From: "Van Haaren, Harry" <harry.van.haaren@intel.com>
To: Thomas Monjalon <thomas.monjalon@6wind.com>
Cc: "'David Harton (dharton)'" <dharton@cisco.com>,
"dev@dpdk.org" <dev@dpdk.org>,
"Tahhan, Maryam" <maryam.tahhan@intel.com>,
"olivier.matz@6wind.com" <olivier.matz@6wind.com>
Subject: Re: [dpdk-dev] [PATCH] doc: announce xstats api change for 16.07
Date: Wed, 6 Apr 2016 11:16:43 +0000 [thread overview]
Message-ID: <E923DB57A917B54B9182A2E928D00FA6128A42F7@IRSMSX102.ger.corp.intel.com> (raw)
In-Reply-To: <27546869.TpcjJvEkXE@xps13>
> From: Thomas Monjalon [mailto:thomas.monjalon@6wind.com]
> Subject: Re: [dpdk-dev] [PATCH] doc: announce xstats api change for 16.07
> > The issue we are going to fix is that currently PMDs copy strings when retrieving
> statistics, which causes unnecessary overhead. The implementation is not decided yet, but
> using an int->value mapping seems logical.
> I am not sure performance is so much critical when retrieving statistics.
In the previous discussion David was concerned about performance impact
of string copies, are those concerns still present David?
> The extended stats can be infinitely extended. So a string identifier seems
> a lot more natural.
I'm not suggesting that the string identifier is removed totally.
> I do not agree to add a new numeric identifier in the API each time a driver
> wants to report a specific statistic for debugging purpose.
And I agree - the ints are just an index to xstats arrays, no eth-dev wide enums here.
The proposal is to make the API more flexible, see example:
http://thread.gmane.org/gmane.comp.networking.dpdk.devel/31728/focus=32795
This more flexible API would allow other types of information about
statistics be retrieved too.
For now, the sent patch announces that the API/ABI may change, and we can
discuss details of API as development starts.
next prev parent reply other threads:[~2016-04-06 11:16 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-05 17:58 Harry van Haaren
2016-04-05 18:45 ` Thomas Monjalon
2016-04-06 9:02 ` Van Haaren, Harry
2016-04-06 9:22 ` Thomas Monjalon
2016-04-06 11:16 ` Van Haaren, Harry [this message]
2016-04-06 12:14 ` Thomas Monjalon
2016-04-06 13:49 ` David Harton (dharton)
2016-04-06 13:53 ` Van Haaren, Harry
2016-04-06 13:46 ` Remy Horton
2016-04-06 14:00 ` David Harton (dharton)
2016-04-06 14:25 ` Tahhan, Maryam
2016-04-07 21:36 ` Thomas Monjalon
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