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Diffstat (limited to 'src/journal/test-compress-benchmark.c')
| -rw-r--r-- | src/journal/test-compress-benchmark.c | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/src/journal/test-compress-benchmark.c b/src/journal/test-compress-benchmark.c deleted file mode 100644 index 6f6d71435d..0000000000 --- a/src/journal/test-compress-benchmark.c +++ /dev/null @@ -1,180 +0,0 @@ -/*** - This file is part of systemd - - Copyright 2014 Zbigniew Jędrzejewski-Szmek - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include "alloc-util.h" -#include "compress.h" -#include "macro.h" -#include "parse-util.h" -#include "random-util.h" -#include "string-util.h" -#include "util.h" - -typedef int (compress_t)(const void *src, uint64_t src_size, void *dst, - size_t dst_alloc_size, size_t *dst_size); -typedef int (decompress_t)(const void *src, uint64_t src_size, - void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max); - -static usec_t arg_duration = 2 * USEC_PER_SEC; -static size_t arg_start; - -#define MAX_SIZE (1024*1024LU) -#define PRIME 1048571 /* A prime close enough to one megabyte that mod 4 == 3 */ - -static size_t _permute(size_t x) { - size_t residue; - - if (x >= PRIME) - return x; - - residue = x*x % PRIME; - if (x <= PRIME / 2) - return residue; - else - return PRIME - residue; -} - -static size_t permute(size_t x) { - return _permute((_permute(x) + arg_start) % MAX_SIZE ^ 0xFF345); -} - -static char* make_buf(size_t count, const char *type) { - char *buf; - size_t i; - - buf = malloc(count); - assert_se(buf); - - if (streq(type, "zeros")) - memzero(buf, count); - else if (streq(type, "simple")) - for (i = 0; i < count; i++) - buf[i] = 'a' + i % ('z' - 'a' + 1); - else if (streq(type, "random")) { - size_t step = count / 10; - - random_bytes(buf, step); - memzero(buf + 1*step, step); - random_bytes(buf + 2*step, step); - memzero(buf + 3*step, step); - random_bytes(buf + 4*step, step); - memzero(buf + 5*step, step); - random_bytes(buf + 6*step, step); - memzero(buf + 7*step, step); - random_bytes(buf + 8*step, step); - memzero(buf + 9*step, step); - } else - assert_not_reached("here"); - - return buf; -} - -static void test_compress_decompress(const char* label, const char* type, - compress_t compress, decompress_t decompress) { - usec_t n, n2 = 0; - float dt; - - _cleanup_free_ char *text, *buf; - _cleanup_free_ void *buf2 = NULL; - size_t buf2_allocated = 0; - size_t skipped = 0, compressed = 0, total = 0; - - text = make_buf(MAX_SIZE, type); - buf = calloc(MAX_SIZE + 1, 1); - assert_se(text && buf); - - n = now(CLOCK_MONOTONIC); - - for (size_t i = 0; i <= MAX_SIZE; i++) { - size_t j = 0, k = 0, size; - int r; - - size = permute(i); - if (size == 0) - continue; - - log_debug("%s %zu %zu", type, i, size); - - memzero(buf, MIN(size + 1000, MAX_SIZE)); - - r = compress(text, size, buf, size, &j); - /* assume compression must be successful except for small or random inputs */ - assert_se(r == 0 || (size < 2048 && r == -ENOBUFS) || streq(type, "random")); - - /* check for overwrites */ - assert_se(buf[size] == 0); - if (r != 0) { - skipped += size; - continue; - } - - assert_se(j > 0); - if (j >= size) - log_error("%s \"compressed\" %zu -> %zu", label, size, j); - - r = decompress(buf, j, &buf2, &buf2_allocated, &k, 0); - assert_se(r == 0); - assert_se(buf2_allocated >= k); - assert_se(k == size); - - assert_se(memcmp(text, buf2, size) == 0); - - total += size; - compressed += j; - - n2 = now(CLOCK_MONOTONIC); - if (n2 - n > arg_duration) - break; - } - - dt = (n2-n) / 1e6; - - log_info("%s/%s: compressed & decompressed %zu bytes in %.2fs (%.2fMiB/s), " - "mean compresion %.2f%%, skipped %zu bytes", - label, type, total, dt, - total / 1024. / 1024 / dt, - 100 - compressed * 100. / total, - skipped); -} - -int main(int argc, char *argv[]) { - const char *i; - - log_set_max_level(LOG_INFO); - - if (argc >= 2) { - unsigned x; - - assert_se(safe_atou(argv[1], &x) >= 0); - arg_duration = x * USEC_PER_SEC; - } - if (argc == 3) - (void) safe_atozu(argv[2], &arg_start); - else - arg_start = getpid(); - - NULSTR_FOREACH(i, "zeros\0simple\0random\0") { -#ifdef HAVE_XZ - test_compress_decompress("XZ", i, compress_blob_xz, decompress_blob_xz); -#endif -#ifdef HAVE_LZ4 - test_compress_decompress("LZ4", i, compress_blob_lz4, decompress_blob_lz4); -#endif - } - return 0; -} |