Date: Fri, 13 Jan 2017 22:46:58 +0100 (CET) From: "Jakob Alvermark" <jakob@alvermark.net> To: "John Baldwin" <jhb@freebsd.org> Cc: "Jakob Alvermark" <jakob@alvermark.net>, freebsd-current@freebsd.org, "Shawn Webb" <shawn.webb@hardenedbsd.org> Subject: Re: r311568 makes freerdp very slow Message-ID: <64999.85.229.93.187.1484344018.squirrel@webmail.alvermark.net> In-Reply-To: <4229440.M2aXL9uEHZ@ralph.baldwin.cx> 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> <4229440.M2aXL9uEHZ@ralph.baldwin.cx>
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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
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