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 at 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 >>> >>> >>> >
