3 Commits

Author	SHA1	Message	Date
Lluís Vilanova	40b9cd25f7	trace: Conditionally trace events based on their per-vCPU state ... 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>	2016-07-18 18:23:12 +01:00
Lluís Vilanova	1dad2ce973	trace: [tracetool] Minimize the amount of per-backend code ... Backends now only contain the essential backend-specific code, and most of the work is moved to frontend code. Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>	2014-05-07 19:07:18 +02:00
Eiichi Tsukata	781e9545db	trace: Add ftrace tracing backend ... This patch adds a ftrace tracing backend which sends trace event to ftrace marker file. You can effectively compare qemu trace data and kernel(especially, kvm.ko when using KVM) trace data. The ftrace backend is restricted to Linux only. To try out the ftrace backend: $ ./configure --trace-backend=ftrace $ make if you use KVM, enable kvm events in ftrace: # sudo echo 1 > /sys/kernel/debug/tracing/events/kvm/enable After running qemu by root user, you can get the trace: # cat /sys/kernel/debug/tracing/trace Signed-off-by: Eiichi Tsukata <eiichi.tsukata.xh@hitachi.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>	2013-05-03 13:58:09 +02:00