Date: Fri, 13 Jan 2017 10:44:27 -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: <4229440.M2aXL9uEHZ@ralph.baldwin.cx> In-Reply-To: <54232.193.12.143.142.1484297881.squirrel@webmail.alvermark.net> References: <57236.193.12.143.142.1484240708.squirrel@webmail.alvermark.net> <1610370.k87iRho0oa@ralph.baldwin.cx> <54232.193.12.143.142.1484297881.squirrel@webmail.alvermark.net>
next in thread | previous in thread | raw e-mail | index | archive | help
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. -- John Baldwin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4229440.M2aXL9uEHZ>