From: Ferruh Yigit <ferruh.yigit@intel.com>
To: "Jakub Grajciar -X (jgrajcia - PANTHEON TECHNOLOGIES at Cisco)"
<jgrajcia@cisco.com>,
"Phil Yang (Arm Technology China)" <Phil.Yang@arm.com>,
"dev@dpdk.org" <dev@dpdk.org>
Cc: "thomas@monjalon.net" <thomas@monjalon.net>,
"jerinj@marvell.com" <jerinj@marvell.com>,
Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>,
"Damjan Marion (damarion)" <damarion@cisco.com>, nd <nd@arm.com>,
"Gavin Hu (Arm Technology China)" <Gavin.Hu@arm.com>
Subject: Re: [dpdk-dev] [PATCH v1] net/memif: optimized with one-way barrier
Date: Mon, 14 Oct 2019 09:59:57 +0100 [thread overview]
Message-ID: <2d816518-c899-70fb-4e18-1b6e1c8c1fef@intel.com> (raw)
In-Reply-To: <6d11f6f6cb1440878a1f2d527576cca6@XCH-ALN-004.cisco.com>
On 10/9/2019 12:17 PM, Jakub Grajciar -X (jgrajcia - PANTHEON TECHNOLOGIES at
Cisco) wrote:
>
>
>>>>> -----Original Message-----
>>>>> From: dev <dev-bounces@dpdk.org> On Behalf Of Phil Yang
>>>>> Sent: Monday, August 26, 2019 7:00 PM
>>>>> To: jgrajcia@cisco.com; dev@dpdk.org
>>>>> Cc: thomas@monjalon.net; jerinj@marvell.com; Honnappa Nagarahalli
>>>>> <Honnappa.Nagarahalli@arm.com>; damarion@cisco.com; nd
>>>> <nd@arm.com>
>>>>> Subject: [dpdk-dev] [PATCH v1] net/memif: optimized with one-way
>>>>> barrier
>>>>>
>>>>> Using 'rte_mb' to synchronize the shared ring head/tail between
>>>>> producer and consumer will stall the pipeline and damage
>>>>> performance on the weak memory model platforms, such like aarch64.
>>>>> Meanwhile update the shared ring head and tail are observable and
>>>>> ordered
>>> between
>>>> CPUs on IA.
>>>>>
>>>>> Optimized this full barrier with the one-way barrier can improve
>>>>> the throughput. On aarch64 n1sdp server this patch make testpmd
>>> throughput
>>>>> boost 2.1%. On Intel E5-2640, testpmd got 3.98% performance gain.
>>>>>
>>>>> Signed-off-by: Phil Yang <phil.yang@arm.com>
>>>>> Reviewed-by: Gavin Hu <gavin.hu@arm.com>
>>>
>>> The patch is looking good, but 'MEMIF_VERSION_MAJOR' in memif.h needs
>>> to be set to 3 as ring pointers are no longer volatile.
>>
>> Updated in v2.
>> Thanks for your comments.
>>
>> Thanks,
>> Phil
>
> I jumped the gun with the version bump. The change doesn't break compatibility. I'm putting reviewed label on v1.
>
> Sorry for the inconvenience.
>
> Reviewed-by: Jakub Grajciar <jgrajcia@cisco.com>
>
Applied to dpdk-next-net/master, thanks.
next prev parent reply other threads:[~2019-10-14 9:00 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-26 11:00 Phil Yang
2019-08-26 11:03 ` Phil Yang (Arm Technology China)
2019-10-08 11:05 ` Jakub Grajciar -X (jgrajcia - PANTHEON TECHNOLOGIES at Cisco)
2019-10-09 2:10 ` Phil Yang (Arm Technology China)
2019-10-09 11:17 ` Jakub Grajciar -X (jgrajcia - PANTHEON TECHNOLOGIES at Cisco)
2019-10-14 8:59 ` Ferruh Yigit [this message]
2019-10-09 2:04 ` [dpdk-dev] [PATCH v2] " Phil Yang
2019-10-09 11:14 ` Jakub Grajciar -X (jgrajcia - PANTHEON TECHNOLOGIES at Cisco)
2019-10-10 14:04 ` David Marchand
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