265 lines
7.3 KiB
C
265 lines
7.3 KiB
C
/*
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* Copyright (c) 2008-2012 Travis Geiselbrecht
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*
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* Use of this source code is governed by a MIT-style
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* license that can be found in the LICENSE file or at
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* https://opensource.org/licenses/MIT
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*/
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#include <sys/types.h>
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#include <stdio.h>
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#include <rand.h>
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#include <lk/err.h>
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#include <stdlib.h>
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#include <string.h>
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#include <app/tests.h>
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#include <kernel/thread.h>
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#include <kernel/mutex.h>
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#include <kernel/semaphore.h>
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#include <kernel/event.h>
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#include <platform.h>
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const size_t BUFSIZE = (1024*1024);
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const uint ITER = 1024;
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__NO_INLINE static void bench_set_overhead(void) {
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uint32_t *buf = malloc(BUFSIZE);
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if (!buf) {
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printf("failed to allocate buffer\n");
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return;
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}
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ulong count = arch_cycle_count();
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for (uint i = 0; i < ITER; i++) {
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__asm__ volatile("");
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}
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count = arch_cycle_count() - count;
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printf("took %lu cycles overhead to loop %u times\n", count, ITER);
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free(buf);
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}
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__NO_INLINE static void bench_memset(void) {
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void *buf = malloc(BUFSIZE);
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if (!buf) {
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printf("failed to allocate buffer\n");
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return;
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}
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ulong count = arch_cycle_count();
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for (uint i = 0; i < ITER; i++) {
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memset(buf, 0, BUFSIZE);
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}
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count = arch_cycle_count() - count;
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size_t total_bytes = BUFSIZE * ITER;
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double bytes_cycle = total_bytes / (double)count;
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printf("took %lu cycles to memset a buffer of size %zu %d times (%zu bytes), %f bytes/cycle\n",
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count, BUFSIZE, ITER, total_bytes, bytes_cycle);
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free(buf);
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}
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#define bench_cset(type) \
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__NO_INLINE static void bench_cset_##type(void) \
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{ \
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type *buf = malloc(BUFSIZE); \
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if (!buf) { \
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printf("failed to allocate buffer\n"); \
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return; \
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} \
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\
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ulong count = arch_cycle_count(); \
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for (uint i = 0; i < ITER; i++) { \
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for (uint j = 0; j < BUFSIZE / sizeof(*buf); j++) { \
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buf[j] = 0; \
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} \
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} \
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count = arch_cycle_count() - count; \
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\
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size_t total_bytes = BUFSIZE * ITER; \
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double bytes_cycle = total_bytes / (double)count; \
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printf("took %lu cycles to manually clear a buffer using wordsize %zu of size %zu %u times (%zu bytes), %f bytes/cycle\n", \
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count, sizeof(*buf), BUFSIZE, ITER, total_bytes, bytes_cycle); \
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\
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free(buf); \
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}
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bench_cset(uint8_t)
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bench_cset(uint16_t)
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bench_cset(uint32_t)
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bench_cset(uint64_t)
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__NO_INLINE static void bench_cset_wide(void) {
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uint32_t *buf = malloc(BUFSIZE);
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if (!buf) {
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printf("failed to allocate buffer\n");
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return;
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}
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ulong count = arch_cycle_count();
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for (uint i = 0; i < ITER; i++) {
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for (uint j = 0; j < BUFSIZE / sizeof(*buf) / 8; j++) {
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buf[j*8] = 0;
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buf[j*8+1] = 0;
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buf[j*8+2] = 0;
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buf[j*8+3] = 0;
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buf[j*8+4] = 0;
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buf[j*8+5] = 0;
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buf[j*8+6] = 0;
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buf[j*8+7] = 0;
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}
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}
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count = arch_cycle_count() - count;
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size_t total_bytes = BUFSIZE * ITER;
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double bytes_cycle = total_bytes / (double)count;
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printf("took %lu cycles to manually clear a buffer of size %zu %d times 8 words at a time (%zu bytes), %f bytes/cycle\n",
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count, BUFSIZE, ITER, total_bytes, bytes_cycle);
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free(buf);
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}
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__NO_INLINE static void bench_memcpy(void) {
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uint8_t *buf = malloc(BUFSIZE);
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if (!buf) {
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printf("failed to allocate buffer\n");
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return;
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}
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ulong count = arch_cycle_count();
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for (uint i = 0; i < ITER; i++) {
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memcpy(buf, buf + BUFSIZE / 2, BUFSIZE / 2);
