From: Vincent JARDIN <vincent.jardin@6wind.com>
To: March Jane <unix.march@gmail.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] Scenario of dpdk-iokit //Re: Fwd: dpdk-iokit: Turn dpdk into the IO field.
Date: Tue, 19 Nov 2013 11:29:23 +0100 [thread overview]
Message-ID: <528B3D83.6040900@6wind.com> (raw)
In-Reply-To: <A144C8B9-7BF3-4FF6-A49C-ECEAE685CB0B@gmail.com>
so on the list if you prefer to do so ;) did you try a "perf top" on
your system under load?
On 19/11/2013 10:56, March Jane wrote:
>
> Gratitude to reply.
>
> FCP and Full-offload iSCSI will be nice, for example Qlogic 16Gbps FCP.
>
> But IO scenario is very different from IP scenario as my understanding.
>
> March
>
> BTW: Do you have people at Bay Area?
>
>
> PS:
> Already finished header file for dpdk-iokit/libiokit_sctgt
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> On Nov 19, 2013, at 5:45 PM, Vincent JARDIN <vincent.jardin@6wind.com> wrote:
>
>> (off list since it coul become a troll ;) )
>>
>> At 6WIND, we developed a librte_crypto as a generic framework to manage any crypto framework:
>> - Intel's QuickAssist
>> - Cavium' Nitrox II
>> - AES/NI SW crypto
>>
>> it was required in order to manage high rate of PCI IOs for Cryptos (IPsec, SSL, etc...)
>>
>> So, after the librte_pmd_mlx4, Virtio, Vmxnet3, that's more than 6 ultra low latency/very efficient drivers that we added into the DPDK and promoted.
>>
>> Which storage drivers would you foresee first to be run in userland?
>>
>> Best regards,
>>
>>
>> On 19/11/2013 02:22, March Jane wrote:
>>>
>>> — Nowadays dilemmas in enterprise-class storage system & motivation --
>>>
>>> The model of most storage system is ‘Front-end cards + CPU + back-end magnetic media hard drive’, in such system, the hard drive is very slow in terms of its capability in random accessing - roughly 200IO per second, in contrast, the processor is very fast, therefore many software stack can tolerate waste of CPU cycle for exploiting capabilities of hard drive.
>>>
>>> In addition, regularly software for SAN is developed under kernel space in order to achieve low latency - few milliseconds per request, and IO pressure in scenario of heavy workload. Usually software in user-space with POSIX is slow. However kernel-space developing is nightmare for engineers, even we have approaches to simulate these code under user-space.
>>>
>>> However, so far flash is coming to popular, the gap between CPU and media is overturned, a single flash card can be easy to reach 1M iops, if plug 10 such cards inside a server, the processor is hard to back. Thus, today’s challenge in flash storage is to exploit the capability of processor, ironically. In addition to this purpose, move to user-space is also a motivation, if move to user-space is OS-bypass rather than moving to POSIX.
>>>
>>>
>>> Best
>>>
>>> - March
>>>
>>>
>>>
>
prev parent reply other threads:[~2013-11-19 10:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <D3C3E0F5-8023-4B2A-B1E5-71B9BEEFFD94@gmail.com>
2013-11-12 10:27 ` [dpdk-dev] " March Jane
[not found] ` <521D9455-820A-4F8F-A7E7-8380EE1415DF@intel.com>
[not found] ` <E39234CF-B93A-4178-ABA1-452F8051A9A8@intel.com>
[not found] ` <877C1F8553E92F43898365570816082F1ADE612D@IRSMSX103.ger.corp.intel.com>
[not found] ` <47C784D99F4D124BB2973FE5C27BDCF12FB36570@FMSMSX109.amr.corp.intel.com>
[not found] ` <7F974523047D074590B0CBEB8DDF43A70E516CFB@FMSMSX104.amr.corp.intel.com>
[not found] ` <47C784D99F4D124BB2973FE5C27BDCF12FB374A9@FMSMSX109.amr.corp.intel.com>
[not found] ` <9F232B325D833F4494EFCD5B9D49F6C719D5CFC8@IRSMSX103.ger.corp.intel.com>
[not found] ` <00B2C372B6E6DA4FB04934511BF0564A3DE6AEC9@FMSMSX114.amr.corp.intel.com>
2013-11-19 1:22 ` [dpdk-dev] Scenario of dpdk-iokit //Re: " March Jane
[not found] ` <528B3346.3050100@6wind.com>
2013-11-19 9:56 ` March Jane
2013-11-19 10:29 ` Vincent JARDIN [this message]
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