Paolo Bonzini <pbonz...@redhat.com> writes: > On 11/04/2017 18:50, Alex Bennée wrote: >> This can be pre-processed later from the trace file. > > What about skipping this patch, and instead adding five trace points > > trace_tlb_flush_self(int vcpu) > trace_tlb_flush_async_schedule(int from, int to) > trace_tlb_flush_async_work(int vcpu) > trace_tlb_flush_synced_schedule(int vcpu) > trace_tlb_flush_synced_work(int vcpu) > > The disadvantage is that the TLB flush counts are not emitted in "info > tcg", but the resulting information is finer-grained and the offline > accumulation of tracepoints can provide the same information.
In principle I agree. It depends if people find the console based TCG information useful or not. I could macro-up something that would use counters when tracing is not enabled and prompt users to use the tracing interface in the console when it is. > > Paolo > >> Signed-off-by: Alex Bennée <alex.ben...@linaro.org> >> --- >> cpus.c | 6 ++++++ >> trace-events | 3 +++ >> 2 files changed, 9 insertions(+) >> >> diff --git a/cpus.c b/cpus.c >> index 740b8dc3f8..fae7344df5 100644 >> --- a/cpus.c >> +++ b/cpus.c >> @@ -50,6 +50,8 @@ >> #include "qapi-event.h" >> #include "hw/nmi.h" >> #include "sysemu/replay.h" >> +#include "exec/cputlb.h" >> +#include "trace-root.h" >> >> #ifdef CONFIG_LINUX >> >> @@ -1252,6 +1254,10 @@ static int tcg_cpu_exec(CPUState *cpu) >> int64_t ti; >> #endif >> >> + trace_tlb_flush_stats(tlb_self_flush_count, >> + tlb_async_flush_count, >> + tlb_synced_flush_count); >> + >> #ifdef CONFIG_PROFILER >> ti = profile_getclock(); >> #endif >> diff --git a/trace-events b/trace-events >> index b07a09ba95..fc23e15d25 100644 >> --- a/trace-events >> +++ b/trace-events >> @@ -94,6 +94,9 @@ disable exec_tb(void *tb, uintptr_t pc) "tb:%p >> pc=0x%"PRIxPTR >> disable exec_tb_nocache(void *tb, uintptr_t pc) "tb:%p pc=0x%"PRIxPTR >> disable exec_tb_exit(void *last_tb, unsigned int flags) "tb:%p flags=%x" >> >> +# cpus.c >> +tlb_flush_stats(int self, int async, int synced) "self:%d async:%d >> synced:%d" >> + >> # translate-all.c >> translate_block(void *tb, uintptr_t pc, uint8_t *tb_code) "tb:%p, >> pc:0x%"PRIxPTR", tb_code:%p" >> >> -- Alex Bennée