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}
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count = arch_cycle_count() - count;
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size_t total_bytes = (BUFSIZE / 2) * ITER;
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double bytes_cycle = total_bytes / (double)count;
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printf("took %lu cycles to memcpy a buffer of size %zu %d times (%zu source bytes), %f source bytes/cycle\n",
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count, BUFSIZE / 2, ITER, total_bytes, bytes_cycle);
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free(buf);
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}
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#if ARCH_ARM
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__NO_INLINE static void arm_bench_cset_stm(void) {
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uint32_t *buf = malloc(BUFSIZE);
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if (!buf) {
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printf("failed to allocate buffer\n");
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return;
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}
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ulong count = arch_cycle_count();
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for (uint i = 0; i < ITER; i++) {
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for (uint j = 0; j < BUFSIZE / sizeof(*buf) / 8; j++) {
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__asm__ volatile(
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"stm %0, {r0-r7};"
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:: "r" (&buf[j*8])
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);
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}
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}
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count = arch_cycle_count() - count;
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size_t total_bytes = BUFSIZE * ITER;
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double bytes_cycle = total_bytes / (float)count;
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printf("took %lu cycles to manually clear a buffer of size %zu %d times 8 words at a time using stm (%zu bytes), %f bytes/cycle\n",
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count, BUFSIZE, ITER, total_bytes, bytes_cycle);
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free(buf);
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}
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#if (__CORTEX_M >= 0x03)
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__NO_INLINE static void arm_bench_multi_issue(void) {
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ulong cycles;
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uint32_t a = 0, b = 0, c = 0, d = 0, e = 0, f = 0, g = 0, h = 0;
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#define ITER 1000000
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uint count = ITER;
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cycles = arch_cycle_count();
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while (count--) {
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asm volatile ("");
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asm volatile ("add %0, %0, %0" : "=r" (a) : "r" (a));
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asm volatile ("add %0, %0, %0" : "=r" (b) : "r" (b));
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asm volatile ("and %0, %0, %0" : "=r" (c) : "r" (c));
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asm volatile ("mov %0, %0" : "=r" (d) : "r" (d));
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asm volatile ("orr %0, %0, %0" : "=r" (e) : "r" (e));
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asm volatile ("add %0, %0, %0" : "=r" (f) : "r" (f));
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asm volatile ("and %0, %0, %0" : "=r" (g) : "r" (g));
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asm volatile ("mov %0, %0" : "=r" (h) : "r" (h));
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}
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cycles = arch_cycle_count() - cycles;
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double cycles_iter = (float)cycles / ITER;
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printf("took %lu cycles to issue 8 integer ops (%f cycles/iteration)\n", cycles, cycles_iter);
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#undef ITER
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}
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#endif // __CORTEX_M
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#endif // ARCH_ARM
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#if WITH_LIB_LIBM
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#include <math.h>
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__NO_INLINE static void bench_sincos(void) {
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printf("touching the floating point unit\n");
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__UNUSED volatile double _hole = sin(0);
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volatile float input_f = 1234567.0f;
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volatile double input_d = 1234567.0;
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ulong count = arch_cycle_count();
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__UNUSED volatile double d = sin(input_d);
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count = arch_cycle_count() - count;
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printf("took %lu cycles for sin()\n", count);
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count = arch_cycle_count();
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d = cos(input_d);
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count = arch_cycle_count() - count;
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printf("took %lu cycles for cos()\n", count);
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count = arch_cycle_count();
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__UNUSED volatile float f = sinf(input_f);
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count = arch_cycle_count() - count;
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printf("took %lu cycles for sinf()\n", count);
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count = arch_cycle_count();
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f = cosf(input_f);
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count = arch_cycle_count() - count;
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printf("took %lu cycles for cosf()\n", count);
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count = arch_cycle_count();
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d = sqrt(input_d);
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count = arch_cycle_count() - count;
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printf("took %lu cycles for sqrt()\n", count);
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count = arch_cycle_count();
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f = sqrtf(input_f);
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count = arch_cycle_count() - count;
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printf("took %lu cycles for sqrtf()\n", count);
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}
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#endif // WITH_LIB_LIBM
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int benchmarks(int argc, const console_cmd_args *argv) {
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bench_set_overhead();
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bench_memset();
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bench_memcpy();
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bench_cset_uint8_t();
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bench_cset_uint16_t();
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bench_cset_uint32_t();
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bench_cset_uint64_t();
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bench_cset_wide();
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#if ARCH_ARM
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arm_bench_cset_stm();
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#if (__CORTEX_M >= 0x03)
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arm_bench_multi_issue();
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#endif
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#endif
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#if WITH_LIB_LIBM
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bench_sincos();
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#endif
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return NO_ERROR;
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}
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