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benchtests: Reallocate buffers for every test run

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Keeping the buffers the same across test runs gives later invocations
the advantage since they access cached data.  Reallocate so that all
test runs are on equal grounds.

	* benchtests/bench-memcmp.c (do_test): Call realloc_buf for
	every test run.
This commit is contained in:
Siddhesh Poyarekar 2018-02-02 09:55:45 +05:30
parent 39f898c692
commit 3dfcbfa1a4
2 changed files with 19 additions and 11 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2018-02-02 Siddhesh Poyarekar <siddhesh@sourceware.org>
* benchtests/bench-memcmp.c (do_test): Call realloc_buf for
every test run.
2018-02-01 Joseph Myers <joseph@codesourcery.com>
* sysdeps/unix/sysv/linux/syscall-names.list: Update kernel

25
benchtests/bench-memcmp.c
View File

@ -110,20 +110,23 @@ do_test (size_t align1, size_t align2, size_t len, int exp_result)
if (align2 + (len + 1) * CHARBYTES >= page_size)
return;
s1 = (CHAR *) (buf1 + align1);
s2 = (CHAR *) (buf2 + align2);
for (i = 0; i < len; i++)
s1[i] = s2[i] = 1 + (23 << ((CHARBYTES - 1) * 8)) * i % CHAR__MAX;
s1[len] = align1;
s2[len] = align2;
s2[len - 1] -= exp_result;
printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, s1, s2, len, exp_result);
{
s1 = (CHAR *) (buf1 + align1);
s2 = (CHAR *) (buf2 + align2);
for (i = 0; i < len; i++)
s1[i] = s2[i] = 1 + (23 << ((CHARBYTES - 1) * 8)) * i % CHAR__MAX;
s1[len] = align1;
s2[len] = align2;
s2[len - 1] -= exp_result;
do_one_test (impl, s1, s2, len, exp_result);
realloc_bufs ();
}
putchar ('\n');
}