Re: r311568 makes freerdp very slow

From: Jakob Alvermark <jakob_at_alvermark.net>
Date: Tue, 17 Jan 2017 13:46:31 +0100 (CET)
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?

Thanks,
Jakob
Received on Tue Jan 17 2017 - 12:11:27 UTC

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