Attachment 9872 Details for Bug 20038 – file.diff

[patch] file.diff

file.diff (text/plain), 1.83 KB, created by root on 2000-07-19 17:40:04 UTC

(hide)

Description:

Filename:

MIME Type:

Creator: root

Created: 2000-07-19 17:40:04 UTC

Size: 1.83 KB

patch

obsolete

>--- src/genarch.c	Thu Mar  9 03:40:41 2000
>+++ src/genarch.c	Wed Jul 19 09:37:30 2000
>@@ -43,11 +42,0 @@
>-private clock_t
>-time_clear(char *buf, int bsize, int nreps)
>-{
>-    clock_t t = clock();
>-    int i;
>-
>-    for (i = 0; i < nreps; ++i)
>-	memset(buf, 0, bsize);
>-    return clock() - t;
>-}
>-
>@@ -181,63 +170,2 @@
> #undef PRINT_MAX
>-
>-    section(f, "Cache sizes");
>-
>-    /*
>-     * Determine the primary and secondary cache sizes by looking for a
>-     * non-linearity in the time required to fill blocks with memset.
>-     */
>-    {
>-#define MAX_BLOCK (1 << 20)
>-	static char buf[MAX_BLOCK];
>-	int bsize = 1 << 10;
>-	int nreps = 1;
>-	clock_t t = 0;
>-	clock_t t_eps;
>-
>-	/*
>-	 * Increase the number of repetitions until the time is
>-	 * long enough to exceed the likely uncertainty.
>-	 */
>-
>-	while ((t = time_clear(buf, bsize, nreps)) == 0)
>-	    nreps <<= 1;
>-	t_eps = t;
>-	while ((t = time_clear(buf, bsize, nreps)) < t_eps * 10)
>-	    nreps <<= 1;
>-
>-	/*
>-	 * Increase the block size until the time jumps non-linearly.
>-	 */
>-	for (; bsize <= MAX_BLOCK;) {
>-	    clock_t dt = time_clear(buf, bsize, nreps);
>-
>-	    if (dt > t + (t >> 1)) {
>-		t = dt;
>-		break;
>-	    }
>-	    bsize <<= 1;
>-	    nreps >>= 1;
>-	    if (nreps == 0)
>-		nreps = 1, t <<= 1;
>-	}
>-	define_int(f, "ARCH_CACHE1_SIZE", bsize >> 1);
>-	/*
>-	 * Do the same thing a second time for the secondary cache.
>-	 */
>-	if (nreps > 1)
>-	    nreps >>= 1, t >>= 1;
>-	for (; bsize <= MAX_BLOCK;) {
>-	    clock_t dt = time_clear(buf, bsize, nreps);
>-
>-	    if (dt > t * 1.25) {
>-		t = dt;
>-		break;
>-	    }
>-	    bsize <<= 1;
>-	    nreps >>= 1;
>-	    if (nreps == 0)
>-		nreps = 1, t <<= 1;
>-	}
>-	define_int(f, "ARCH_CACHE2_SIZE", bsize >> 1);
>-    }
> 
>------- end of patches/patch-ac
>------- begin patches/patch-ad
>This patch replaces the use of the dangerous mktemp/fopen combo
>with the safe mkstemp/fdopen.

Actions: View | Diff

Attachments on bug 20038: 9872 | 9873 | 9874