From: "Morten Brørup" <mb@smartsharesystems.com>
To: "Ananyev, Konstantin" <konstantin.ananyev@intel.com>,
"Stephen Hemminger" <stephen@networkplumber.org>,
"Jerin Jacob" <jerinjacobk@gmail.com>
Cc: "dpdk-dev" <dev@dpdk.org>,
"Olivier Matz" <olivier.matz@6wind.com>, <drc@linux.vnet.ibm.com>
Subject: Re: [dpdk-dev] [RFC 0/6] New sync modes for ring
Date: Wed, 26 Feb 2020 17:53:18 +0100 [thread overview]
Message-ID: <98CBD80474FA8B44BF855DF32C47DC35C60E41@smartserver.smartshare.dk> (raw)
In-Reply-To: <SN6PR11MB255845FB6665C2A2D5D76D229AED0@SN6PR11MB2558.namprd11.prod.outlook.com>
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Ananyev,
> Konstantin
>
<snip>
> > > > > More and more customers use(/try to use) DPDK based apps within
> > > > > overcommitted systems (multiple acttive threads over same
> pysical cores):
> > > > > VM, container deployments, etc.
<snip>
> > > > > That makes current rte_ring implementation to perform
> > > > > really pure on some overcommited scenarios.
> > > >
> > > > Rather than reform rte_ring to fit this scenario, it would make
> > > > more sense to me to introduce another primitive.
>
> I don't see much advantages it will bring us.
> As a disadvantages, for developers and maintainers - code duplication,
> for end users - extra code churn and removed ability to mix and match
> different sync modes in one ring.
>
I strongly agree with Konstantin on this.
Please consider this discussion at a higher abstraction level:
As DPDK applications grow in number and popularity, people will deploy them in overcommitted systems. In this scenario, I consider it extremely unlikely that the user is able to dedicate N physical cores to N specific lcores of the M total lcores of the DPDK application. In the typical hypervisor scenario, the user will be able to assign a number of virtual CPUs to the virtual machine running the DPDK application, and these vCPUs will either be dedicated to the virtual machine or shared with other virtual machines.
DPDK is currently designed for dedicated CPUs only. If a user runs it on shared vCPUs, the user is violating an important DPDK precondition, and DPDK's behavior is undefined!
Adding the ability to run DPDK applications on shared vCPUs would be a great improvement.
I prefer that support for this is as painless as possible for the DPDK application developer.
Perhaps run-time detection during the EAL initialization could be a solution. The EAL would then configure relevant libraries to use the appropriate synchronization primitives.
Med venlig hilsen / kind regards
- Morten Brørup
next prev parent reply other threads:[~2020-02-26 16:53 UTC|newest]
Thread overview: 146+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-24 11:35 Konstantin Ananyev
2020-02-24 11:35 ` [dpdk-dev] [RFC 1/6] test/ring: add contention stress test Konstantin Ananyev
2020-02-24 11:35 ` [dpdk-dev] [RFC 2/6] ring: rework ring layout to allow new sync schemes Konstantin Ananyev
2020-02-24 11:35 ` [dpdk-dev] [RFC 3/6] ring: introduce RTS ring mode Konstantin Ananyev
2020-02-24 11:35 ` [dpdk-dev] [RFC 4/6] test/ring: add contention stress test for RTS ring Konstantin Ananyev
2020-02-24 11:35 ` [dpdk-dev] [RFC 5/6] ring: introduce HTS ring mode Konstantin Ananyev
2020-03-25 20:44 ` Honnappa Nagarahalli
2020-03-26 12:26 ` Ananyev, Konstantin
