On 10 July 2013 19:03, Ben Pfaff <b...@nicira.com> wrote: > The backtrace feature of timeval is useful because it provides a "poor > man's profile" view of Open vSwitch. But it is not likely to be useful in > a multithreaded process, because signal delivery doesn't necessarily follow > the profile when there is more than one thread. (A signal in a > multithreaded process are delivered to an arbitrary thread.) > > Another problem with the backtrace feature is that it is difficult for > format_backtraces() to synchronize properly with the signal handler in a > multithreaded process. In a single-threaded process, it can just block > the signal handler, but in a multithreaded process this does not prevent > signal delivery to threads other than the one running format_backtrace(). > > Signed-off-by: Ben Pfaff <b...@nicira.com>
Acked-by: Ed Maste <ema...@freebsd.org> X-CudaMail-Whitelist-To: dev@openvswitch.org _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
