path: root/include/trace/define_trace.h
diff options
authorLai Jiangshan <laijs@cn.fujitsu.com>2010-06-03 18:26:24 +0800
committerSteven Rostedt <rostedt@goodmis.org>2010-07-20 22:05:34 -0400
commitbc289ae98b75d93228d24f521ef02a076e506e94 (patch)
tree50d151d0fbde1b106932c0f80a2639839d261ca3 /include/trace/define_trace.h
parent985023dee6e212493831431ba2e3ce8918f001b2 (diff)
tracing: Reduce latency and remove percpu trace_seq
__print_flags() and __print_symbolic() use percpu trace_seq: 1) Its memory is allocated at compile time, it wastes memory if we don't use tracing. 2) It is percpu data and it wastes more memory for multi-cpus system. 3) It disables preemption when it executes its core routine "trace_seq_printf(s, "%s: ", #call);" and introduces latency. So we move this trace_seq to struct trace_iterator. Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> LKML-Reference: <4C078350.7090106@cn.fujitsu.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'include/trace/define_trace.h')
0 files changed, 0 insertions, 0 deletions

Privacy Policy