在 2022/5/7 下午11:28, Jens Axboe 写道:
On 5/7/22 8:06 AM, Hao Xu wrote:
Let multishot support multishot mode, currently only add accept as its
first comsumer.
consumer
theoretical analysis:
1) when connections come in fast
- singleshot:
add accept sqe(userpsace) --> accept inline
userspace
^ |
|-----------------|
- multishot:
add accept sqe(userspace) --> accept inline
^ |
|--*--|
we do accept repeatedly in * place until get EAGAIN
2) when connections come in at a low pressure
similar thing like 1), we reduce a lot of userspace-kernel context
switch and useless vfs_poll()
Overall this looks better than v2 for sure, just some minor tweaks
needed I believe.
But we still need to consider direct accept with multishot... Should
probably be an add-on patch as I think it'd get a bit more complicated
if we need to be able to cheaply find an available free fixed fd slot.
I'll try and play with that.
I'm tending to use a new mail account to send v4 rather than the gmail
account since the git issue seems to be network related.
I'll also think about the fixed fd problem.
Thanks,
Hao
