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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2010-05-19 14:02:22 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-05-21 11:37:56 +0200 |
| commit | 1c024eca51fdc965290acf342ae16a476c2189d0 (patch) | |
| tree | 28dc160cc70a20eeb8b8825d6d52ea88a6188413 /include/trace/ftrace.h | |
| parent | b7e2ecef92d2e7785e6d76b41e5ba8bcbc45259d (diff) | |
| download | linux-1c024eca51fdc965290acf342ae16a476c2189d0.tar.bz2 | |
perf, trace: Optimize tracepoints by using per-tracepoint-per-cpu hlist to track events
Avoid the swevent hash-table by using per-tracepoint
hlists.
Also, avoid conditionals on the fast path by ordering
with probe unregister so that we should never get on
the callback path without the data being there.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <20100521090710.473188012@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/trace/ftrace.h')
| -rw-r--r-- | include/trace/ftrace.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h index f282885057dd..4eb2148f1321 100644 --- a/include/trace/ftrace.h +++ b/include/trace/ftrace.h @@ -768,6 +768,7 @@ perf_trace_templ_##call(struct ftrace_event_call *event_call, \ struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ struct ftrace_raw_##call *entry; \ u64 __addr = 0, __count = 1; \ + struct hlist_head *head; \ int __entry_size; \ int __data_size; \ int rctx; \ @@ -790,8 +791,9 @@ perf_trace_templ_##call(struct ftrace_event_call *event_call, \ \ { assign; } \ \ + head = per_cpu_ptr(event_call->perf_events, smp_processor_id());\ perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \ - __count, __regs, event_call->perf_data); \ + __count, __regs, head); \ } #undef DEFINE_EVENT |