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[app][tests] beef up the cache benchmark tests a little bit

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Travis Geiselbrecht
2014-10-19 01:02:43 -07:00
parent 199e94c63c
commit 9b7b6cdbf3
1 changed files with 22 additions and 10 deletions
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32
app/tests/cache_tests.c
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@@ -30,31 +30,43 @@
#include <lib/console.h>
#include <platform.h>
static int cache_tests(int argc, const cmd_args *argv)
static void bench_cache(size_t bufsize)
{
lk_bigtime_t t;
printf("testing cache\n");
uint8_t *buf = memalign(PAGE_SIZE, bufsize);
printf("buf %p, size %zu\n", buf, bufsize);
#define BUFSIZE (256*1024)
uint8_t *buf = memalign(PAGE_SIZE, BUFSIZE);
printf("buf %p\n", buf);
if (!buf)
return;
t = current_time_hires();
arch_clean_cache_range((addr_t)buf, BUFSIZE);
arch_clean_cache_range((addr_t)buf, bufsize);
t = current_time_hires() - t;
printf("took %llu usecs to clean %d bytes (cold)\n", t, BUFSIZE);
printf("took %llu usecs to clean %d bytes (cold)\n", t, bufsize);
memset(buf, 0x99, BUFSIZE);
memset(buf, 0x99, bufsize);
t = current_time_hires();
arch_clean_cache_range((addr_t)buf, BUFSIZE);
arch_clean_cache_range((addr_t)buf, bufsize);
t = current_time_hires() - t;
printf("took %llu usecs to clean %d bytes (hot)\n", t, BUFSIZE);
printf("took %llu usecs to clean %d bytes (hot)\n", t, bufsize);
free(buf);
}
static int cache_tests(int argc, const cmd_args *argv)
{
printf("testing cache\n");
bench_cache(2*1024);
bench_cache(64*1024);
bench_cache(256*1024);
bench_cache(1024*1024);
bench_cache(16*1024*1024);
return 0;
}