On Thu, Jun 16, 2016 at 2:01 PM, Miklos Szeredi <miklos@xxxxxxxxxx> wrote: > On Thu, Jun 16, 2016 at 1:51 PM, Sedat Dilek <sedat.dilek@xxxxxxxxx> wrote: >> On Thu, Jun 16, 2016 at 1:25 PM, Miklos Szeredi <miklos@xxxxxxxxxx> wrote: >>> On Thu, Apr 7, 2016 at 1:48 PM, Ashish Sangwan <ashishsangwan2@xxxxxxxxx> wrote: >>>> While sending the blocking directIO in fuse, the write request is broken >>>> into sub-requests, each of default size 128k and all the requests are sent >>>> in non-blocking background mode if async_dio mode is supported by libfuse. >>>> The process which issue the write wait for the completion of all the >>>> sub-requests. Sending multiple requests parallely gives a chance to perform >>>> parallel writes in the user space fuse implementation if it is >>>> multi-threaded and hence improves the performance. >>>> >>>> When there is a size extending aio dio write, we switch to >>>> blocking mode so that we can properly update the size of the file after >>>> completion of the writes. However, in this situation all the sub-requests >>>> are sent in serialized manner where the next request is sent only after >>>> receiving the reply of the current request. Hence the multi-threaded user >>>> space implementation is not utilized properly. >>>> >>>> This patch changes the size extending aio dio behavior to exactly follow >>>> blocking dio. For multi threaded fuse implementation having 10 threads and >>>> using buffer size of 64MB to perform async directIO, we are getting double >>>> the speed. >>>> >>>> Signed-off-by: Ashish Sangwan <ashishsangwan2@xxxxxxxxx> >>> >>> Thanks for you patience. Pushed to >>> >>> git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.git for-next >>> >>> I simplified the logic, please verify that I didn't mess something up. >>> >> >> Hi, >> >> I would like to test fuse-next on Ubuntu/precise aka 12.04-LTS AMD64. >> >> Do I need a modern version of libfuse? >> Libfuse v2.8.6 is installed here. > > Fuse will work fine but AFAICS the "async_dio" option was not added to > a 2.X release (it could be backported quite simply if needed). > Can you point me to - preferable - a Git repo of libfuse? And the commit for backporting? Thanks. - Sedat - -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
