diff options
| author | Daniel P. Berrange <berrange@redhat.com> | 2016-10-04 14:35:45 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2016-10-12 09:35:54 +0200 |
| commit | 93977402441405055500ff0389b49f6bbac9d50b (patch) | |
| tree | 3a1e1ded1e54db71d2576460552faae5d0f32136 /scripts | |
| parent | 599ab2f241ee6693ea0a2700210718327b346f7f (diff) | |
trace: remove global 'uint16 dstate[]' array
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>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/tracetool/__init__.py | 3 | ||||
| -rw-r--r-- | scripts/tracetool/format/events_c.py | 9 | ||||
| -rw-r--r-- | scripts/tracetool/format/events_h.py | 3 |
3 files changed, 12 insertions, 3 deletions
diff --git a/scripts/tracetool/__init__.py b/scripts/tracetool/__init__.py index be24039c5e..a11f36b5d4 100644 --- a/scripts/tracetool/__init__.py +++ b/scripts/tracetool/__init__.py @@ -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.""" diff --git a/scripts/tracetool/format/events_c.py b/scripts/tracetool/format/events_c.py index 4012063283..ef873fa137 100644 --- a/scripts/tracetool/format/events_c.py +++ b/scripts/tracetool/format/events_c.py @@ -25,6 +25,9 @@ def generate(events, backend): '#include "trace/control.h"', '') + for e in events: + out('uint16_t %s;' % e.api(e.QEMU_DSTATE)) + out('TraceEvent trace_events[TRACE_EVENT_COUNT] = {') for e in events: @@ -34,11 +37,13 @@ def generate(events, backend): vcpu_id = "TRACE_VCPU_EVENT_COUNT" out(' { .id = %(id)s, .vcpu_id = %(vcpu_id)s,' ' .name = \"%(name)s\",' - ' .sstate = %(sstate)s },', + ' .sstate = %(sstate)s,', + ' .dstate = &%(dstate)s, }, ', id = "TRACE_" + e.name.upper(), vcpu_id = vcpu_id, name = e.name, - sstate = "TRACE_%s_ENABLED" % e.name.upper()) + sstate = "TRACE_%s_ENABLED" % e.name.upper(), + dstate = e.api(e.QEMU_DSTATE)) out('};', '') diff --git a/scripts/tracetool/format/events_h.py b/scripts/tracetool/format/events_h.py index a9da60b7fa..03417de0ec 100644 --- a/scripts/tracetool/format/events_h.py +++ b/scripts/tracetool/format/events_h.py @@ -32,6 +32,9 @@ def generate(events, backend): out(' TRACE_EVENT_COUNT', '} TraceEventID;') + for e in events: + out('extern uint16_t %s;' % e.api(e.QEMU_DSTATE)) + # per-vCPU event identifiers out('typedef enum {') |