Michael,
userspace/perftests patch to add use of asm/timex.h to get_clock.h
Andi Kleen agrees this the best way to pick up get_cycles().
PPC64 has a clean timex.h. PPC does not.
thanks,
grant
Signed-off-by: Grant Grundler <[EMAIL PROTECTED]>
Index: get_clock.h
===================================================================
--- get_clock.h (revision 2296)
+++ get_clock.h (working copy)
@@ -31,8 +31,10 @@
*
* $Id$
*/
+
#include <unistd.h>
#include <stdio.h>
+
#if defined (__x86_64__) || defined(__i386__)
typedef unsigned long long cycles_t;
static inline cycles_t get_clock()
@@ -44,7 +46,12 @@ static inline cycles_t get_clock()
val = (val << 32) | low;
return val;
}
-#elif defined(__PPC64__)
+
+#elif defined(__PPC__)
+/* PPC (32-bit) only provides a kernel version of get_cycles().
+ * Which implies some PPC (32-bit) do not support mftb.
+ * Use at your own risk.
+ */
typedef unsigned long long cycles_t;
static inline cycles_t get_cycles()
{
@@ -53,17 +60,12 @@ static inline cycles_t get_cycles()
asm volatile ("mftb %0" : "=r" (ret) : );
return ret;
}
-#elif defined(__ia64__)
-typedef unsigned long long cycles_t;
-static inline cycles_t get_cycles()
-{
- cycles_t ret;
- asm volatile ("mov %0=ar.itc" : "=r"(ret));
- return ret;
-}
#else
-#warning get_clock not implemented for this architecture
+
+/* Everyone else has nice timex.h */
+#include <asm/timex.h>
+
#endif
double get_cpu_mhz()
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