the content of ceph.conf ? On Fri, Mar 24, 2017 at 4:32 AM, Hung-Wei Chiu (邱宏瑋) <hwc...@cs.nctu.edu.tw> wrote:
> Hi Deepak. > > Thansk your reply, > > I try to use gperf to profile the ceph-osd with basic mode (without RDMA) > and you can see the result in the following link. > http://imgur.com/a/SJgEL > > In the gperf result, we can see the whole CPU usage can divided into three > significant part, (Network: 36%, FileStore: 17% PG related:29%). > Do you have any idea about this? > > Thanks. > > > Best Regards, > > Hung-Wei Chiu(邱宏瑋) > -- > Computer Center, Department of Computer Science > National Chiao Tung University > > 2017-03-24 14:31 GMT+08:00 Deepak Naidu <dna...@nvidia.com>: > >> >>Now, the kernel can decrease the CPU cycle usages for network I/O >> processing because of RDMA enabled (right?). >> >> Yes, kernel should have comparatively free cycles when using RDMA over TCP >> >> >>does it means host can provide more CPU for other processing, such as >> Disk I/O ? >> >> This can be subjective, bcos let's say u have an IO process which takes >> 10 mins over TCP then when using RDMA it might be 3 mins as your CPU cycles >> are less used by RDMA but if ur application process which provides the RDMA >> functionality might have processing cycles as well, which might use CPU >> cycles as well, example client or fuse plugins on the host getting it ? >> >> >> -- >> Deepak >> >> > On Mar 23, 2017, at 11:10 PM, Hung-Wei Chiu (邱宏瑋) < >> hwc...@cs.nctu.edu.tw> wrote: >> > >> > Now, the kernel can decrease the CPU cycle usages for network I/O >> processing because of RDMA enabled (right?). >> > does it means host can provide more CPU for other processing, such as >> Disk I/O ? >> >> ------------------------------------------------------------ >> ----------------------- >> This email message is for the sole use of the intended recipient(s) and >> may contain >> confidential information. Any unauthorized review, use, disclosure or >> distribution >> is prohibited. If you are not the intended recipient, please contact the >> sender by >> reply email and destroy all copies of the original message. >> ------------------------------------------------------------ >> ----------------------- >> > >
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