79 lines
2.2 KiB
C
79 lines
2.2 KiB
C
/*
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* Copyright (c) 2014 Travis Geiselbrecht
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#if ARM_WITH_CACHE
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <arch.h>
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#include <arch/ops.h>
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#include <lib/console.h>
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#include <platform.h>
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static void bench_cache(size_t bufsize)
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{
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lk_bigtime_t t;
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uint8_t *buf = memalign(PAGE_SIZE, bufsize);
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printf("buf %p, size %zu\n", buf, bufsize);
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if (!buf)
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return;
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t = current_time_hires();
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arch_clean_cache_range((addr_t)buf, bufsize);
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t = current_time_hires() - t;
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printf("took %llu usecs to clean %d bytes (cold)\n", t, bufsize);
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memset(buf, 0x99, bufsize);
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t = current_time_hires();
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arch_clean_cache_range((addr_t)buf, bufsize);
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t = current_time_hires() - t;
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printf("took %llu usecs to clean %d bytes (hot)\n", t, bufsize);
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free(buf);
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}
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static int cache_tests(int argc, const cmd_args *argv)
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{
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printf("testing cache\n");
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bench_cache(2*1024);
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bench_cache(64*1024);
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bench_cache(256*1024);
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bench_cache(1024*1024);
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bench_cache(16*1024*1024);
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return 0;
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}
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STATIC_COMMAND_START
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STATIC_COMMAND("cache_tests", "tests of cpu cache", &cache_tests)
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STATIC_COMMAND_END(cache_tests);
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#endif
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