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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2010-05-18 18:08:32 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-05-18 18:35:46 +0200 |
| commit | 4f41c013f553957765902fb01475972f0af3e8e7 (patch) | |
| tree | ddaa54947cc990094a4b270f2f8b3d6da195044f /kernel/trace/trace_syscalls.c | |
| parent | ef4f30f54e265c2f6f9ac9eda4db158a4e16050b (diff) | |
| download | linux-4f41c013f553957765902fb01475972f0af3e8e7.tar.gz linux-4f41c013f553957765902fb01475972f0af3e8e7.tar.bz2 linux-4f41c013f553957765902fb01475972f0af3e8e7.zip | |
perf/ftrace: Optimize perf/tracepoint interaction for single events
When we've got but a single event per tracepoint
there is no reason to try and multiplex it so don't.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Tested-by: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/trace_syscalls.c')
| -rw-r--r-- | kernel/trace/trace_syscalls.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c index 4d6d711717f2..9eff1a4b49b9 100644 --- a/kernel/trace/trace_syscalls.c +++ b/kernel/trace/trace_syscalls.c @@ -468,7 +468,8 @@ static void perf_syscall_enter(struct pt_regs *regs, long id) rec->nr = syscall_nr; syscall_get_arguments(current, regs, 0, sys_data->nb_args, (unsigned long *)&rec->args); - perf_trace_buf_submit(rec, size, rctx, 0, 1, flags, regs); + perf_trace_buf_submit(rec, size, rctx, 0, 1, flags, regs, + sys_data->enter_event->perf_data); } int perf_sysenter_enable(struct ftrace_event_call *call) @@ -543,7 +544,8 @@ static void perf_syscall_exit(struct pt_regs *regs, long ret) rec->nr = syscall_nr; rec->ret = syscall_get_return_value(current, regs); - perf_trace_buf_submit(rec, size, rctx, 0, 1, flags, regs); + perf_trace_buf_submit(rec, size, rctx, 0, 1, flags, regs, + sys_data->exit_event->perf_data); } int perf_sysexit_enable(struct ftrace_event_call *call) |