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trace: Conditionally trace events based on their per-vCPU state

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Events with the 'vcpu' property are conditionally emitted according to
their per-vCPU state. Other events are emitted normally based on their
global tracing state.

Note that the per-vCPU condition check applies to all tracing backends.

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Lluís Vilanova 2016-07-11 12:53:46 +02:00 • committed by Stefan Hajnoczi
parent 4815185902
commit 40b9cd25f7
6 changed files with 57 additions and 29 deletions
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4
scripts/tracetool/backend/ust.py
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@ -6,7 +6,7 @@ LTTng User Space Tracing backend.
"""
__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
__copyright__ = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
__copyright__ = "Copyright 2012-2016, Lluís Vilanova <vilanova@ac.upc.edu>"
__license__ = "GPL version 2 or (at your option) any later version"
__maintainer__ = "Stefan Hajnoczi"
@ -30,6 +30,6 @@ def generate_h(event):
if len(event.args) > 0:
argnames = ", " + argnames
out(' tracepoint(qemu, %(name)s%(tp_args)s);',
out(' tracepoint(qemu, %(name)s%(tp_args)s);',
name=event.name,
tp_args=argnames)