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From: Thomas Monjalon <thomas@monjalon.net>
To: Konstantin Ananyev <konstantin.ananyev@intel.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v3 2/2] eal/x86: Use lock-prefixed instructions to reduce cost of rte_smp_mb()
Date: Mon, 29 Jan 2018 16:47:45 +0100	[thread overview]
Message-ID: <3552780.vzqTqTtnLr@xps> (raw)
In-Reply-To: <1516028971-3409-1-git-send-email-konstantin.ananyev@intel.com>

15/01/2018 16:09, Konstantin Ananyev:
> On x86 it  is possible to use lock-prefixed instructions to get
> the similar effect as mfence.
> As pointed by Java guys, on most modern HW that gives a better
> performance than using mfence:
> https://shipilev.net/blog/2014/on-the-fence-with-dependencies/
> That patch adopts that technique for rte_smp_mb() implementation.
> On BDW 2.2 mb_autotest on single lcore reports 2X cycle reduction,
> i.e. from ~110 to ~55 cycles per operation.
> 
> Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
> Acked-by: Bruce Richardson <bruce.richardson@intel.com>

Applied, thanks

  parent reply	other threads:[~2018-01-29 15:48 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-01 11:12 [dpdk-dev] [PATCH 1/2] test/test: introduce new test-case for rte_smp_mb() Konstantin Ananyev
2017-12-01 11:12 ` [dpdk-dev] [PATCH 2/2] eal/x86: Use lock-prefixed instructions to reduce cost of rte_smp_mb() Konstantin Ananyev
2017-12-01 18:04   ` Stephen Hemminger
2017-12-01 23:08     ` Ananyev, Konstantin
2018-03-08 21:15       ` Stephen Hemminger
2017-12-11 17:11   ` Bruce Richardson
2017-12-11 17:30     ` Ananyev, Konstantin
2017-12-18 15:34   ` [dpdk-dev] [PATCH v2 0/2] eal/x86: Optimize rte_smp_mb() and create a new test case for it Konstantin Ananyev
2017-12-18 15:34   ` [dpdk-dev] [PATCH v2 1/2] test/test: introduce new test-case for rte_smp_mb() Konstantin Ananyev
2018-01-12 17:23     ` Thomas Monjalon
2018-01-12 17:58       ` Ananyev, Konstantin
2018-01-13 13:54     ` Wiles, Keith
2018-01-13 13:54     ` Wiles, Keith
2018-01-15 15:04     ` [dpdk-dev] [PATCH v3 0/2] eal/x86: Optimize rte_smp_mb() and create a new test case for it Konstantin Ananyev
2018-01-15 15:04     ` [dpdk-dev] [PATCH v3 1/2] test/test: introduce new test-case for rte_smp_mb() Konstantin Ananyev
2018-01-16  0:16       ` Thomas Monjalon
2018-01-15 15:04     ` [dpdk-dev] [PATCH v3 2/2] eal/x86: Use lock-prefixed instructions to reduce cost of rte_smp_mb() Konstantin Ananyev
2018-01-15 15:09       ` Konstantin Ananyev
     [not found]         ` <8b05f533-d146-7f97-48f4-82ddcfc3613b@redhat.com>
2018-01-16  1:54           ` [dpdk-dev] Fwd: " Michael S. Tsirkin
2018-01-29  9:29             ` Ananyev, Konstantin
2018-01-29 17:29               ` Michael S. Tsirkin
2018-01-29 15:47         ` Thomas Monjalon [this message]
2018-01-30 19:33           ` [dpdk-dev] " Stephen Hemminger
2017-12-18 15:34   ` [dpdk-dev] [PATCH v2 " Konstantin Ananyev
2017-12-18 15:46     ` Bruce Richardson
2017-12-11 17:08 ` [dpdk-dev] [PATCH 1/2] test/test: introduce new test-case for rte_smp_mb() Bruce Richardson

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