/* Measure memcpy performance.
- Copyright (C) 2016-2017 Free Software Foundation, Inc.
+ Copyright (C) 2016-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
+ <https://www.gnu.org/licenses/>. */
-#define MIN_PAGE_SIZE 131072
+#define MIN_SIZE 32768
+#define MAX_SIZE (1024*1024)
+#define NUM_TESTS 16384
+
+#define MIN_PAGE_SIZE (MAX_SIZE + getpagesize())
#define TEST_MAIN
#define TEST_NAME "memcpy"
#include "bench-string.h"
IMPL (memcpy, 1)
-#define NUM_COPIES 4096
-
typedef struct { uint16_t size; uint16_t freq; } freq_data_t;
-typedef struct { uint8_t align; uint8_t freq; } align_data_t;
+typedef struct { uint8_t align; uint16_t freq; } align_data_t;
-#define SIZE_NUM 1024
+#define SIZE_NUM 65536
#define SIZE_MASK (SIZE_NUM-1)
static uint8_t size_arr[SIZE_NUM];
-/* Frequency data for memcpy of less than 256 bytes based on SPEC2006. */
+/* Frequency data for memcpy of less than 4096 bytes based on SPEC2017. */
static freq_data_t size_freq[] =
{
- { 8, 576}, {104, 94}, { 24, 78}, { 48, 58}, { 32, 48}, { 16, 46},
- { 1, 30}, { 96, 12}, { 72, 11}, {216, 11}, {192, 8}, { 12, 7},
- {144, 5}, { 2, 4}, { 64, 4}, {120, 4}, { 4, 3}, { 40, 2},
- { 7, 2}, {168, 2}, {160, 2}, {128, 1}, { 3, 1}, { 9, 1},
- {176, 1}, {240, 1}, { 11, 1}, { 0, 1}, { 5, 1}, { 6, 1},
- { 80, 1}, { 52, 1}, {152, 1}, { 10, 1}, { 56, 1}, { 51, 1},
- { 14, 1}, {208, 1}, { 0, 0}
+{32,22320}, { 16,9554}, { 8,8915}, {152,5327}, { 4,2159}, {292,2035},
+{ 12,1608}, { 24,1343}, {1152,895}, {144, 813}, {884, 733}, {284, 721},
+{120, 661}, { 2, 649}, {882, 550}, { 5, 475}, { 7, 461}, {108, 460},
+{ 10, 361}, { 9, 361}, { 6, 334}, { 3, 326}, {464, 308}, {2048,303},
+{ 1, 298}, { 64, 250}, { 11, 197}, {296, 194}, { 68, 187}, { 15, 185},
+{192, 184}, {1764,183}, { 13, 173}, {560, 126}, {160, 115}, {288, 96},
+{104, 96}, {1144, 83}, { 18, 80}, { 23, 78}, { 40, 77}, { 19, 68},
+{ 48, 63}, { 17, 57}, { 72, 54}, {1280, 51}, { 20, 49}, { 28, 47},
+{ 22, 46}, {640, 45}, { 25, 41}, { 14, 40}, { 56, 37}, { 27, 35},
+{ 35, 33}, {384, 33}, { 29, 32}, { 80, 30}, {4095, 22}, {232, 22},
+{ 36, 19}, {184, 17}, { 21, 17}, {256, 16}, { 44, 15}, { 26, 15},
+{ 31, 14}, { 88, 14}, {176, 13}, { 33, 12}, {1024, 12}, {208, 11},
+{ 62, 11}, {128, 10}, {704, 10}, {324, 10}, { 96, 10}, { 60, 9},
+{136, 9}, {124, 9}, { 34, 8}, { 30, 8}, {480, 8}, {1344, 8},
+{273, 7}, {520, 7}, {112, 6}, { 52, 6}, {344, 6}, {336, 6},
+{504, 5}, {168, 5}, {424, 5}, { 0, 4}, { 76, 3}, {200, 3},
+{512, 3}, {312, 3}, {240, 3}, {960, 3}, {264, 2}, {672, 2},
+{ 38, 2}, {328, 2}, { 84, 2}, { 39, 2}, {216, 2}, { 42, 2},
+{ 37, 2}, {1608, 2}, { 70, 2}, { 46, 2}, {536, 2}, {280, 1},
+{248, 1}, { 47, 1}, {1088, 1}, {1288, 1}, {224, 1}, { 41, 1},
+{ 50, 1}, { 49, 1}, {808, 1}, {360, 1}, {440, 1}, { 43, 1},
+{ 45, 1}, { 78, 1}, {968, 1}, {392, 1}, { 54, 1}, { 53, 1},
+{ 59, 1}, {376, 1}, {664, 1}, { 58, 1}, {272, 1}, { 66, 1},
+{2688, 1}, {472, 1}, {568, 1}, {720, 1}, { 51, 1}, { 63, 1},
+{ 86, 1}, {496, 1}, {776, 1}, { 57, 1}, {680, 1}, {792, 1},
+{122, 1}, {760, 1}, {824, 1}, {552, 1}, { 67, 1}, {456, 1},
+{984, 1}, { 74, 1}, {408, 1}, { 75, 1}, { 92, 1}, {576, 1},
