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-rw-r--r--src/journal/test-compress-benchmark.c83
1 files changed, 65 insertions, 18 deletions
diff --git a/src/journal/test-compress-benchmark.c b/src/journal/test-compress-benchmark.c
index 0be6820a14..782b85db26 100644
--- a/src/journal/test-compress-benchmark.c
+++ b/src/journal/test-compress-benchmark.c
@@ -1,3 +1,5 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
/***
This file is part of systemd
@@ -26,7 +28,28 @@ typedef int (compress_t)(const void *src, uint64_t src_size, void *dst, size_t *
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;
@@ -41,11 +64,18 @@ static char* make_buf(size_t count, const char *type) {
for (i = 0; i < count; i++)
buf[i] = 'a' + i % ('z' - 'a' + 1);
else if (streq(type, "random")) {
- random_bytes(buf, count/10);
- random_bytes(buf + 2*count/10, count/10);
- random_bytes(buf + 4*count/10, count/20);
- random_bytes(buf + 6*count/10, count/20);
- random_bytes(buf + 8*count/10, count/20);
+ 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");
@@ -68,37 +98,43 @@ static void test_compress_decompress(const char* label, const char* type,
n = now(CLOCK_MONOTONIC);
- for (size_t i = 1; i <= MAX_SIZE; i += (i < 2048 ? 1 : 217)) {
- size_t j = 0, k = 0;
+ for (size_t i = 0; i <= MAX_SIZE; i++) {
+ size_t j = 0, k = 0, size;
int r;
- r = compress(text, i, buf, &j);
+ size = permute(i);
+
+ log_debug("%s %zu %zu", type, i, size);
+
+ memzero(buf, MIN(size + 1000, MAX_SIZE));
+
+ r = compress(text, size, buf, &j);
/* assume compression must be successful except for small inputs */
- assert_se(r == 0 || (i < 2048 && r == -ENOBUFS) || streq(type, "random"));
+ assert_se(r == 0 || (size < 2048 && r == -ENOBUFS) || streq(type, "random"));
/* check for overwrites */
- assert_se(buf[i] == 0);
+ assert_se(buf[size] == 0);
if (r != 0) {
- skipped += i;
+ skipped += size;
continue;
}
assert_se(j > 0);
- if (j >= i)
- log_error("%s \"compressed\" %zu -> %zu", label, i, j);
+ 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 == i);
+ assert_se(k == size);
- assert_se(memcmp(text, buf2, i) == 0);
+ assert_se(memcmp(text, buf2, size) == 0);
- total += i;
+ total += size;
compressed += j;
n2 = now(CLOCK_MONOTONIC);
- if (n2 - n > 60 * USEC_PER_SEC)
+ if (n2 - n > arg_duration)
break;
}
@@ -115,7 +151,18 @@ static void test_compress_decompress(const char* label, const char* type,
int main(int argc, char *argv[]) {
const char *i;
- log_set_max_level(LOG_DEBUG);
+ 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_atolu(argv[2], &arg_start);
+ else
+ arg_start = getpid();
NULSTR_FOREACH(i, "zeros\0simple\0random\0") {
#ifdef HAVE_XZ