From: Olivier Matz <olivier.matz@6wind.com>
To: Bruce Richardson <bruce.richardson@intel.com>
Cc: dev@dpdk.org, jerin.jacob@caviumnetworks.com
Subject: Re: [PATCH v2 1/5] ring: allow rings with non power-of-2 sizes
Date: Mon, 3 Jul 2017 10:46:42 +0200 [thread overview]
Message-ID: <20170703104642.63460d89@platinum> (raw)
In-Reply-To: <20170630150621.156365-2-bruce.richardson@intel.com>
On Fri, 30 Jun 2017 16:06:17 +0100, Bruce Richardson <bruce.richardson@intel.com> wrote:
> The rte_rings traditionally have only supported having ring sizes as powers
> of 2, with the actual usable space being the size - 1. In some cases, for
> example, with an eventdev where we want to precisely control queue depths
> for latency, we need to allow ring sizes which are not powers of two so we
> add in an additional ring capacity value to allow that. For existing rings,
> this value will be size-1, i.e. the same as the mask, but if the new
> EXACT_SZ flag is passed on ring creation, the ring will have exactly the
> usable space requested, although the underlying memory size may be bigger.
>
> Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>
next prev parent reply other threads:[~2017-07-03 8:46 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-07 13:36 [PATCH 0/5] create event rings type Bruce Richardson
2017-06-07 13:36 ` [PATCH 1/5] ring: allow rings with non power-of-2 sizes Bruce Richardson
2017-06-30 9:40 ` Olivier Matz
2017-06-30 11:32 ` Bruce Richardson
2017-06-30 12:24 ` Olivier Matz
2017-06-30 13:59 ` Bruce Richardson
2017-06-07 13:36 ` [PATCH 2/5] test/test: add unit tests for exact size rings Bruce Richardson
2017-06-30 9:42 ` Olivier Matz
2017-06-07 13:36 ` [PATCH 3/5] eventdev: add ring structure for events Bruce Richardson
2017-06-12 5:15 ` Jerin Jacob
2017-06-12 8:53 ` Bruce Richardson
2017-06-30 13:24 ` Bruce Richardson
2017-06-07 13:36 ` [PATCH 4/5] test/test: add auto-tests for event ring functions Bruce Richardson
2017-06-07 13:36 ` [PATCH 5/5] event/sw: change worker rings to standard event rings Bruce Richardson
2017-06-30 15:06 ` [PATCH v2 0/5] create event rings type Bruce Richardson
2017-06-30 15:06 ` [PATCH v2 1/5] ring: allow rings with non power-of-2 sizes Bruce Richardson
2017-07-03 8:46 ` Olivier Matz [this message]
2017-06-30 15:06 ` [PATCH v2 2/5] test/test: add unit tests for exact size rings Bruce Richardson
2017-07-03 8:47 ` Olivier Matz
2017-06-30 15:06 ` [PATCH v2 3/5] eventdev: add ring structure for events Bruce Richardson
2017-07-03 9:52 ` Van Haaren, Harry
2017-06-30 15:06 ` [PATCH v2 4/5] test/test: add auto-tests for event ring functions Bruce Richardson
2017-07-03 12:30 ` Van Haaren, Harry
2017-06-30 15:06 ` [PATCH v2 5/5] event/sw: change worker rings to standard event rings Bruce Richardson
2017-07-03 12:28 ` Van Haaren, Harry
2017-07-03 12:44 ` Jerin Jacob
2017-07-03 13:01 ` Van Haaren, Harry
2017-07-04 5:36 ` Jerin Jacob
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