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author | Simon Guo <wei.guo.simon@gmail.com> | 2018-06-07 09:57:55 +0800 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-07-24 22:03:22 +1000 |
commit | c827ac450d379f113b92663cbe5562643635c6b9 (patch) | |
tree | 0ceed7ce3d93d212c35355fe746e2f01358c2ac6 /tools/testing/selftests/powerpc/stringloops/memcmp.c | |
parent | c2a4e54e8b6a89dde574608c47e460a0371e44be (diff) | |
download | linux-next-c827ac450d379f113b92663cbe5562643635c6b9.tar.gz |
selftests/powerpc: Update memcmp_64 selftest for VMX implementation
This patch reworked selftest memcmp_64 so that memcmp selftest can
cover more test cases.
It adds testcases for:
- memcmp over 4K bytes size.
- s1/s2 with different/random offset on 16 bytes boundary.
- enter/exit_vmx_ops pairness.
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
[mpe: Add -maltivec to fix build on some toolchains]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'tools/testing/selftests/powerpc/stringloops/memcmp.c')
-rw-r--r-- | tools/testing/selftests/powerpc/stringloops/memcmp.c | 98 |
1 files changed, 76 insertions, 22 deletions
diff --git a/tools/testing/selftests/powerpc/stringloops/memcmp.c b/tools/testing/selftests/powerpc/stringloops/memcmp.c index 8250db25b379..b5cf71727b2d 100644 --- a/tools/testing/selftests/powerpc/stringloops/memcmp.c +++ b/tools/testing/selftests/powerpc/stringloops/memcmp.c @@ -2,20 +2,40 @@ #include <malloc.h> #include <stdlib.h> #include <string.h> +#include <time.h> #include "utils.h" #define SIZE 256 #define ITERATIONS 10000 +#define LARGE_SIZE (5 * 1024) +#define LARGE_ITERATIONS 1000 +#define LARGE_MAX_OFFSET 32 +#define LARGE_SIZE_START 4096 + +#define MAX_OFFSET_DIFF_S1_S2 48 + +int vmx_count; +int enter_vmx_ops(void) +{ + vmx_count++; + return 1; +} + +void exit_vmx_ops(void) +{ + vmx_count--; +} int test_memcmp(const void *s1, const void *s2, size_t n); /* test all offsets and lengths */ -static void test_one(char *s1, char *s2) +static void test_one(char *s1, char *s2, unsigned long max_offset, + unsigned long size_start, unsigned long max_size) { unsigned long offset, size; - for (offset = 0; offset < SIZE; offset++) { - for (size = 0; size < (SIZE-offset); size++) { + for (offset = 0; offset < max_offset; offset++) { + for (size = size_start; size < (max_size - offset); size++) { int x, y; unsigned long i; @@ -35,70 +55,104 @@ static void test_one(char *s1, char *s2) printf("\n"); abort(); } + + if (vmx_count != 0) { + printf("vmx enter/exit not paired.(offset:%ld size:%ld s1:%p s2:%p vc:%d\n", + offset, size, s1, s2, vmx_count); + printf("\n"); + abort(); + } } } } -static int testcase(void) +static int testcase(bool islarge) { char *s1; char *s2; unsigned long i; - s1 = memalign(128, SIZE); + unsigned long comp_size = (islarge ? LARGE_SIZE : SIZE); + unsigned long alloc_size = comp_size + MAX_OFFSET_DIFF_S1_S2; + int iterations = islarge ? LARGE_ITERATIONS : ITERATIONS; + + s1 = memalign(128, alloc_size); if (!s1) { perror("memalign"); exit(1); } - s2 = memalign(128, SIZE); + s2 = memalign(128, alloc_size); if (!s2) { perror("memalign"); exit(1); } - srandom(1); + srandom(time(0)); - for (i = 0; i < ITERATIONS; i++) { + for (i = 0; i < iterations; i++) { unsigned long j; unsigned long change; + char *rand_s1 = s1; + char *rand_s2 = s2; - for (j = 0; j < SIZE; j++) + for (j = 0; j < alloc_size; j++) s1[j] = random(); - memcpy(s2, s1, SIZE); + rand_s1 += random() % MAX_OFFSET_DIFF_S1_S2; + rand_s2 += random() % MAX_OFFSET_DIFF_S1_S2; + memcpy(rand_s2, rand_s1, comp_size); /* change one byte */ - change = random() % SIZE; - s2[change] = random() & 0xff; - - test_one(s1, s2); + change = random() % comp_size; + rand_s2[change] = random() & 0xff; + + if (islarge) + test_one(rand_s1, rand_s2, LARGE_MAX_OFFSET, + LARGE_SIZE_START, comp_size); + else + test_one(rand_s1, rand_s2, SIZE, 0, comp_size); } - srandom(1); + srandom(time(0)); - for (i = 0; i < ITERATIONS; i++) { + for (i = 0; i < iterations; i++) { unsigned long j; unsigned long change; + char *rand_s1 = s1; + char *rand_s2 = s2; - for (j = 0; j < SIZE; j++) + for (j = 0; j < alloc_size; j++) s1[j] = random(); - memcpy(s2, s1, SIZE); + rand_s1 += random() % MAX_OFFSET_DIFF_S1_S2; + rand_s2 += random() % MAX_OFFSET_DIFF_S1_S2; + memcpy(rand_s2, rand_s1, comp_size); /* change multiple bytes, 1/8 of total */ - for (j = 0; j < SIZE / 8; j++) { - change = random() % SIZE; + for (j = 0; j < comp_size / 8; j++) { + change = random() % comp_size; s2[change] = random() & 0xff; } - test_one(s1, s2); + if (islarge) + test_one(rand_s1, rand_s2, LARGE_MAX_OFFSET, + LARGE_SIZE_START, comp_size); + else + test_one(rand_s1, rand_s2, SIZE, 0, comp_size); } return 0; } +static int testcases(void) +{ + testcase(0); + testcase(1); + return 0; +} + int main(void) { - return test_harness(testcase, "memcmp"); + return test_harness(testcases, "memcmp"); } |