From: "Carrillo, Erik G" <erik.g.carrillo@intel.com>
To: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>,
"jerin.jacob@caviumnetworks.com" <jerin.jacob@caviumnetworks.com>
Cc: "mattias.ronnblom@ericsson.com" <mattias.ronnblom@ericsson.com>,
"pbhagavatula@caviumnetworks.com"
<pbhagavatula@caviumnetworks.com>, "dev@dpdk.org" <dev@dpdk.org>,
nd <nd@arm.com>, nd <nd@arm.com>
Subject: Re: [dpdk-dev] [PATCH v6 1/1] eventdev: add new software event timer adapter
Date: Fri, 26 Apr 2019 18:58:30 +0000 [thread overview]
Message-ID: <BE54F058557D9A4FAC1D84E2FC6D8757234000A3@fmsmsx115.amr.corp.intel.com> (raw)
Message-ID: <20190426185830.SxriU1oOmb5DEkQrnyRx-czJONDJIrMRBzVYhP2boI0@z> (raw)
In-Reply-To: <VE1PR08MB51495D20618A43EEB0F881E8983E0@VE1PR08MB5149.eurprd08.prod.outlook.com>
> -----Original Message-----
> From: Honnappa Nagarahalli [mailto:Honnappa.Nagarahalli@arm.com]
> Sent: Friday, April 26, 2019 1:51 PM
> To: Carrillo, Erik G <erik.g.carrillo@intel.com>;
> jerin.jacob@caviumnetworks.com
> Cc: mattias.ronnblom@ericsson.com; pbhagavatula@caviumnetworks.com;
> dev@dpdk.org; Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>;
> nd <nd@arm.com>; nd <nd@arm.com>
> Subject: RE: [dpdk-dev] [PATCH v6 1/1] eventdev: add new software event
> timer adapter
>
> Hi Erik,
> A quick question.
>
> > -----Original Message-----
> > From: dev <dev-bounces@dpdk.org> On Behalf Of Erik Gabriel Carrillo
> > Sent: Friday, April 26, 2019 10:14 AM
> > To: jerin.jacob@caviumnetworks.com
> > Cc: mattias.ronnblom@ericsson.com;
> pbhagavatula@caviumnetworks.com;
> > dev@dpdk.org
> > Subject: [dpdk-dev] [PATCH v6 1/1] eventdev: add new software event
> > timer adapter
> >
> > This patch introduces a new version of the event timer adapter software
> PMD.
> > In the original design, timer event producer lcores in the primary and
> > secondary processes enqueued event timers into a ring, and a service
> > core in the primary process dequeued them and processed them further.
> > To improve performance, this version does away with the ring and lets
> > lcores in both primary and secondary processes insert timers directly
> > into timer skiplist data structures; the service core directly
> > accesses the lists as well, when looking for timers that have expired.
> How do you ensure concurrent access to the timer skiplist? Are you using any
> locks or is it a lock-free data structure?
>
> <snip>
There are multiple timer skiplists, one for each lcore, and each has its lock that is acquired as necessary when adding or removing timers from the skiplists. This locking occurs in the underlying timer library, in the timer reset and stop functions.
Regards,
Erik
next prev parent reply other threads:[~2019-04-26 18:58 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-29 23:35 [dpdk-dev] [PATCH 0/3] " Erik Gabriel Carrillo
2018-11-29 23:35 ` [dpdk-dev] [PATCH 1/3] timer: allow timer management in shared memory Erik Gabriel Carrillo
2018-11-29 23:35 ` [dpdk-dev] [PATCH 2/3] timer: add function to stop all timers in a list Erik Gabriel Carrillo
2018-11-29 23:35 ` [dpdk-dev] [PATCH 3/3] eventdev: add new software event timer adapter Erik Gabriel Carrillo
2018-11-30 7:26 ` [dpdk-dev] [PATCH 0/3] " Pavan Nikhilesh
2018-11-30 19:07 ` Carrillo, Erik G
2018-12-07 17:52 ` [dpdk-dev] [PATCH v2 0/2] Timer library changes Erik Gabriel Carrillo
2018-12-07 17:52 ` [dpdk-dev] [PATCH v2 1/2] timer: allow timer management in shared memory Erik Gabriel Carrillo
2018-12-07 18:10 ` Stephen Hemminger
2018-12-07 19:21 ` Carrillo, Erik G
2018-12-07 17:53 ` [dpdk-dev] [PATCH v2 2/2] timer: add function to stop all timers in a list Erik Gabriel Carrillo
2018-12-13 22:26 ` [dpdk-dev] [PATCH v3 0/2] Timer library changes Erik Gabriel Carrillo