2020-02-24 11:35 ` [dpdk-dev] [RFC 6/6] test/ring: add contention stress test for HTS ring Konstantin Ananyev
2020-02-24 16:59 ` [dpdk-dev] [RFC 0/6] New sync modes for ring Stephen Hemminger
2020-02-24 17:59 ` Jerin Jacob
2020-02-24 19:35 ` Stephen Hemminger
2020-02-24 20:52 ` Honnappa Nagarahalli
2020-02-25 11:45 ` Ananyev, Konstantin
2020-02-25 13:41 ` Ananyev, Konstantin
2020-02-26 16:53 ` Morten Brørup [this message]
2020-02-27 10:31 ` Jerin Jacob
2020-02-28 0:17 ` David Christensen
2020-03-20 16:45 ` Ananyev, Konstantin
2020-02-25 0:58 ` Honnappa Nagarahalli
2020-02-25 15:14 ` Ananyev, Konstantin
2020-03-25 20:43 ` Honnappa Nagarahalli
2020-03-26 1:50 ` Ananyev, Konstantin
2020-03-30 21:29 ` Honnappa Nagarahalli
2020-03-30 23:37 ` Honnappa Nagarahalli
2020-03-31 17:21 ` Ananyev, Konstantin
2020-03-31 16:43 ` [dpdk-dev] [PATCH v1 0/8] " Konstantin Ananyev
2020-03-31 16:43 ` [dpdk-dev] [PATCH v1 1/8] test/ring: add contention stress test Konstantin Ananyev
2020-03-31 16:43 ` [dpdk-dev] [PATCH v1 2/8] ring: prepare ring to allow new sync schemes Konstantin Ananyev
2020-03-31 16:43 ` [dpdk-dev] [PATCH v1 3/8] ring: introduce RTS ring mode Konstantin Ananyev
2020-03-31 16:43 ` [dpdk-dev] [PATCH v1 4/8] test/ring: add contention stress test for RTS ring Konstantin Ananyev
2020-03-31 16:43 ` [dpdk-dev] [PATCH v1 5/8] ring: introduce HTS ring mode Konstantin Ananyev
2020-03-31 16:43 ` [dpdk-dev] [PATCH v1 6/8] test/ring: add contention stress test for HTS ring Konstantin Ananyev
2020-03-31 16:43 ` [dpdk-dev] [PATCH v1 7/8] ring: introduce peek style API Konstantin Ananyev
2020-03-31 16:43 ` [dpdk-dev] [PATCH v1 8/8] test/ring: add stress test for MT peek API Konstantin Ananyev
2020-04-02 22:09 ` [dpdk-dev] [PATCH v2 0/9] New sync modes for ring Konstantin Ananyev
2020-04-02 22:09 ` [dpdk-dev] [PATCH v2 1/9] test/ring: add contention stress test Konstantin Ananyev
2020-04-02 22:09 ` [dpdk-dev] [PATCH v2 2/9] ring: prepare ring to allow new sync schemes Konstantin Ananyev
2020-04-02 22:09 ` [dpdk-dev] [PATCH v2 3/9] ring: introduce RTS ring mode Konstantin Ananyev
2020-04-02 22:09 ` [dpdk-dev] [PATCH v2 4/9] test/ring: add contention stress test for RTS ring Konstantin Ananyev
2020-04-02 22:09 ` [dpdk-dev] [PATCH v2 5/9] ring: introduce HTS ring mode Konstantin Ananyev
2020-04-02 22:09 ` [dpdk-dev] [PATCH v2 6/9] test/ring: add contention stress test for HTS ring Konstantin Ananyev
2020-04-02 22:09 ` [dpdk-dev] [PATCH v2 7/9] ring: introduce peek style API Konstantin Ananyev
2020-04-02 22:09 ` [dpdk-dev] [PATCH v2 8/9] test/ring: add stress test for MT peek API Konstantin Ananyev
2020-04-02 22:09 ` [dpdk-dev] [PATCH v2 9/9] ring: add C11 memory model for new sync modes Konstantin Ananyev
2020-04-03 17:42 ` [dpdk-dev] [PATCH v3 0/9] New sync modes for ring Konstantin Ananyev
2020-04-03 17:42 ` [dpdk-dev] [PATCH v3 1/9] test/ring: add contention stress test Konstantin Ananyev
2020-04-08 4:59 ` Honnappa Nagarahalli
2020-04-09 12:36 ` Ananyev, Konstantin
2020-04-09 13:00 ` Ananyev, Konstantin
2020-04-10 18:01 ` Honnappa Nagarahalli
2020-04-10 16:59 ` Honnappa Nagarahalli
2020-04-03 17:42 ` [dpdk-dev] [PATCH v3 2/9] ring: prepare ring to allow new sync schemes Konstantin Ananyev
2020-04-08 4:59 ` Honnappa Nagarahalli
2020-04-09 13:39 ` Ananyev, Konstantin
2020-04-10 20:15 ` Honnappa Nagarahalli
2020-04-03 17:42 ` [dpdk-dev] [PATCH v3 3/9] ring: introduce RTS ring mode Konstantin Ananyev
