From: Dan Smith <danms@xxxxxxxxxx> Subject: Re: dm-userspace (no in-kernel cache version) Date: Tue, 12 Sep 2006 14:50:02 -0700 > 2. I was unable to get your code to perform well with multiple threads > of dbench. While my code sustains performance with 16 threads, the > non-cache/ringbuffer version slows to a crawl (~1MB/s with 16 > procs). I noticed that the request list grows to over a 100,000 > entries at times, which means that the response from userspace > requires searching that linearly, which may be the issue. Have you tried SCHED_FIFO? By the way, can you upload or post the latest kernel and user-space code? -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
