qemu/trace
Lluís Vilanova 61a67f71dd exec: [tcg] Use different TBs according to the vCPU's dynamic tracing state
Every vCPU now uses a separate set of TBs for each set of dynamic
tracing event state values. Each set of TBs can be used by any number of
vCPUs to maximize TB reuse when vCPUs have the same tracing state.

This feature is later used by tracetool to optimize tracing of guest
code events.

The maximum number of TB sets is defined as 2^E, where E is the number
of events that have the 'vcpu' property (their state is stored in
CPUState->trace_dstate).

For this to work, a change on the dynamic tracing state of a vCPU will
force it to flush its virtual TB cache (which is only indexed by
address), and fall back to the physical TB cache (which now contains the
vCPU's dynamic tracing state as part of the hashing function).

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-id: 149915775266.6295.10060144081246467690.stgit@frigg.lan
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-07-17 13:11:05 +01:00
..
Makefile.objs trace: fix tcg tracing build breakage 2017-03-28 11:07:46 +01:00
control-internal.h trace: provide mechanism for registering trace events 2016-10-12 09:52:50 +02:00
control-target.c exec: [tcg] Use different TBs according to the vCPU's dynamic tracing state 2017-07-17 13:11:05 +01:00
control.c trace: Allocate cpu->trace_dstate in place 2017-07-17 13:10:45 +01:00
control.h exec: [tcg] Use different TBs according to the vCPU's dynamic tracing state 2017-07-17 13:11:05 +01:00
event-internal.h trace: remove the TraceEventID and TraceEventVCPUID enums 2016-10-12 09:35:54 +02:00
ftrace.c trace: switch to modular code generation for sub-directories 2017-01-31 17:11:18 +00:00
ftrace.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
mem-internal.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
mem.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
qmp.c trace: convert code to use event iterators 2016-10-12 09:35:54 +02:00
simple.c trace: switch to modular code generation for sub-directories 2017-01-31 17:11:18 +00:00
simple.h trace: get rid of generated-events.h/generated-events.c 2016-10-12 09:54:52 +02:00