2020-04-04 17:27 ` Wang, Haiyue
2020-04-08 5:00 ` Honnappa Nagarahalli
2020-04-09 14:52 ` Ananyev, Konstantin
2020-04-10 23:10 ` Honnappa Nagarahalli
2020-04-13 14:29 ` David Marchand
2020-04-13 16:42 ` Honnappa Nagarahalli
2020-04-14 13:47 ` David Marchand
2020-04-14 15:57 ` Honnappa Nagarahalli
2020-04-14 16:21 ` Ananyev, Konstantin
2020-04-14 13:18 ` Ananyev, Konstantin
2020-04-14 15:58 ` Honnappa Nagarahalli
2020-04-03 17:42 ` [dpdk-dev] [PATCH v3 4/9] test/ring: add contention stress test for RTS ring Konstantin Ananyev
2020-04-03 17:42 ` [dpdk-dev] [PATCH v3 5/9] ring: introduce HTS ring mode Konstantin Ananyev
2020-04-13 23:27 ` Honnappa Nagarahalli
2020-04-14 16:12 ` Ananyev, Konstantin
2020-04-14 17:06 ` Honnappa Nagarahalli
2020-04-03 17:42 ` [dpdk-dev] [PATCH v3 6/9] test/ring: add contention stress test for HTS ring Konstantin Ananyev
2020-04-03 17:42 ` [dpdk-dev] [PATCH v3 7/9] ring: introduce peek style API Konstantin Ananyev
2020-04-14 3:45 ` Honnappa Nagarahalli
2020-04-14 16:47 ` Ananyev, Konstantin
2020-04-14 17:30 ` Honnappa Nagarahalli
2020-04-14 22:24 ` Ananyev, Konstantin
2020-04-03 17:42 ` [dpdk-dev] [PATCH v3 8/9] test/ring: add stress test for MT peek API Konstantin Ananyev
2020-04-03 17:42 ` [dpdk-dev] [PATCH v3 9/9] ring: add C11 memory model for new sync modes Konstantin Ananyev
2020-04-04 14:16 ` [dpdk-dev] 回复：[PATCH " 周介龙
2020-04-14 4:28 ` [dpdk-dev] [PATCH " Honnappa Nagarahalli
2020-04-14 18:29 ` Ananyev, Konstantin
2020-04-15 20:28 ` Ananyev, Konstantin
2020-04-17 13:36 ` [dpdk-dev] [PATCH v4 0/9] New sync modes for ring Konstantin Ananyev
2020-04-17 13:36 ` [dpdk-dev] [PATCH v4 1/9] test/ring: add contention stress test Konstantin Ananyev
2020-04-17 13:36 ` [dpdk-dev] [PATCH v4 2/9] ring: prepare ring to allow new sync schemes Konstantin Ananyev
2020-04-17 13:36 ` [dpdk-dev] [PATCH v4 3/9] ring: introduce RTS ring mode Konstantin Ananyev
2020-04-17 13:36 ` [dpdk-dev] [PATCH v4 4/9] test/ring: add contention stress test for RTS ring Konstantin Ananyev
2020-04-17 13:36 ` [dpdk-dev] [PATCH v4 5/9] ring: introduce HTS ring mode Konstantin Ananyev
2020-04-17 13:36 ` [dpdk-dev] [PATCH v4 6/9] test/ring: add contention stress test for HTS ring Konstantin Ananyev
2020-04-17 13:36 ` [dpdk-dev] [PATCH v4 7/9] ring: introduce peek style API Konstantin Ananyev
2020-04-17 13:36 ` [dpdk-dev] [PATCH v4 8/9] test/ring: add stress test for MT peek API Konstantin Ananyev
2020-04-17 13:36 ` [dpdk-dev] [PATCH v4 9/9] test/ring: add functional tests for new sync modes Konstantin Ananyev
2020-04-18 16:32 ` [dpdk-dev] [PATCH v5 0/9] New sync modes for ring Konstantin Ananyev
2020-04-18 16:32 ` [dpdk-dev] [PATCH v5 1/9] test/ring: add contention stress test Konstantin Ananyev
2020-04-19 2:30 ` Honnappa Nagarahalli
2020-04-19 8:03 ` David Marchand
2020-04-19 11:47 ` Ananyev, Konstantin
2020-04-18 16:32 ` [dpdk-dev] [PATCH v5 2/9] ring: prepare ring to allow new sync schemes Konstantin Ananyev
2020-04-19 2:31 ` Honnappa Nagarahalli
2020-04-18 16:32 ` [dpdk-dev] [PATCH v5 3/9] ring: introduce RTS ring mode Konstantin Ananyev
2020-04-19 2:31 ` Honnappa Nagarahalli
2020-04-18 16:32 ` [dpdk-dev] [PATCH v5 4/9] test/ring: add contention stress test for RTS ring Konstantin Ananyev
2020-04-19 2:31 ` Honnappa Nagarahalli
2020-04-18 16:32 ` [dpdk-dev] [PATCH v5 5/9] ring: introduce HTS ring mode Konstantin Ananyev
