[dpdk-dev] [PATCH v3 7/8] ethdev: support of multiple sizes of redirection table

[Zhang, Helin]

> -----Original Message-----
> From: Thomas Monjalon [mailto:thomas.monjalon at 6wind.com]
> Sent: Tuesday, October 28, 2014 6:05 PM
> To: Zhang, Helin
> Cc: dev at dpdk.org
> Subject: Re: [dpdk-dev] [PATCH v3 7/8] ethdev: support of multiple sizes of
> redirection table
> 
> 2014-10-28 00:37, Zhang, Helin:
> > From: Thomas Monjalon [mailto:thomas.monjalon at 6wind.com]
> > > 2014-10-22 19:53, Helin Zhang:
> > > > +#define RTE_BIT_WIDTH_64 (CHAR_BIT * sizeof(uint64_t))
> > >
> > > How can it be different of 64?
> > > Using 64 would be simpler to understand than RTE_BIT_WIDTH_64.
> > >
> > > > +	uint8_t reta[RTE_BIT_WIDTH_64]; /**< 64 redirection table entries. */
> > We always try to use macro in code to replace numeric, this can get the numeric
> more understandable.
> 
> How bit width 64 is more understandable than 64?
> Especially when you count a number of entries, not a bit width.
> RETA_ENTRIES_MAX would be more understandable.
Renaming the macro is needed. I plan to rename it to RTE_RETA_GROUP_SIZE,
as it is a group of 64 reta entries, but not the maximum number of valid entries.

> 
> --
> Thomas

Regards,
Helin