diff options
Diffstat (limited to 'benchtests/bench-strcmp.c')
| -rw-r--r-- | benchtests/bench-strcmp.c | 142 |
1 files changed, 102 insertions, 40 deletions
diff --git a/benchtests/bench-strcmp.c b/benchtests/bench-strcmp.c index 387e76fcfb..3a60edfb15 100644 --- a/benchtests/bench-strcmp.c +++ b/benchtests/bench-strcmp.c @@ -99,8 +99,8 @@ do_one_test (json_ctx_t *json_ctx, impl_t *impl, } static void -do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len, int - max_char, int exp_result) +do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len, + int max_char, int exp_result, int at_end) { size_t i; @@ -109,19 +109,28 @@ do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len, int if (len == 0) return; - align1 &= 63; + align1 &= ~(CHARBYTES - 1); + align2 &= ~(CHARBYTES - 1); + + align1 &= (getpagesize () - 1); if (align1 + (len + 1) * CHARBYTES >= page_size) return; - align2 &= 63; + align2 &= (getpagesize () - 1); if (align2 + (len + 1) * CHARBYTES >= page_size) return; /* Put them close to the end of page. */ - i = align1 + CHARBYTES * (len + 2); - s1 = (CHAR *) (buf1 + ((page_size - i) / 16 * 16) + align1); - i = align2 + CHARBYTES * (len + 2); - s2 = (CHAR *) (buf2 + ((page_size - i) / 16 * 16) + align2); + if (at_end) + { + i = align1 + CHARBYTES * (len + 2); + align1 = ((page_size - i) / 16 * 16) + align1; + i = align2 + CHARBYTES * (len + 2); + align2 = ((page_size - i) / 16 * 16) + align2; + } + + s1 = (CHAR *)(buf1 + align1); + s2 = (CHAR *)(buf2 + align2); for (i = 0; i < len; i++) s1[i] = s2[i] = 1 + (23 << ((CHARBYTES - 1) * 8)) * i % max_char; @@ -132,9 +141,9 @@ do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len, int s2[len - 1] -= exp_result; json_element_object_begin (json_ctx); - json_attr_uint (json_ctx, "length", (double) len); - json_attr_uint (json_ctx, "align1", (double) align1); - json_attr_uint (json_ctx, "align2", (double) align2); + json_attr_uint (json_ctx, "length", (double)len); + json_attr_uint (json_ctx, "align1", (double)align1); + json_attr_uint (json_ctx, "align2", (double)align2); json_array_begin (json_ctx, "timings"); FOR_EACH_IMPL (impl, 0) @@ -202,7 +211,8 @@ int test_main (void) { json_ctx_t json_ctx; - size_t i; + size_t i, j, k; + size_t pg_sz = getpagesize (); test_init (); @@ -221,36 +231,88 @@ test_main (void) json_array_end (&json_ctx); json_array_begin (&json_ctx, "results"); - - for (i = 1; i < 32; ++i) - { - do_test (&json_ctx, CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, 0); - do_test (&json_ctx, CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, 1); - do_test (&json_ctx, CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, -1); - } - - for (i = 1; i < 10 + CHARBYTESLOG; ++i) + for (k = 0; k < 2; ++k) { - do_test (&json_ctx, 0, 0, 2 << i, MIDCHAR, 0); - do_test (&json_ctx, 0, 0, 2 << i, LARGECHAR, 0); - do_test (&json_ctx, 0, 0, 2 << i, MIDCHAR, 1); - do_test (&json_ctx, 0, 0, 2 << i, LARGECHAR, 1); - do_test (&json_ctx, 0, 0, 2 << i, MIDCHAR, -1); - do_test (&json_ctx, 0, 0, 2 << i, LARGECHAR, -1); - do_test (&json_ctx, 0, CHARBYTES * i, 2 << i, MIDCHAR, 