rte_event_dev_xstats_reset id type

[Van Haaren, Harry]

> -----Original Message-----
> From: Jerin Jacob <jerinjacobk at gmail.com>
> Sent: Wednesday, October 12, 2022 10:45 AM
> To: Morten Brørup <mb at smartsharesystems.com>; Van Haaren, Harry
> <harry.van.haaren at intel.com>
> Cc: Jerin Jacob <jerinj at marvell.com>; dev at dpdk.org; Li, WeiyuanX
> <weiyuanx.li at intel.com>; Thomas Monjalon <thomas at monjalon.net>; Ferruh Yigit
> <ferruh.yigit at amd.com>; Andrew Rybchenko <andrew.rybchenko at oktetlabs.ru>
> Subject: Re: rte_event_dev_xstats_reset id type
> 
> On Wed, Oct 12, 2022 at 1:40 PM Morten Brørup <mb at smartsharesystems.com>
> wrote:
> >
> > Hi Jerin (eventdev maintainer),
>
> + harry.van.haaren at intel.com as the changes in drivers/event/sw.

Thanks Jerin.


> > While looking into bug #1101 [1], I noticed a mix of unsigned int and uint32_t in
> the test code, which will fail on 64-bit big endian CPUs.

Aha; that we can fix. I am curious why this isn't found in CI/reported before.


> > Specifically, rte_event_dev_xstats_reset() is called with the "ids" parameter
> pointing to an unsigned int [2], but that parameter is a pointer to an uint32_t.
> >
> > I think the type of the ids array parameter to rte_event_dev_xstats_reset() should
> be changed to unsigned int array, like in the other rte_event_dev_xxx() functions.

In this case, we have the option to change the type of a variable in a test-case, or change API and cause API/ABI breakage.
Lets change the unit test code from "unsigned int" to uint32_t, and that will fix the issue?

From a quick review in the test code, there are 3x occurrences of "unsigned int id" being used.
I will send a patch to change them later today.


> > Or even better, use the same type for an "xstats id" across all device types. For
> ethdev devices, they are uint64_t, but I don't know why. (They are passed around as
> arrays, so they could be 32 bit. I guess that they were originally not used in arrays, so
> unsigned int seemed the logical choice.)
> >
> >
> > [1]: https://bugs.dpdk.org/show_bug.cgi?id=1101
> > [2]: https://git.dpdk.org/dpdk/tree/drivers/event/sw/sw_evdev_selftest.c#n1766
> >
> >
> > Med venlig hilsen / Kind regards,
> > -Morten Brørup