2018-12-13 22:26 ` [dpdk-dev] [PATCH v3 1/2] timer: allow timer management in shared memory Erik Gabriel Carrillo
2018-12-13 22:26 ` [dpdk-dev] [PATCH v3 2/2] timer: add function to stop all timers in a list Erik Gabriel Carrillo
2018-12-19 3:35 ` [dpdk-dev] [PATCH v3 0/2] Timer library changes Thomas Monjalon
2018-12-19 7:33 ` Mattias Rönnblom
2019-03-05 22:41 ` Carrillo, Erik G
2019-03-05 22:58 ` [dpdk-dev] [dpdk-techboard] " Thomas Monjalon
2019-03-06 18:54 ` Carrillo, Erik G
2019-03-06 20:17 ` Thomas Monjalon
2019-03-06 2:39 ` [dpdk-dev] " Varghese, Vipin
2019-03-06 15:15 ` Carrillo, Erik G
2019-03-07 2:33 ` Varghese, Vipin
2019-03-06 17:20 ` [dpdk-dev] [PATCH v4 " Erik Gabriel Carrillo
2019-03-06 17:20 ` [dpdk-dev] [PATCH v4 1/2] timer: allow timer management in shared memory Erik Gabriel Carrillo
2019-03-20 13:52 ` Sanford, Robert
2019-03-20 13:52 ` Sanford, Robert
2019-03-21 1:01 ` Carrillo, Erik G
2019-03-21 1:01 ` Carrillo, Erik G
2019-03-27 14:03 ` Thomas Monjalon
2019-03-27 14:03 ` Thomas Monjalon
2019-03-28 12:42 ` Carrillo, Erik G
2019-03-28 12:42 ` Carrillo, Erik G
2019-04-15 21:49 ` Carrillo, Erik G
2019-04-15 21:49 ` Carrillo, Erik G
2019-03-06 17:20 ` [dpdk-dev] [PATCH v4 2/2] timer: add function to stop all timers in a list Erik Gabriel Carrillo
2019-04-15 21:41 ` [dpdk-dev] [PATCH v5 0/2] Timer library changes Erik Gabriel Carrillo
2019-04-15 21:41 ` Erik Gabriel Carrillo
2019-04-15 21:41 ` [dpdk-dev] [PATCH v5 1/2] timer: allow timer management in shared memory Erik Gabriel Carrillo
2019-04-15 21:41 ` Erik Gabriel Carrillo
2019-04-17 17:09 ` Thomas Monjalon
2019-04-17 17:09 ` Thomas Monjalon
2019-04-15 21:41 ` [dpdk-dev] [PATCH v5 2/2] timer: add function to stop all timers in a list Erik Gabriel Carrillo
2019-04-15 21:41 ` Erik Gabriel Carrillo
2019-04-17 19:54 ` [dpdk-dev] [PATCH v5 0/2] Timer library changes Thomas Monjalon
2019-04-17 19:54 ` Thomas Monjalon
2018-12-07 20:34 ` [dpdk-dev] [PATCH v2 0/1] New software event timer adapter Erik Gabriel Carrillo
2018-12-07 20:34 ` [dpdk-dev] [PATCH v2 1/1] eventdev: add new " Erik Gabriel Carrillo
2018-12-09 19:17 ` Mattias Rönnblom
2018-12-10 17:17 ` Carrillo, Erik G
2018-12-14 15:45 ` [dpdk-dev] [PATCH v3 0/1] New " Erik Gabriel Carrillo
2018-12-14 15:45 ` [dpdk-dev] [PATCH v3 1/1] eventdev: add new " Erik Gabriel Carrillo
2018-12-14 21:15 ` Mattias Rönnblom
2018-12-14 23:04 ` Carrillo, Erik G
2018-12-14 23:15 ` [dpdk-dev] [PATCH v4 0/1] New " Erik Gabriel Carrillo
2018-12-14 23:15 ` [dpdk-dev] [PATCH v4 1/1] eventdev: add new " Erik Gabriel Carrillo
2018-12-18 20:11 ` [dpdk-dev] [EXT] [PATCH v4 0/1] New " Jerin Jacob Kollanukkaran
2018-12-18 20:14 ` Carrillo, Erik G
2019-04-22 14:57 ` [dpdk-dev] [PATCH v5 " Erik Gabriel Carrillo
2019-04-22 14:57 ` Erik Gabriel Carrillo
2019-04-22 14:57 ` [dpdk-dev] [PATCH v5 1/1] eventdev: add new " Erik Gabriel Carrillo
2019-04-22 14:57 ` Erik Gabriel Carrillo
2019-04-26 15:14 ` [dpdk-dev] [PATCH v6 0/1] New " Erik Gabriel Carrillo
2019-04-26 15:14 ` Erik Gabriel Carrillo
2019-04-26 15:14 ` [dpdk-dev] [PATCH v6 1/1] eventdev: add new " Erik Gabriel Carrillo
2019-04-26 15:14 ` Erik Gabriel Carrillo
2019-04-26 18:51 ` Honnappa Nagarahalli
2019-04-26 18:51 ` Honnappa Nagarahalli
2019-04-26 18:58 ` Carrillo, Erik G [this message]
2019-04-26 18:58 ` Carrillo, Erik G
2019-06-05 13:34 ` Jerin Jacob Kollanukkaran
2019-06-19 15:14 ` [dpdk-dev] [PATCH v7 0/1] New " Erik Gabriel Carrillo
2019-06-19 15:14 ` [dpdk-dev] [PATCH v7 1/1] eventdev: add new " Erik Gabriel Carrillo
2019-06-19 16:25 ` [dpdk-dev] [PATCH v8 0/1] New " Erik Gabriel Carrillo
2019-06-19 16:25 ` [dpdk-dev] [PATCH v8 1/1] eventdev: add new " Erik Gabriel Carrillo
2019-06-24 6:12 ` Jerin Jacob Kollanukkaran
2019-06-25 6:06 ` Jerin Jacob Kollanukkaran
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