From: Yuanhan Liu <yuanhan.liu@linux.intel.com>
To: Jan Wickbom <jan.wickbom@ericsson.com>
Cc: dev@dpdk.org, patrik.r.andersson@ericsson.com
Subject: Re: [dpdk-dev] [PATCH] vhost: allow for many vhost user ports
Date: Wed, 7 Dec 2016 18:12:57 +0800 [thread overview]
Message-ID: <20161207101257.GK31182@yliu-dev.sh.intel.com> (raw)
In-Reply-To: <1480606010-6132-1-git-send-email-jan.wickbom@ericsson.com>
On Thu, Dec 01, 2016 at 04:26:50PM +0100, Jan Wickbom wrote:
> static int
> -fdset_fill(fd_set *rfset, fd_set *wfset, struct fdset *pfdset)
> +fdset_fill(struct pollfd *rwfds, struct fdset *pfdset)
> {
> struct fdentry *pfdentry;
> - int i, maxfds = -1;
> - int num = MAX_FDS;
> -
> - if (pfdset == NULL)
> - return -1;
> + int i;
> + int num;
>
> - for (i = 0; i < num; i++) {
> + for (i = 0, num = pfdset->num; i < num; i++) {
> pfdentry = &pfdset->fd[i];
> - if (pfdentry->fd != -1) {
> - int added = 0;
> - if (pfdentry->rcb && rfset) {
> - FD_SET(pfdentry->fd, rfset);
> - added = 1;
> - }
> - if (pfdentry->wcb && wfset) {
> - FD_SET(pfdentry->fd, wfset);
> - added = 1;
> - }
> - if (added)
> - maxfds = pfdentry->fd < maxfds ?
> - maxfds : pfdentry->fd;
> +
> + if (pfdentry->fd < 0) {
> + /* Hole in the list. Move the last one here */
> +
> + *pfdentry = pfdset->fd[num - 1];
> + pfdset->fd[num - 1].fd = -1;
> + num = fdset_adjust_num(pfdset);
> }
> + rwfds[i].fd = pfdentry->fd;
> + rwfds[i].events = pfdentry->rcb ? POLLIN : 0;
> + rwfds[i].events |= pfdentry->wcb ? POLLOUT : 0;
Another thing is we don't have to re-init this rwfds array again
and again. Instead, we could
- set it up correctly when fdset_add is invoked: set the fd and
events.
- reset revents when it's been handled at fdset_event_dispatch().
- swap with the last one and shrink the array on fd delete
Could you make a follow up patch for that?
Thanks.
--yliu
next prev parent reply other threads:[~2016-12-07 10:12 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-01 15:26 Jan Wickbom
2016-12-06 6:56 ` Yuanhan Liu
2016-12-06 11:42 ` Jan Wickbom
2016-12-07 7:43 ` Yuanhan Liu
2016-12-07 10:12 ` Yuanhan Liu [this message]
2016-12-07 13:23 ` Jan Wickbom
2016-12-08 5:50 ` Yuanhan Liu
2016-12-12 16:55 ` Jan Wickbom
2016-12-07 12:46 ` [dpdk-dev] [PATCH v2] " Jan Wickbom
2016-12-12 16:50 ` [dpdk-dev] [PATCH v3] " Jan Wickbom
2016-12-13 9:14 ` Yuanhan Liu
2016-12-13 13:15 ` Jan Wickbom
2016-12-13 13:19 ` [dpdk-dev] [PATCH v4] " Jan Wickbom
2016-12-14 3:25 ` Yuanhan Liu
2016-12-14 15:30 ` [dpdk-dev] [PATCH v5] " Jan Wickbom
2016-12-21 9:45 ` [dpdk-dev] [PATCH v6] " Yuanhan Liu
2016-12-21 18:06 ` Stephen Hemminger
2016-12-22 3:16 ` Yuanhan Liu
2017-01-12 4:05 ` Yuanhan Liu
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