> Are you talking about a case in which you need to set Handler::NONEXCLUSIVE > for performance reasons?
Yes, I have an element that emulates an MF-TDMA link, and the MF-TDMA schedule can be altered at arbitrary points in time by a user level process. So ideally, I would like to be able to install a new schedule, while continuing to emulate the link. Roman > > BBL > > --- On Fri, 2/11/11, Roman Chertov <[email protected]> wrote: > > > From: Roman Chertov <[email protected]> > > Subject: [Click] Handler Synchronization question > > To: [email protected] > > Date: Friday, February 11, 2011, 10:27 AM > > I have a question regarding > > synchronization between the handlers and the main > > element code. As far as I understand, using > > Handler::NONEXCLUSIVE flag when > > defining a handler allows for the case where the main > > thread executes a task for > > some element, while at the same time the handler for that > > element can get > > called. > > > > However, the following comment for SpinLock got me confused > > as to how ensure > > atomic operations when the element task and the handler > > execute at the same > > time. > > > > * Spinlock operations do nothing unless Click was compiled > > with SMP support > > * (with --enable-multithread). Therefore, Spinlock > > should not be used to, > > * for example, synchronize handlers with main element > > threads. See also > > * SpinlockIRQ. > > > > If Spinlock is not the proper mechanism, what is the proper > > way to do it when > > building an element that must work in user and kernel > > levels? > > > > Thanks, > > > > Roman > > > > > > _______________________________________________ > > click mailing list > > [email protected] > > https://amsterdam.lcs.mit.edu/mailman/listinfo/click > > > > > > _____________________________________________________________________________ > _______ > The fish are biting. > Get more visitors on your site using Yahoo! Search Marketing. > http://searchmarketing.yahoo.com/arp/sponsoredsearch_v2.php _______________________________________________ click mailing list [email protected] https://amsterdam.lcs.mit.edu/mailman/listinfo/click
