Re: zero copy code checkin in 2 days, new snapshot
On Mon, Jun 24, 2002 at 01:17:03 -0500, Mike Silbersack wrote: On Sun, 23 Jun 2002, Kenneth D. Merry wrote: I'm planning on checking in the zero copy sockets code Tuesday evening, MDT. If there are any concerns, I'm more than willing to delay it. Out of curiousity, what happens when the page being write()n is a mmap'd page shared by multiple processes? Will the page be shared? That could be a big reduction in mbuf cluster usage on some http/ftp systems, I'd guess. The page would be shared, until one of the processes decides to write to it while it is still referenced in the kernel. If that happens, it'll get copied. Ken -- Kenneth Merry [EMAIL PROTECTED] To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-current in the body of the message
Re: zero copy code checkin in 2 days, new snapshot
Kenneth D. Merry [EMAIL PROTECTED] writes: I'm planning on checking in the zero copy sockets code Tuesday evening, MDT. Great! DES -- Dag-Erling Smorgrav - [EMAIL PROTECTED] To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-current in the body of the message
Re: zero copy code checkin in 2 days, new snapshot
On Mon, 24 Jun 2002, Kenneth D. Merry wrote: On Mon, Jun 24, 2002 at 01:17:03 -0500, Mike Silbersack wrote: On Sun, 23 Jun 2002, Kenneth D. Merry wrote: I'm planning on checking in the zero copy sockets code Tuesday evening, MDT. If there are any concerns, I'm more than willing to delay it. Out of curiousity, what happens when the page being write()n is a mmap'd page shared by multiple processes? Will the page be shared? That could be a big reduction in mbuf cluster usage on some http/ftp systems, I'd guess. The page would be shared, until one of the processes decides to write to it while it is still referenced in the kernel. If that happens, it'll get copied. Ken Cool, thttpd / others should benefit greatly then. Mike Silby Silbersack To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-current in the body of the message
Re: zero copy code checkin in 2 days, new snapshot
Mike Silbersack wrote: On Mon, 24 Jun 2002, Kenneth D. Merry wrote: On Mon, Jun 24, 2002 at 01:17:03 -0500, Mike Silbersack wrote: On Sun, 23 Jun 2002, Kenneth D. Merry wrote: I'm planning on checking in the zero copy sockets code Tuesday evening, MDT. If there are any concerns, I'm more than willing to delay it. Out of curiousity, what happens when the page being write()n is a mmap'd page shared by multiple processes? Will the page be shared? That could be a big reduction in mbuf cluster usage on some http/ftp systems, I'd guess. The page would be shared, until one of the processes decides to write to it while it is still referenced in the kernel. If that happens, it'll get copied. Ken Cool, thttpd / others should benefit greatly then. The last time I checked thttpd didn't even use sendfile(2). It does use accf_http(9). Maybe kqueue(2) could speed it up further. -- Andre To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-current in the body of the message
Re: zero copy code checkin in 2 days, new snapshot
On Mon, 24 Jun 2002, Andre Oppermann wrote: Mike Silbersack wrote: Cool, thttpd / others should benefit greatly then. The last time I checked thttpd didn't even use sendfile(2). It does use accf_http(9). Maybe kqueue(2) could speed it up further. -- Andre I thought that thttpd used kqueue (as of recent versions), and write()s from mmap'd files. I could be wrong, of course. (The program seems to evolve relatively quickly.) Mike Silby Silbersack To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-current in the body of the message
Re: zero copy code checkin in 2 days, new snapshot
* Mike Silbersack [EMAIL PROTECTED] [020624 10:24] wrote: On Mon, 24 Jun 2002, Andre Oppermann wrote: Mike Silbersack wrote: Cool, thttpd / others should benefit greatly then. The last time I checked thttpd didn't even use sendfile(2). It does use accf_http(9). Maybe kqueue(2) could speed it up further. -- Andre I thought that thttpd used kqueue (as of recent versions), and write()s from mmap'd files. I could be wrong, of course. (The program seems to evolve relatively quickly.) I submitted some patches to use sendfile(2) that weren't accepted for some reason. It's not too hard, you just have to adjust the code not to close(2) the descriptors and make the mmap() function a stub type thing. really out of date... http://people.freebsd.org/~alfred/thttpd/thttpd-sendfile-acceptfilter.diff -- -Alfred Perlstein [[EMAIL PROTECTED]] 'Instead of asking why a piece of software is using 1970s technology, start asking why software is ignoring 30 years of accumulated wisdom.' Tax deductible donations for FreeBSD: http://www.freebsdfoundation.org/ To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-current in the body of the message
Re: zero copy code checkin in 2 days, new snapshot
On Mon, Jun 24, 2002 at 10:33:05AM -0700, Alfred Perlstein wrote: I submitted some patches to use sendfile(2) that weren't accepted for some reason. It's not too hard, you just have to adjust the code not to close(2) the descriptors and make the mmap() function a stub type thing. really out of date... http://people.freebsd.org/~alfred/thttpd/thttpd-sendfile-acceptfilter.diff Why don't you add them as patches to the port? To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-current in the body of the message
Re: zero copy code checkin in 2 days, new snapshot
On 2002-06-24 12:56 +, David O'Brien wrote: On Mon, Jun 24, 2002 at 10:33:05AM -0700, Alfred Perlstein wrote: I submitted some patches to use sendfile(2) that weren't accepted for some reason. It's not too hard, you just have to adjust the code not to close(2) the descriptors and make the mmap() function a stub type thing. really out of date... http://people.freebsd.org/~alfred/thttpd/thttpd-sendfile-acceptfilter.diff Why don't you add them as patches to the port? Because he isn't prepared to maintain an external patch for an ever changing part of the vendor code? I don't blame him or anyone else much, if that's why... To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-current in the body of the message
Re: zero copy code checkin in 2 days, new snapshot
On Sun, 23 Jun 2002, Kenneth D. Merry wrote: I'm planning on checking in the zero copy sockets code Tuesday evening, MDT. If there are any concerns, I'm more than willing to delay it. Out of curiousity, what happens when the page being write()n is a mmap'd page shared by multiple processes? Will the page be shared? That could be a big reduction in mbuf cluster usage on some http/ftp systems, I'd guess. Mike Silby Silbersack To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-current in the body of the message
