mirror of
https://salsa.debian.org/xorg-team/lib/pixman
synced 2025-09-01 10:35:16 +00:00
b31a696263
Wallclock time for running pixman "make check" (compile time not included):
----------------------------+----------------+-----------------------------+
| old PRNG (LCG) | new PRNG (Bob Jenkins) |
Processor type +----------------+------------+----------------+
| gcc 4.5 | gcc 4.5 | gcc 4.7 (simd) |
----------------------------+----------------+------------+----------------+
quad Intel Core i7 @2.8GHz | 0m49.494s | 0m43.722s | 0m37.560s |
dual ARM Cortex-A15 @1.7GHz | 5m8.465s | 4m37.375s | 3m45.819s |
IBM Cell PPU @3.2GHz | 23m0.821s | 20m38.316s | 16m37.513s |
----------------------------+----------------+------------+----------------+
But some tests got a particularly large boost. For example benchmarking and
profiling blitters-test on Core i7:
=== before ===
$ time ./blitters-test
real 0m10.907s
user 0m55.650s
sys 0m0.000s
70.45% blitters-test blitters-test [.] create_random_image
15.81% blitters-test blitters-test [.] compute_crc32_for_image_internal
2.26% blitters-test blitters-test [.] _pixman_implementation_lookup_composite
1.07% blitters-test libc-2.15.so [.] _int_free
0.89% blitters-test libc-2.15.so [.] malloc_consolidate
0.87% blitters-test libc-2.15.so [.] _int_malloc
0.75% blitters-test blitters-test [.] combine_conjoint_general_u
0.61% blitters-test blitters-test [.] combine_disjoint_general_u
0.40% blitters-test blitters-test [.] test_composite
0.31% blitters-test libc-2.15.so [.] _int_memalign
0.31% blitters-test blitters-test [.] _pixman_bits_image_setup_accessors
0.28% blitters-test libc-2.15.so [.] malloc
=== after ===
$ time ./blitters-test
real 0m3.655s
user 0m20.550s
sys 0m0.000s
41.77% blitters-test.n blitters-test.new [.] compute_crc32_for_image_internal
15.77% blitters-test.n blitters-test.new [.] prng_randmemset_r
6.15% blitters-test.n blitters-test.new [.] _pixman_implementation_lookup_composite
3.09% blitters-test.n libc-2.15.so [.] _int_free
2.68% blitters-test.n libc-2.15.so [.] malloc_consolidate
2.39% blitters-test.n libc-2.15.so [.] _int_malloc
2.27% blitters-test.n blitters-test.new [.] create_random_image
2.22% blitters-test.n blitters-test.new [.] combine_conjoint_general_u
1.52% blitters-test.n blitters-test.new [.] combine_disjoint_general_u
1.40% blitters-test.n blitters-test.new [.] test_composite
1.02% blitters-test.n blitters-test.new [.] prng_srand_r
1.00% blitters-test.n blitters-test.new [.] _pixman_image_validate
0.96% blitters-test.n blitters-test.new [.] _pixman_bits_image_setup_accessors
0.90% blitters-test.n libc-2.15.so [.] malloc
35 lines
983 B
C
35 lines
983 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include "utils.h"
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#define WIDTH 400
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#define HEIGHT 200
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int
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main (int argc, char **argv)
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{
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uint8_t *alpha;
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uint32_t *src, *dest;
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prng_srand (0);
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alpha = make_random_bytes (WIDTH * HEIGHT);
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src = (uint32_t *)make_random_bytes (WIDTH * HEIGHT * 4);
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dest = (uint32_t *)make_random_bytes (WIDTH * HEIGHT * 4);
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pixman_image_t *a = pixman_image_create_bits (PIXMAN_a8, WIDTH, HEIGHT, (uint32_t *)alpha, WIDTH);
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pixman_image_t *d = pixman_image_create_bits (PIXMAN_a8r8g8b8, WIDTH, HEIGHT, dest, WIDTH * 4);
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pixman_image_t *s = pixman_image_create_bits (PIXMAN_a2r10g10b10, WIDTH, HEIGHT, src, WIDTH * 4);
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fail_after (5, "Infinite loop detected: 5 seconds without progress\n");
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pixman_image_set_alpha_map (s, a, 0, 0);
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pixman_image_set_alpha_map (a, s, 0, 0);
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pixman_image_composite (PIXMAN_OP_SRC, s, NULL, d, 0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
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pixman_image_unref (s);
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return 0;
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}
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