mirror of
https://github.com/xen-project/xen.git
synced 2026-10-28 18:21:39 +01:00
rneugeba@wyvis.research.intel-research.net
3bd36ccc50
forward ported James Bulpin's performance counters tool Signed-off-by: michael.fetterman@cl.cam.ac.uk
42 lines
1.0 KiB
C
42 lines
1.0 KiB
C
/*
|
|
* Interface to JRB44's /proc/perfcntr interface.
|
|
*
|
|
* $Id: cpuperf_perfcntr.h,v 1.1 2003/10/13 16:49:44 jrb44 Exp $
|
|
*
|
|
* $Log: cpuperf_perfcntr.h,v $
|
|
* Revision 1.1 2003/10/13 16:49:44 jrb44
|
|
* Initial revision
|
|
*
|
|
*/
|
|
|
|
#define PROC_PERFCNTR "/proc/perfcntr"
|
|
|
|
static inline void perfcntr_wrmsr(int cpu_mask,
|
|
int msr,
|
|
unsigned int low,
|
|
unsigned int high )
|
|
{
|
|
FILE *fd;
|
|
unsigned long long value = low | (((unsigned long long)high) << 32);
|
|
|
|
fd = fopen(PROC_PERFCNTR, "w");
|
|
if (fd == NULL)
|
|
{
|
|
perror("open " PROC_PERFCNTR);
|
|
exit(1);
|
|
}
|
|
|
|
fprintf(fd, "%x %x %llx \n", cpu_mask, msr, value);
|
|
fprintf(stderr, "%x %x %llx \n", cpu_mask, msr, value);
|
|
fclose(fd);
|
|
}
|
|
|
|
static inline unsigned long long perfcntr_rdmsr( int cpu_mask, int msr )
|
|
{
|
|
fprintf(stderr, "WARNING: rdmsr not yet implemented for perfcntr.\n");
|
|
return 0;
|
|
}
|
|
|
|
// End of $RCSfile: cpuperf_perfcntr.h,v $
|
|
|