Author: ssp
Date: Sat Feb 16 15:54:40 2008
New Revision: 396
URL: http://svn.gnome.org/viewvc/sysprof?rev=396&view=rev
Log:
2008-02-16 Soren Sandmann <[EMAIL PROTECTED]>
* module/sysprof-module.c (nt_memcpy): Add a memcpy() that uses
nontemporal writes.
(copy_kernel_stack): Add commented-out use of it here.
Modified:
trunk/ChangeLog
trunk/module/sysprof-module.c
Modified: trunk/module/sysprof-module.c
==============================================================================
--- trunk/module/sysprof-module.c (original)
+++ trunk/module/sysprof-module.c Sat Feb 16 15:54:40 2008
@@ -112,6 +112,38 @@
return a > b ? b : a;
}
+static void
+nt_memcpy (void *dst, void *src, int n_bytes)
+{
+#if defined(CONFIG_X86_64) || defined(CONFIG_X86)
+ if (((unsigned long)dst & 3) ||
+ ((unsigned long)src & 3)) {
+ memcpy (dst, src, n_bytes);
+ }
+ else {
+ int i;
+ if ((unsigned long)src & 7) {
+ *(uint32_t *)dst = *(uint32_t *)src;
+ src += 4;
+ dst += 4;
+ }
+
+ for (i = 0; i < n_bytes; i += 8) {
+ __asm__ __volatile__ (
+ " movq (%0, %2), %%mm0\n"
+ " movntq %%mm0, (%1, %2)\n"
+ :
+ : "r" (src), "r" (dst), "r" (i)
+ : "memory");
+ }
+ __asm__ __volatile__ (
+ "emms\n");
+ }
+#else
+ memcpy (dst, src, n_bytes);
+#endif
+}
+
static struct pt_regs *
copy_kernel_stack (struct pt_regs *regs,
SysprofStackTrace *trace)
@@ -137,6 +169,9 @@
sizeof (trace->kernel_stack));
if (n_bytes > 0) {
+#if 0
+ nt_memcpy (&(trace->kernel_stack[1]), esp, n_bytes);
+#endif
memcpy (&(trace->kernel_stack[1]), esp, n_bytes);
trace->n_kernel_words += (n_bytes) / sizeof (void *);
@@ -203,7 +238,7 @@
if (vma && vma->vm_flags & VM_EXEC)
if (vma->vm_start <= x && x <= vma->vm_end)
- trace->addresses[j++] = x;
+ trace->addresses[j++] = (void *)x;
}
#if 0
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