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perf_counter: revamp syscall input ABI

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Impact: modify ABI

The hardware/software classification in hw_event->type became a little
strained due to the addition of tracepoint tracing.

Instead split up the field and provide a type field to explicitly specify
the counter type, while using the event_id field to specify which event to
use.

Raw counters still work as before, only the raw config now goes into
raw_event.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Orig-LKML-Reference: <20090319194233.836807573@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra
2009-03-19 20:26:18 +01:00
committed by Ingo Molnar
parent e077df4f43
commit b8e83514b6
4 changed files with 117 additions and 75 deletions
Download Patch File Download Diff File Expand all files Collapse all files

95
include/linux/perf_counter.h
View File

@ -21,56 +21,81 @@
*/
/*
* Generalized performance counter event types, used by the hw_event.type
* hw_event.type
*/
enum perf_event_types {
PERF_TYPE_HARDWARE = 0,
PERF_TYPE_SOFTWARE = 1,
PERF_TYPE_TRACEPOINT = 2,
/*
* available TYPE space, raw is the max value.
*/
PERF_TYPE_RAW = 128,
};
/*
* Generalized performance counter event types, used by the hw_event.event_id
* parameter of the sys_perf_counter_open() syscall:
*/
enum hw_event_types {
enum hw_event_ids {
/*
* Common hardware events, generalized by the kernel:
*/
PERF_COUNT_CPU_CYCLES = 0,
PERF_COUNT_INSTRUCTIONS = 1,
PERF_COUNT_CACHE_REFERENCES = 2,
PERF_COUNT_CACHE_MISSES = 3,
PERF_COUNT_BRANCH_INSTRUCTIONS = 4,
PERF_COUNT_BRANCH_MISSES = 5,
PERF_COUNT_BUS_CYCLES = 6,
PERF_COUNT_CPU_CYCLES = 0,
PERF_COUNT_INSTRUCTIONS = 1,
PERF_COUNT_CACHE_REFERENCES = 2,
PERF_COUNT_CACHE_MISSES = 3,
PERF_COUNT_BRANCH_INSTRUCTIONS = 4,
PERF_COUNT_BRANCH_MISSES = 5,
PERF_COUNT_BUS_CYCLES = 6,
PERF_HW_EVENTS_MAX = 7,
PERF_HW_EVENTS_MAX = 7,
};
/*
* Special "software" counters provided by the kernel, even if
* the hardware does not support performance counters. These
* counters measure various physical and sw events of the
* kernel (and allow the profiling of them as well):
*/
PERF_COUNT_CPU_CLOCK = -1,
PERF_COUNT_TASK_CLOCK = -2,
PERF_COUNT_PAGE_FAULTS = -3,
PERF_COUNT_CONTEXT_SWITCHES = -4,
PERF_COUNT_CPU_MIGRATIONS = -5,
PERF_COUNT_PAGE_FAULTS_MIN = -6,
PERF_COUNT_PAGE_FAULTS_MAJ = -7,
/*
* Special "software" counters provided by the kernel, even if the hardware
* does not support performance counters. These counters measure various
* physical and sw events of the kernel (and allow the profiling of them as
* well):
*/
enum sw_event_ids {
PERF_COUNT_CPU_CLOCK = 0,
PERF_COUNT_TASK_CLOCK = 1,
PERF_COUNT_PAGE_FAULTS = 2,
PERF_COUNT_CONTEXT_SWITCHES = 3,
PERF_COUNT_CPU_MIGRATIONS = 4,
PERF_COUNT_PAGE_FAULTS_MIN = 5,
PERF_COUNT_PAGE_FAULTS_MAJ = 6,
PERF_SW_EVENTS_MIN = -8,
PERF_TP_EVENTS_MIN = -65536
PERF_SW_EVENTS_MAX = 7,
};
/*
* IRQ-notification data record type:
*/
enum perf_counter_record_type {
PERF_RECORD_SIMPLE = 0,
PERF_RECORD_IRQ = 1,
PERF_RECORD_GROUP = 2,
PERF_RECORD_SIMPLE = 0,
PERF_RECORD_IRQ = 1,
PERF_RECORD_GROUP = 2,
};
/*
* Hardware event to monitor via a performance monitoring counter:
*/
struct perf_counter_hw_event {
__s64 type;
union {
struct {
__u64 event_id : 56,
type : 8;
};
struct {
__u64 raw_event_id : 63,
raw_type : 1;
};
__u64 event_config;
};
__u64 irq_period;
__u64 record_type;
@ -78,7 +103,6 @@ struct perf_counter_hw_event {
__u64 disabled : 1, /* off by default */
nmi : 1, /* NMI sampling */
raw : 1, /* raw event type */
inherit : 1, /* children inherit it */
pinned : 1, /* must always be on PMU */
exclusive : 1, /* only group on PMU */
@ -87,7 +111,7 @@ struct perf_counter_hw_event {
exclude_hv : 1, /* ditto hypervisor */
exclude_idle : 1, /* don't count when idle */
__reserved_1 : 54;
__reserved_1 : 55;
__u32 extra_config_len;
__u32 __reserved_4;
@ -298,10 +322,11 @@ extern int hw_perf_group_sched_in(struct perf_counter *group_leader,
*/
static inline int is_software_counter(struct perf_counter *counter)
{
return !counter->hw_event.raw && counter->hw_event.type < 0;
return !counter->hw_event.raw_type &&
counter->hw_event.type != PERF_TYPE_HARDWARE;
}
extern void perf_swcounter_event(enum hw_event_types, u64, int, struct pt_regs *);
extern void perf_swcounter_event(u32, u64, int, struct pt_regs *);
#else
static inline void
@ -320,7 +345,7 @@ static inline u64 hw_perf_save_disable(void) { return 0; }
static inline int perf_counter_task_disable(void) { return -EINVAL; }
static inline int perf_counter_task_enable(void) { return -EINVAL; }
static inline void perf_swcounter_event(enum hw_event_types event, u64 nr,
static inline void perf_swcounter_event(u32 event, u64 nr,
int nmi, struct pt_regs *regs) { }
#endif