+{116, 1}, { 65, 1}, {117, 1}, { 82, 1}, {352, 1}, { 55, 1},
+{100, 1}, { 90, 1}, {696, 1}, {111, 1}, {880, 1}, { 79, 1},
+{488, 1}, { 61, 1}, {114, 1}, { 94, 1}, {1032, 1}, { 98, 1},
+{ 87, 1}, {584, 1}, { 85, 1}, {648, 1}, {0, 0}
};
-#define ALIGN_NUM 256
+#define ALIGN_NUM 1024
#define ALIGN_MASK (ALIGN_NUM-1)
static uint8_t src_align_arr[ALIGN_NUM];
static uint8_t dst_align_arr[ALIGN_NUM];
-/* Source alignment frequency for memcpy based on SPEC2006. */
+/* Source alignment frequency for memcpy based on SPEC2017. */
static align_data_t src_align_freq[] =
{
- {16, 144}, {8, 86}, {3, 23}, {1, 3}, {0, 0}
+ {8, 300}, {16, 292}, {32, 168}, {64, 153}, {4, 79}, {2, 14}, {1, 18}, {0, 0}
};
-/* Destination alignment frequency for memcpy based on SPEC2006. */
+/* Destination alignment frequency for memcpy based on SPEC2017. */
static align_data_t dst_align_freq[] =
{
- {16, 197}, {8, 30}, {3, 23}, {1, 6}, {0, 0}
+ {8, 265}, {16, 263}, {64, 209}, {32, 174}, {4, 90}, {2, 10}, {1, 13}, {0, 0}
};
typedef struct
{
- uint16_t src;
- uint16_t dst;
- uint16_t len;
+ uint64_t src : 24;
+ uint64_t dst : 24;
+ uint64_t len : 16;
} copy_t;
-static copy_t copy[NUM_COPIES];
+static copy_t test_arr[NUM_TESTS];
typedef char *(*proto_t) (char *, const char *, size_t);
copy_t *copy, size_t n)
{
timing_t start, stop, cur;
- size_t iters = INNER_LOOP_ITERS * 20;
+ size_t iters = INNER_LOOP_ITERS_MEDIUM / 2;
+
+ for (int j = 0; j < n; j++)
+ CALL (impl, dst + copy[j].dst, src + copy[j].src, copy[j].len);
TIMING_NOW (start);
for (int i = 0; i < iters; ++i)
static void
do_test (json_ctx_t *json_ctx, size_t max_size)
{
- for (int i = 0; i < max_size; i++)
- buf1[i] = i * 3;
+ int i;
+
+ memset (buf1, 1, max_size);
/* Create a random set of copies with the given size and alignment
distributions. */
- for (int i = 0; i < NUM_COPIES; i++)
+ for (i = 0; i < NUM_TESTS; i++)
{
- copy[i].dst = (rand () & (max_size - 1)) | 1;
- copy[i].dst &= ~dst_align_arr[rand () & ALIGN_MASK];
- copy[i].src = (rand () & (max_size - 1)) | 3;
- copy[i].src &= ~src_align_arr[rand () & ALIGN_MASK];
- copy[i].len = size_arr[rand () & SIZE_MASK];
+ test_arr[i].dst = (rand () & (max_size - 1));
+ test_arr[i].dst &= ~dst_align_arr[rand () & ALIGN_MASK];
+ test_arr[i].src = (rand () & (max_size - 1));
+ test_arr[i].src &= ~src_align_arr[rand () & ALIGN_MASK];
+ test_arr[i].len = size_arr[rand () & SIZE_MASK];
}
json_element_object_begin (json_ctx);
- json_attr_uint (json_ctx, "max-size", (double) max_size);
+ json_attr_uint (json_ctx, "length", (double) max_size);
json_array_begin (json_ctx, "timings");
FOR_EACH_IMPL (impl, 0)
- do_one_test (json_ctx, impl, (char *) buf2, (char *) buf1, copy, NUM_COPIES);
+ do_one_test (json_ctx, impl, (char *) buf2, (char *) buf1, test_arr, i);
json_array_end (json_ctx);
json_element_object_end (json_ctx);
json_array_end (&json_ctx);
json_array_begin (&json_ctx, "results");
- for (int i = 4; i <= 64; i = i * 2)
- do_test (&json_ctx, i * 1024);
+ for (int i = MIN_SIZE; i <= MAX_SIZE; i = i * 2)
+ do_test (&json_ctx, i);
json_array_end (&json_ctx);
json_attr_object_end (&json_ctx);
projects / thirdparty / glibc.git / blobdiff