res, post_loop_res, sum = 0; void *addr; /* mmaped address */ unsigned long start_count, stop_count, s_period=1000000; +#ifdef MAX_DELAY + unsigned long tmp_value = 0; + unsigned long max_value = 0; +#endif while ((option = getopt(ac, argv, "c:n:s:")) != -1) { switch (option) { @@ -201,7 +205,14 @@ int main(int ac, char *argv[]) start_count = mmap_read_self(addr); for (i = 0; i < 1000; i++) { sum = loop(a, b, len); +#ifndef MAX_DELAY mmap_read_self(addr); +#else + tmp_value = mmap_read_self(addr); + if ( max_value < tmp_value ) { + max_value = tmp_value; + } +#endif } stop_count = mmap_read_self(addr); @@ -217,7 +228,11 @@ int main(int ac, char *argv[]) ioctl(fddev, PERF_EVENT_IOC_DISABLE, 0); /* --------------------End Critical section-------------- */ post_loop_res = abs(stop_count-start_count)/1000; - printf("\t%s Counter[%d] Delay[cpucycles]=%d Overflows=%d\n", argv[0], cnt, abs(post_loop_res - pre_loop_res),overflow); +#ifndef MAX_DELAY + printf("\t%s Counter[%d] avg delay[cpucycles]=%d Overflows=%d\n", argv[0], cnt, abs(post_loop_res - pre_loop_res),overflow); +#else + printf("\t%s Counter[%d] max delay[cpucycles]=%ld avg delay[cpucycles]=%d Overflows=%d\n", argv[0], cnt, max_value, abs(post_loop_res - pre_loop_res),overflow); +#endif munmap(addr, page_size); free(a); free(b); |