On 07/19/2011 08:14 PM, Jan Kiszka wrote:
Another improvement - unfortunately less transparent for user space - would be to overcome the single ring buffer that forces us to hold a central lock in user space while processing the entries. We rather need per-device rings. While waiting for coalesced VGA MMIO being processed, way too many kittens are killed. I have this on our agenda, but I wouldn't be disappointed as well if someone else is faster.
The socket mmio would have accomplished this as well. One thing to beware of is to preserve correctness:
1) write to 0xa0000 (queued) 2) write to 0xa0002 (queued) 3) remap 0xa0000 region (executed) 4) write to 0xa000 (queued) 5) drain queue writes 1 and 2 go to the wrong place. -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
