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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2010-05-19 10:52:27 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-05-21 11:37:56 +0200 |
| commit | b7e2ecef92d2e7785e6d76b41e5ba8bcbc45259d (patch) | |
| tree | 341c3a03743108bbdf82ee0eed9f4c4085f1b694 /kernel/trace/trace_kprobe.c | |
| parent | 1c34bde13a3cdcd4c7c6322f8052e67c2c91caf1 (diff) | |
| download | linux-b7e2ecef92d2e7785e6d76b41e5ba8bcbc45259d.tar.bz2 | |
perf, trace: Optimize tracepoints by removing IRQ-disable from perf/tracepoint interaction
Improves performance.
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
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: <1274259525.5605.10352.camel@twins>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/trace_kprobe.c')
| -rw-r--r-- | kernel/trace/trace_kprobe.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index 2d7bf4146be8..20c96de0aea0 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -1343,7 +1343,6 @@ static __kprobes void kprobe_perf_func(struct kprobe *kp, struct kprobe_trace_entry_head *entry; u8 *data; int size, __size, i; - unsigned long irq_flags; int rctx; __size = sizeof(*entry) + tp->size; @@ -1353,7 +1352,7 @@ static __kprobes void kprobe_perf_func(struct kprobe *kp, "profile buffer not large enough")) return; - entry = perf_trace_buf_prepare(size, call->id, &rctx, &irq_flags); + entry = perf_trace_buf_prepare(size, call->id, regs, &rctx); if (!entry) return; @@ -1362,7 +1361,7 @@ static __kprobes void kprobe_perf_func(struct kprobe *kp, for (i = 0; i < tp->nr_args; i++) call_fetch(&tp->args[i].fetch, regs, data + tp->args[i].offset); - perf_trace_buf_submit(entry, size, rctx, entry->ip, 1, irq_flags, regs, call->perf_data); + perf_trace_buf_submit(entry, size, rctx, entry->ip, 1, regs, call->perf_data); } /* Kretprobe profile handler */ @@ -1374,7 +1373,6 @@ static __kprobes void kretprobe_perf_func(struct kretprobe_instance *ri, struct kretprobe_trace_entry_head *entry; u8 *data; int size, __size, i; - unsigned long irq_flags; int rctx; __size = sizeof(*entry) + tp->size; @@ -1384,7 +1382,7 @@ static __kprobes void kretprobe_perf_func(struct kretprobe_instance *ri, "profile buffer not large enough")) return; - entry = perf_trace_buf_prepare(size, call->id, &rctx, &irq_flags); + entry = perf_trace_buf_prepare(size, call->id, regs, &rctx); if (!entry) return; @@ -1395,7 +1393,7 @@ static __kprobes void kretprobe_perf_func(struct kretprobe_instance *ri, call_fetch(&tp->args[i].fetch, regs, data + tp->args[i].offset); perf_trace_buf_submit(entry, size, rctx, entry->ret_ip, 1, - irq_flags, regs, call->perf_data); + regs, call->perf_data); } static int probe_perf_enable(struct ftrace_event_call *call) |