Date: Wed, 18 Jan 2017 10:29:44 -0800 From: John Baldwin <jhb@freebsd.org> To: Jakob Alvermark <jakob@alvermark.net> Cc: freebsd-current@freebsd.org, Shawn Webb <shawn.webb@hardenedbsd.org> Subject: Re: r311568 makes freerdp very slow Message-ID: <3516356.ILt4XdM4E4@ralph.baldwin.cx> In-Reply-To: <59599.193.12.143.142.1484657191.squirrel@webmail.alvermark.net> References: <57236.193.12.143.142.1484240708.squirrel@webmail.alvermark.net> <64999.85.229.93.187.1484344018.squirrel@webmail.alvermark.net> <59599.193.12.143.142.1484657191.squirrel@webmail.alvermark.net>
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On Tuesday, January 17, 2017 01:46:31 PM Jakob Alvermark wrote: > On Fri, January 13, 2017 22:46, Jakob Alvermark wrote: > > On Fri, January 13, 2017 19:44, John Baldwin wrote: > > > >> On Friday, January 13, 2017 09:58:01 AM Jakob Alvermark wrote: > >> > >> > >>> On Thu, January 12, 2017 19:26, John Baldwin wrote: > >>> > >>> > >>>> On Thursday, January 12, 2017 12:42:11 PM Shawn Webb wrote: > >>>> > >>>> > >>>> > >>>>> On Thu, Jan 12, 2017 at 06:05:08PM +0100, Jakob Alvermark wrote: > >>>>> > >>>>> > >>>>> > >>>>>> Hi, > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> r311568 Set MORETOCOME for AIO write requests on a socket. > >>>>>> > >>>>>> After this commit freerdp is very slow. > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> Before the password prompt would appear immediately when > >>>>>> connecting to a server. Now it takes 5-10 seconds. After > >>>>>> entering the password, another 5-10 seconds until I am > >>>>>> connected. Once connected, there is a considerable lag. > >>>>>> > >>>>>> > >>>>>> What could be the problem? > >>>>>> > >>>>>> > >>>>>> > >>>>> > >>>>> I don't know what the problem is, but I am seeing the same > >>>>> symptom. > >>>>> > >>>>> > >>>> > >>>> Can you get a ktrace of the freerdp process during this? The > >>>> commit should only be setting MORETOCOME if multiple aio_write > >>>> requests are queued to the same socket (so that TCP can batch them > >>>> into a single packet). However, it should not affect an application > >>>> just calling aio_write() on a socket once. > >>>> > >>>> -- > >>>> John Baldwin > >>>> > >>>> > >>> > >>> Hi John, > >>> > >>> > >>> > >>> I got the ktrace, what do I do with it? > >>> > >>> > >> > >> kdump will generate a text representation, perhaps using 'kdump -s' to > >> not include dumps of raw I/O data. If you can put the output of kdump > >> at a URL I can fetch from then I can look at it. > >> > > > > OK, here it is: http://filebin.ca/38mkuLau9Yqu/ktrace.out.xfreerdp.txt > > > > > > Thanks, > > > > > > Jakob > > Hi, > > Did you get any chance to look at this? I have not yet, but can you please try the fix in r312387? -- John Baldwin
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