1); - do_test (&json_ctx, CHARBYTES * i, CHARBYTES * (i + 1), 2 << i, LARGECHAR, 1); + for (i = 1; i < 32; ++i) + { + do_test (&json_ctx, CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, 0, k); + do_test (&json_ctx, CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, 1, k); + do_test (&json_ctx, CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, -1, k); + } + + for (i = 1; i <= 8192;) + { + /* No page crosses. */ + do_test (&json_ctx, 0, 0, i, MIDCHAR, 0, k); + do_test (&json_ctx, i * CHARBYTES, 0, i, MIDCHAR, 0, k); + do_test (&json_ctx, 0, i * CHARBYTES, i, MIDCHAR, 0, k); + + /* False page crosses. */ + do_test (&json_ctx, pg_sz / 2, pg_sz / 2 - CHARBYTES, i, MIDCHAR, 0, + k); + do_test (&json_ctx, pg_sz / 2 - CHARBYTES, pg_sz / 2, i, MIDCHAR, 0, + k); + + do_test (&json_ctx, pg_sz - (i * CHARBYTES), 0, i, MIDCHAR, 0, k); + do_test (&json_ctx, 0, pg_sz - (i * CHARBYTES), i, MIDCHAR, 0, k); + + /* Real page cross. */ + for (j = 16; j < 128; j += 16) + { + do_test (&json_ctx, pg_sz - j, 0, i, MIDCHAR, 0, k); + do_test (&json_ctx, 0, pg_sz - j, i, MIDCHAR, 0, k); + + do_test (&json_ctx, pg_sz - j, pg_sz - j / 2, i, MIDCHAR, 0, k); + do_test (&json_ctx, pg_sz - j / 2, pg_sz - j, i, MIDCHAR, 0, k); + } + + if (i < 32) + { + ++i; + } + else if (i < 160) + { + i += 8; + } + else if (i < 512) + { + i += 32; + } + else + { + i *= 2; + } + } + + for (i = 1; i < 10 + CHARBYTESLOG; ++i) + { + do_test (&json_ctx, 0, 0, 2 << i, MIDCHAR, 0, k); + do_test (&json_ctx, 0, 0, 2 << i, LARGECHAR, 0, k); + do_test (&json_ctx, 0, 0, 2 << i, MIDCHAR, 1, k); + do_test (&json_ctx, 0, 0, 2 << i, LARGECHAR, 1, k); + do_test (&json_ctx, 0, 0, 2 << i, MIDCHAR, -1, k); + do_test (&json_ctx, 0, 0, 2 << i, LARGECHAR, -1, k); + do_test (&json_ctx, 0, CHARBYTES * i, 2 << i, MIDCHAR, 1, k); + do_test (&json_ctx, CHARBYTES * i, CHARBYTES * (i + 1), 2 << i, + LARGECHAR, 1, k); + } + + for (i = 1; i < 8; ++i) + { + do_test (&json_ctx, CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, + MIDCHAR, 0, k); + do_test (&json_ctx, 2 * CHARBYTES * i, CHARBYTES * i, 8 << i, + LARGECHAR, 0, k); + do_test (&json_ctx, CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, + MIDCHAR, 1, k); + do_test (&json_ctx, 2 * CHARBYTES * i, CHARBYTES * i, 8 << i, + LARGECHAR, 1, k); + do_test (&json_ctx, CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, + MIDCHAR, -1, k); + do_test (&json_ctx, 2 * CHARBYTES * i, CHARBYTES * i, 8 << i, + LARGECHAR, -1, k); + } } - - for (i = 1; i < 8; ++i) - { - do_test (&json_ctx, CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, MIDCHAR, 0); - do_test (&json_ctx, 2 * CHARBYTES * i, CHARBYTES * i, 8 << i, LARGECHAR, 0); - do_test (&json_ctx, CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, MIDCHAR, 1); - do_test (&json_ctx, 2 * CHARBYTES * i, CHARBYTES * i, 8 << i, LARGECHAR, 1); - do_test (&json_ctx, CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, MIDCHAR, -1); - do_test (&json_ctx, 2 * CHARBYTES * i, CHARBYTES * i, 8 << i, LARGECHAR, -1); - } - do_test_page_boundary (&json_ctx); json_array_end (&json_ctx); |