[Ltp-cvs] ltp/testcases/realtime/lib librttest.c,1.7,1.8

[Subrata <sub...@us...>]

Update of /cvsroot/ltp/ltp/testcases/realtime/lib
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv21791/ltp/testcases/realtime/lib

Modified Files:
	librttest.c 
Log Message:
First patch regroups TSC functions and macros definition into librttest. Second patch is to have an atomic reading of the 64-bit timebase register of powerpc64. This new function is only valid if -m64 is used when compiling the whole testcase suite with a powerpc64. Thirs patch is a fix to avoid spurious tsc_minus warning. These patches been tested on a ppc64 machine either with 32 or 64 bit binaries. (-m64). 
The same TSC read (rdtscll) macros and tsc_minus where implemented in three different tests. This patch put all this into librttest.*. Signed-off-by: Gilles Carry <gil...@bu...>. Cc: Tim Chavez <ti...@us...>. Acked-by: Darren Hart <dv...@us...>.


Index: librttest.c
===================================================================
RCS file: /cvsroot/ltp/ltp/testcases/realtime/lib/librttest.c,v
retrieving revision 1.7
retrieving revision 1.8
diff -C2 -d -r1.7 -r1.8
*** librttest.c	3 Jun 2008 13:14:28 -0000	1.7
--- librttest.c	25 Jul 2008 00:10:56 -0000	1.8
***************
*** 399,402 ****
--- 399,415 ----
  }
  
+ /* return difference in microseconds */
+ unsigned long long tsc_minus(unsigned long long tsc_start, unsigned long long tsc_end)
+ {
+ 	unsigned long long delta;
+ 	if (tsc_start < tsc_end)
+ 		delta = tsc_end - tsc_start;
+ 	else {
+ 		delta = ULL_MAX - (tsc_end - tsc_start) + 1;
+ 		printf("TSC wrapped, delta=%llu\n", delta);
+ 	}
+ 	return delta;
+ }
+ 
  void rt_nanosleep_until(nsec_t ns) {
  	struct timespec ts_sleep, ts_rem;