> -----Original Message----- > From: Jerin Jacob [mailto:jerin.jacob at caviumnetworks.com] > Sent: Sunday, October 16, 2016 11:18 PM > To: Eads, Gage <gage.eads at intel.com> > Cc: dev at dpdk.org; thomas.monjalon at 6wind.com; Richardson, Bruce > <bruce.richardson at intel.com>; Vangati, Narender > <narender.vangati at intel.com>; hemant.agrawal at nxp.com > Subject: Re: [dpdk-dev] [RFC] [PATCH v2] libeventdev: event driven > programming model framework for DPDK > > On Fri, Oct 14, 2016 at 03:00:57PM +0000, Eads, Gage wrote: > > Thanks Jerin, this looks good. I've put a few notes/questions inline. > > Thanks Gage. > > > > > > + > > > +/** > > > + * Get the device identifier for the named event device. > > > + * > > > + * @param name > > > + * Event device name to select the event device identifier. > > > + * > > > + * @return > > > + * Returns event device identifier on success. > > > + * - <0: Failure to find named event device. > > > + */ > > > +extern uint8_t > > > +rte_event_dev_get_dev_id(const char *name); > > > > This return type should be int8_t, or some signed type, to support the > failure > case. > > Makes sense. I will change to int to make consistent with > rte_cryptodev_get_dev_id() > > > > > > +}; > > > + > > > +/** > > > + * Schedule one or more events in the event dev. > > > + * > > > + * An event dev implementation may define this is a NOOP, for > > > instance if + * the event dev performs its scheduling in hardware. > > > + * > > > + * @param dev_id > > > + * The identifier of the device. > > > + */ > > > +extern void > > > +rte_event_schedule(uint8_t dev_id); > > > > One idea: Have the function return the number of scheduled packets (or 0 > for > implementations that do scheduling in hardware). This could be a helpful > diagnostic for the software scheduler. > > How about returning an implementation specific value ? > Rather than defining certain function associated with returned value. > Just to make sure it works with all HW/SW implementations. Something like > below, > > /** > * Schedule one or more events in the event dev. > * > * An event dev implementation may define this is a NOOP, for instance if > * the event dev performs its scheduling in hardware. > * > * @param dev_id > * The identifier of the device. > * @return > * Implementation specific value from the event driver for diagnostic > purpose > */ > extern int > rte_event_schedule(uint8_t dev_id); > >
That's fine by me. I also had a comment on the return value of rte_event_dev_info_get() in my previous email: "I'm wondering if this return type should be int, so we can return an error if the dev_id is invalid." What do you think? Thanks, Gage > >