2020-04-19 2:31 ` Honnappa Nagarahalli
2020-04-18 16:32 ` [dpdk-dev] [PATCH v5 6/9] test/ring: add contention stress test for HTS ring Konstantin Ananyev
2020-04-19 2:31 ` Honnappa Nagarahalli
2020-04-18 16:32 ` [dpdk-dev] [PATCH v5 7/9] ring: introduce peek style API Konstantin Ananyev
2020-04-19 2:31 ` Honnappa Nagarahalli
2020-04-19 18:32 ` Ananyev, Konstantin
2020-04-19 19:12 ` Ananyev, Konstantin
2020-04-19 21:14 ` Honnappa Nagarahalli
2020-04-19 22:41 ` Ananyev, Konstantin
2020-04-18 16:32 ` [dpdk-dev] [PATCH v5 8/9] test/ring: add stress test for MT peek API Konstantin Ananyev
2020-04-19 2:32 ` Honnappa Nagarahalli
2020-04-18 16:32 ` [dpdk-dev] [PATCH v5 9/9] test/ring: add functional tests for new sync modes Konstantin Ananyev
2020-04-19 2:32 ` Honnappa Nagarahalli
2020-04-19 2:32 ` [dpdk-dev] [PATCH v5 0/9] New sync modes for ring Honnappa Nagarahalli
2020-04-20 12:11 ` [dpdk-dev] [PATCH v6 00/10] " Konstantin Ananyev
2020-04-20 12:11 ` [dpdk-dev] [PATCH v6 01/10] test/ring: add contention stress test Konstantin Ananyev
2020-04-20 12:11 ` [dpdk-dev] [PATCH v6 02/10] ring: prepare ring to allow new sync schemes Konstantin Ananyev
2020-04-20 12:11 ` [dpdk-dev] [PATCH v6 03/10] ring: introduce RTS ring mode Konstantin Ananyev
2020-04-20 12:11 ` [dpdk-dev] [PATCH v6 04/10] test/ring: add contention stress test for RTS ring Konstantin Ananyev
2020-04-20 12:11 ` [dpdk-dev] [PATCH v6 05/10] ring: introduce HTS ring mode Konstantin Ananyev
2020-04-20 12:11 ` [dpdk-dev] [PATCH v6 06/10] test/ring: add contention stress test for HTS ring Konstantin Ananyev
2020-04-20 12:11 ` [dpdk-dev] [PATCH v6 07/10] ring: introduce peek style API Konstantin Ananyev
2020-04-20 12:11 ` [dpdk-dev] [PATCH v6 08/10] test/ring: add stress test for MT peek API Konstantin Ananyev
2020-04-20 12:11 ` [dpdk-dev] [PATCH v6 09/10] test/ring: add functional tests for new sync modes Konstantin Ananyev
2020-04-20 12:11 ` [dpdk-dev] [PATCH v6 10/10] doc: update ring guide Konstantin Ananyev
2020-04-20 13:47 ` David Marchand
2020-04-20 14:07 ` Ananyev, Konstantin
2020-04-20 12:28 ` [dpdk-dev] [PATCH v7 00/10] New sync modes for ring Konstantin Ananyev
2020-04-20 12:28 ` [dpdk-dev] [PATCH v7 01/10] test/ring: add contention stress test Konstantin Ananyev
2020-04-20 12:28 ` [dpdk-dev] [PATCH v7 02/10] ring: prepare ring to allow new sync schemes Konstantin Ananyev
2020-04-20 12:28 ` [dpdk-dev] [PATCH v7 03/10] ring: introduce RTS ring mode Konstantin Ananyev
2020-04-20 12:28 ` [dpdk-dev] [PATCH v7 04/10] test/ring: add contention stress test for RTS ring Konstantin Ananyev
2020-04-20 12:28 ` [dpdk-dev] [PATCH v7 05/10] ring: introduce HTS ring mode Konstantin Ananyev
2020-04-20 12:28 ` [dpdk-dev] [PATCH v7 06/10] test/ring: add contention stress test for HTS ring Konstantin Ananyev
2020-04-20 12:28 ` [dpdk-dev] [PATCH v7 07/10] ring: introduce peek style API Konstantin Ananyev
2020-04-20 12:28 ` [dpdk-dev] [PATCH v7 08/10] test/ring: add stress test for MT peek API Konstantin Ananyev
2020-04-20 12:28 ` [dpdk-dev] [PATCH v7 09/10] test/ring: add functional tests for new sync modes Konstantin Ananyev
2020-04-20 12:28 ` [dpdk-dev] [PATCH v7 10/10] doc: update ring guide Konstantin Ananyev
2020-04-21 11:31 ` [dpdk-dev] [PATCH v7 00/10] New sync modes for ring David Marchand
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