> On 03/10/2014 05:53, Kouhei Kaigai wrote: > > Yep, that's my pain. Even though usual query does not take many > > buffers pinned, my use case needs to fetch megabytes scale data at > > once because of performance reason; page-by-page synchronous scan makes > GPU being idle. > Doesn't your GPU have an async queue and exec mechanism? Then you could > do an asyn DMA to the GPU with an event, use that event in he GPU to start > the kernel and in the DB to release the pin? > That is exactly what I'm doing now. Problem is, it needs to keep multiple buffers (likely, more than a few dozen thousands) in the queue not to make GPU waiting for the data to be calculated. Thus, I want to pin relatively many buffers than usual query workloads.
Thanks, -- NEC OSS Promotion Center / PG-Strom Project KaiGai Kohei <kai...@ak.jp.nec.com> -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
