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#ifndef __XEN_PERFC_H__
#define __XEN_PERFC_H__
#ifdef PERF_COUNTERS
#include <xen/lib.h>
#include <xen/smp.h>
#include <xen/percpu.h>
/*
* NOTE: new counters must be defined in perfc_defn.h
*
* Counter declarations:
* PERFCOUNTER (counter, string) define a new performance counter
* PERFCOUNTER_ARRAY (counter, string, size) define an array of counters
*
* Unlike counters, status variables do not reset:
* PERFSTATUS (counter, string) define a new performance stauts
* PERFSTATUS_ARRAY (counter, string, size) define an array of status vars
*
* unsigned long perfc_value (counter) get value of a counter
* unsigned long perfc_valuea (counter, index) get value of an array counter
* unsigned long perfc_set (counter, val) set value of a counter
* unsigned long perfc_seta (counter, index, val) set value of an array counter
* void perfc_incr (counter) increment a counter
* void perfc_decr (counter) decrement a status
* void perfc_incra (counter, index) increment an array counter
* void perfc_add (counter, value) add a value to a counter
* void perfc_adda (counter, index, value) add a value to array counter
* void perfc_print (counter) print out the counter
*/
#define PERFCOUNTER( name, descr ) \
PERFC_##name,
#define PERFCOUNTER_ARRAY( name, descr, size ) \
PERFC_##name, \
PERFC_LAST_##name = PERFC_ ## name + (size) - sizeof(char[2 * !!(size) - 1]),
#define PERFSTATUS PERFCOUNTER
#define PERFSTATUS_ARRAY PERFCOUNTER_ARRAY
enum perfcounter {
#include <xen/perfc_defn.h>
NUM_PERFCOUNTERS
};
#undef PERFCOUNTER
#undef PERFCOUNTER_ARRAY
#undef PERFSTATUS
#undef PERFSTATUS_ARRAY
typedef unsigned perfc_t;
#define PRIperfc ""
DECLARE_PER_CPU(perfc_t[NUM_PERFCOUNTERS], perfcounters);
#define perfc_value(x) this_cpu(perfcounters)[PERFC_ ## x]
#define perfc_valuea(x,y) \
( (y) <= PERFC_LAST_ ## x - PERFC_ ## x ? \
this_cpu(perfcounters)[PERFC_ ## x + (y)] : 0 )
#define perfc_set(x,v) (this_cpu(perfcounters)[PERFC_ ## x] = (v))
#define perfc_seta(x,y,v) \
( (y) <= PERFC_LAST_ ## x - PERFC_ ## x ? \
this_cpu(perfcounters)[PERFC_ ## x + (y)] = (v) : (v) )
#define perfc_incr(x) (++this_cpu(perfcounters)[PERFC_ ## x])
#define perfc_decr(x) (--this_cpu(perfcounters)[PERFC_ ## x])
#define perfc_incra(x,y) \
( (y) <= PERFC_LAST_ ## x - PERFC_ ## x ? \
++this_cpu(perfcounters)[PERFC_ ## x + (y)] : 0 )
#define perfc_add(x,v) (this_cpu(perfcounters)[PERFC_ ## x] += (v))
#define perfc_adda(x,y,v) \
( (y) <= PERFC_LAST_ ## x - PERFC_ ## x ? \
this_cpu(perfcounters)[PERFC_ ## x + (y)] = (v) : (v) )
/*
* Histogram: special treatment for 0 and 1 count. After that equally spaced
* with last bucket taking the rest.
*/
#ifdef PERF_ARRAYS
#define perfc_incr_histo(x,v) \
do { \
if ( (v) == 0 ) \
perfc_incra(x, 0); \
else if ( (v) == 1 ) \
perfc_incra(x, 1); \
else if ( (((v) - 2) / PERFC_ ## x ## _BUCKET_SIZE) < \
(PERFC_LAST_ ## x - PERFC_ ## x - 2) ) \
perfc_incra(x, (((v) - 2) / PERFC_ ## x ## _BUCKET_SIZE) + 2); \
else \
perfc_incra(x, PERFC_LAST_ ## x - PERFC_ ## x); \
} while ( 0 )
#else
#define perfc_incr_histo(x,v) ((void)0)
#endif
struct xen_sysctl_perfc_op;
int perfc_control(struct xen_sysctl_perfc_op *);
extern void perfc_printall(unsigned char key);
extern void perfc_reset(unsigned char key);
#else /* PERF_COUNTERS */
#define perfc_value(x) (0)
#define perfc_valuea(x,y) (0)
#define perfc_set(x,v) ((void)0)
#define perfc_seta(x,y,v) ((void)0)
#define perfc_incr(x) ((void)0)
#define perfc_decr(x) ((void)0)
#define perfc_incra(x,y) ((void)0)
#define perfc_decra(x,y) ((void)0)
#define perfc_add(x,y) ((void)0)
#define perfc_adda(x,y,z) ((void)0)
#define perfc_incr_histo(x,y,z) ((void)0)
#endif /* PERF_COUNTERS */
#endif /* __XEN_PERFC_H__ */
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