XWin too slow to start

[Larry Hall (Cygwin X)]

Stephen More wrote:
> On 8/13/07, Larry Hall (Cygwin X) <reply-to-list-only-lh-x <AT> cygwin <DOT> com> wrote:
                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
<http://cygwin.com/acronyms/#PCYMTNQREAIYR>.  Thanks.


>> Stephen More wrote:
>>> What is causing XWin to startup so slow ?
>>
>> Good question.  What did you change recently?
> 
> Like all users would say....I did not change a thing.
> ( Could it have been an automatic update for XP ? )
> I even re-installed cygwin from scratch to debug this issue.


As I mentioned, the X stuff hasn't changed in years (as there is no
maintainer - you want to be it?) so I would expect much help here.
As for whether the auto update of XP could have an effect, the answer
is of course!



> 
>> My WAG is that you've changed some network/firewall settings that are
>> slowing down the X server startup.
> 
> What type of network traffic is the X server trying ? Is it trying to
> do DNS lookups ? Is it trying to connect to a website ?


X uses TCP by default for it's connections.  6000 is the common default
port.  You can change and/or disable that of course if you want (see
the X server documentation).


> After a "strace -o /tmp/strace XWin"  followed by sort -n /tmp/strace
> I see 2 large pauses:
> 
>    21   20702 [sig] XWin 972 wait_sig: signalling pack.wakeup 0x6E8
>    43   20745 [main] XWin 972 sig_send: returning 0x0 from sending signal -34
>    44   20789 [main] XWin 972 writev: writev (3, 0x22C780, 1)
>    32   20821 [main] XWin 972 fhandler_base::write: binary write
>    34   20855 [main] XWin 972 writev: 34 = write (3, 0x22C780, 1), errno 2
> 20775776 20796631 [main] XWin 972 sig_send: sendsig 0x6E4, pid 972,
> signal -34, its_me 1
>    57 20796688 [main] XWin 972 sig_send: wakeup 0x6D8
>   108 20796796 [main] XWin 972 sig_send: Waiting for pack.wakeup 0x6D8
>    28 20796824 [sig] XWin 972 wait_sig: signalling pack.wakeup 0x6D8
> 
> 
> 29     235 [main] XWin 2844 set_myself: myself->dwProcessId 2844
>    58     293 [main] XWin 2844 child_copy: dll data - hp 0x5AC low
> 0x61100000, high 0x61104BA0, res 1
> 24014688 24014981 [main] XWin 2844 child_copy: dll bss - hp 0x5AC low
> 0x6113F000, high 0x611483D0, res 1
>   272 24015253 [main] XWin 2844 child_copy: user heap - hp 0x5AC low
> 0x100F0000, high 0x10130000, res 1
>    28 24015281 [main] XWin 2844 child_copy: done
>   574 24015855 [main] XWin 2844 child_copy: data - hp 0x5AC low
> 0x733000, high 0x77EDD0, res 1
>   298 24016153 [main] XWin 2844 child_copy: bss - hp 0x5AC low
> 0x7D9000, high 0x80B3F0, res 1
>    29 24016182 [main] XWin 2844 child_copy: done
> 
> 
> Does this info help at all ?


Not really no.  However, if you had not changed any Cygwin piece prior to
noticing the problem, I think it's safe to assume that the delay is
introduced by some external change, which is why I mentioned network and
firewall possibilities.  Depending on your source for A/V software, this
is a possible culprit too.


-- 
Larry Hall                              http://www.rfk.com
RFK Partners, Inc.                      (508) 893-9779 - RFK Office
216 Dalton Rd.                          (508) 429-6305 - FAX
Holliston, MA 01746

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