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trace: remove global 'uint16 dstate[]' array

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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>
This commit is contained in:
Daniel P. Berrange 2016-10-04 14:35:45 +01:00 • committed by Stefan Hajnoczi
parent 599ab2f241
commit 9397740244
8 changed files with 37 additions and 39 deletions
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3
scripts/tracetool/__init__.py
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@ -265,11 +265,12 @@ class Event(object):
QEMU_TRACE = "trace_%(name)s"
QEMU_TRACE_TCG = QEMU_TRACE + "_tcg"
QEMU_DSTATE = "_TRACE_%(NAME)s_DSTATE"
def api(self, fmt=None):
if fmt is None:
fmt = Event.QEMU_TRACE
return fmt % {"name": self.name}
return fmt % {"name": self.name, "NAME": self.name.upper()}
def transform(self, *trans):
"""Return a new Event with transformed Arguments."""