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[Qemu-devel] [PULL 1/1] trace: Immediately apply per-vCPU state changes
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PULL 1/1] trace: Immediately apply per-vCPU state changes if a vCPU is being created |
Date: |
Fri, 15 Sep 2017 18:39:50 +0100 |
From: Lluís Vilanova <address@hidden>
Right now, function trace_event_set_vcpu_state_dynamic() asynchronously enables
events in the case a vCPU is executing TCG code. If the vCPU is being created
this makes some events like "guest_cpu_enter" to not be traced.
Signed-off-by: Lluís Vilanova <address@hidden>
Reviewed-by: Emilio G. Cota <address@hidden>
Message-id: address@hidden
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
trace/control-target.c | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/trace/control-target.c b/trace/control-target.c
index 4e36101997..706b2cee9d 100644
--- a/trace/control-target.c
+++ b/trace/control-target.c
@@ -88,13 +88,17 @@ void trace_event_set_vcpu_state_dynamic(CPUState *vcpu,
clear_bit(vcpu_id, vcpu->trace_dstate_delayed);
(*ev->dstate)--;
}
- /*
- * Delay changes until next TB; we want all TBs to be built from a
- * single set of dstate values to ensure consistency of generated
- * tracing code.
- */
- async_run_on_cpu(vcpu, trace_event_synchronize_vcpu_state_dynamic,
- RUN_ON_CPU_NULL);
+ if (vcpu->created) {
+ /*
+ * Delay changes until next TB; we want all TBs to be built from a
+ * single set of dstate values to ensure consistency of generated
+ * tracing code.
+ */
+ async_run_on_cpu(vcpu, trace_event_synchronize_vcpu_state_dynamic,
+ RUN_ON_CPU_NULL);
+ } else {
+ trace_event_synchronize_vcpu_state_dynamic(vcpu, RUN_ON_CPU_NULL);
+ }
}
}
--
2.13.5