9397740244
Instead of having a global dstate array, declare a single
'uint16 TRACE_${EVENT_NAME}_DSTATE' variable for each
trace event. Record a pointer to this variable in the
TraceEvent struct too.
By turning trace_event_get_state_dynamic_by_id into a
macro, this still hits the fast path, and cache affinity
is ensured by declaring all the uint16 vars adjacent to
each other.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 1475588159-30598-7-git-send-email-berrange@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
/*
|
|
* Interface for configuring and controlling the state of tracing events.
|
|
*
|
|
* Copyright (C) 2011-2016 Lluís Vilanova <vilanova@ac.upc.edu>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*/
|
|
|
|
#ifndef TRACE__CONTROL_INTERNAL_H
|
|
#define TRACE__CONTROL_INTERNAL_H
|
|
|
|
#include <stddef.h> /* size_t */
|
|
|
|
#include "qom/cpu.h"
|
|
|
|
|
|
extern TraceEvent trace_events[];
|
|
extern int trace_events_enabled_count;
|
|
|
|
|
|
static inline bool trace_event_is_pattern(const char *str)
|
|
{
|
|
assert(str != NULL);
|
|
return strchr(str, '*') != NULL;
|
|
}
|
|
|
|
static inline TraceEventID trace_event_get_id(TraceEvent *ev)
|
|
{
|
|
assert(ev != NULL);
|
|
return ev->id;
|
|
}
|
|
|
|
static inline TraceEventVCPUID trace_event_get_vcpu_id(TraceEvent *ev)
|
|
{
|
|
return ev->vcpu_id;
|
|
}
|
|
|
|
static inline bool trace_event_is_vcpu(TraceEvent *ev)
|
|
{
|
|
return ev->vcpu_id != TRACE_VCPU_EVENT_COUNT;
|
|
}
|
|
|
|
static inline const char * trace_event_get_name(TraceEvent *ev)
|
|
{
|
|
assert(ev != NULL);
|
|
return ev->name;
|
|
}
|
|
|
|
static inline bool trace_event_get_state_static(TraceEvent *ev)
|
|
{
|
|
assert(ev != NULL);
|
|
return ev->sstate;
|
|
}
|
|
|
|
/* it's on fast path, avoid consistency checks (asserts) */
|
|
#define trace_event_get_state_dynamic_by_id(id) \
|
|
(unlikely(trace_events_enabled_count) && _ ## id ## _DSTATE)
|
|
|
|
static inline bool trace_event_get_state_dynamic(TraceEvent *ev)
|
|
{
|
|
return unlikely(trace_events_enabled_count) && *ev->dstate;
|
|
}
|
|
|
|
static inline bool trace_event_get_vcpu_state_dynamic_by_vcpu_id(CPUState *vcpu,
|
|
TraceEventVCPUID id)
|
|
{
|
|
/* it's on fast path, avoid consistency checks (asserts) */
|
|
if (unlikely(trace_events_enabled_count)) {
|
|
return test_bit(id, vcpu->trace_dstate);
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static inline bool trace_event_get_vcpu_state_dynamic(CPUState *vcpu,
|
|
TraceEvent *ev)
|
|
{
|
|
TraceEventVCPUID id;
|
|
assert(trace_event_is_vcpu(ev));
|
|
id = trace_event_get_vcpu_id(ev);
|
|
return trace_event_get_vcpu_state_dynamic_by_vcpu_id(vcpu, id);
|
|
}
|
|
|
|
#endif /* TRACE__CONTROL_INTERNAL_H */
|