From: Steven Rostedt <rostedt@xxxxxxxxxxx> Date: Tue, 13 Apr 2010 17:52:21 -0400 > On Tue, 2010-04-13 at 14:34 -0700, David Miller wrote: >> BTW, one thing that drives me nuts on this machine is that catting the >> 'trace' file takes several seconds to start up. Is it calling >> stop_machine() or something else which very expensive with high cpu >> counts? > > No, in does not call stop_machine, but it stops all tracing on all cpus. > I wonder what is happening :-/ > > It does allocate an "iterator" that has per cpu descriptors. > > Does "trace_pipe" give you the same issues? Ok, I'll try to track down the cause, thanks Steven. 'perf' works fine in this configuration so maybe that will provide some clues. -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
