> -----Original Message-----
> From: Jerin Jacob [mailto:jerin.ja...@caviumnetworks.com]
> Sent: Sunday, February 19, 2017 12:32 PM
> To: Van Haaren, Harry <harry.van.haa...@intel.com>
> Cc: dev@dpdk.org; Richardson, Bruce <bruce.richard...@intel.com>
> Subject: Re: [PATCH v3 04/17] eventdev: add APIs for extended stats
<snip>
> > +/**
> > + * Reset the values of the xstats on the whole device.
> > + *
> > + * @param dev_id
> > + * The identifier of the device
> > + * @return
> > + * - zero: successfully reset the statistics to zero
> > + * - negative value: -EINVAL invalid dev_id, -ENOTSUP if not supported.
> > + */
> > +int
> > +rte_event_dev_xstats_reset(uint8_t dev_id);
>
> I think it would be useful to selectively reset the specific counter if
> needed.
Ok - I like the simplicity of a single reset() covering the whole eventdev, so
that the stats should be consistent. No objection to changing the API, as
applications can do a full reset using the "partial" reset API if they require.
> something like below(Just to share my thought in C code)
>
> int
> rte_event_dev_xstats_reset(uint8_t dev_id,
> enum rte_event_dev_xstats_mode mode/* INT_MAX to specify all xstats on
> the whole device */
> const unsigned int ids /* UINT_MAX to specify all the ids on the
> specific mode */
The other functions that take a mode require a "queue_port_id" to select the
component (port number or queue id number). I'll add the parameter.
Also I don't like the INT_MAX solution, as the enum type doesn't have to be
INT, it can be char or uintX_t - compiler and CFLAGS can be used to change the
enum type IIRC.
The ids parameter is an array in the xstats_get() functions, allowing multiple
ids to be retrieved in one call. This also allows a NULL parameter to indicate
all. I think this suits better than a single int id, and UINT_MAX for all.
TL;DR: I'm suggesting
int
rte_event_dev_xstats_reset(uint8_t dev_id,
enum rte_event_dev_xstats_mode mode, /* device, port or queue */
int16_t queue_port_id, /* Queue or Port to reset. -1
resets all of *mode* ports or queues. */
const uint32_t ids[]); /* NULL array indicates to reset
all stats */
Thoughts?
> Other than above comments, Its looks very good.
Thanks for review!
