* Slow cygwin executable start up
@ 2022-04-30 14:06 Cary Lewis
2022-05-01 12:40 ` Brian Inglis
0 siblings, 1 reply; 2+ messages in thread
From: Cary Lewis @ 2022-04-30 14:06 UTC (permalink / raw)
To: cygwin
I am experiencing a problem with Cygwin on my Dell 7590.
There is a multi-second delay when starting a cygwin program from a mintty
window, but only the first time that a program is run.
E.g. if run openssl version, then sometimes there is a delay before
anything is outputted.
If I run the command again, there is no delay.
I ran a test with strace, and I believe the delay occurs during the initial
loading of the cygwin dlls:
--- Process 6232 created
--- Process 6232 loaded C:\Windows\System32\ntdll.dll at 00007ffe3b4c0000
--- Process 6232 loaded C:\Windows\System32\kernel32.dll at 00007ffe3a660000
--- Process 6232 loaded C:\Windows\System32\KernelBase.dll at
00007ffe38c60000
--- Process 6232 thread 24052 created
--- Process 6232 thread 28400 created
--- Process 6232 thread 2788 created
--- Process 6232 loaded C:\cygwin64\bin\cygssl-1.1.dll at 00000003f7a60000
--- Process 6232 loaded C:\cygwin64\bin\cygcrypto-1.1.dll at
00000003fa540000
--- Process 6232 loaded C:\cygwin64\bin\cygwin1.dll at 0000000180040000
--- Process 6232 loaded C:\cygwin64\bin\cygz.dll at 00000003f7320000
--- Process 6232 loaded C:\cygwin64\bin\cygwin1.dll at 0000000000da0000
Can anyone suggest why this is happening?
The version of cygwin is:
$ uname -r
3.2.0(0.340/5/3)
By the way, I don't see this on my older PC, it's version of cygwin is:
3.1.7(0.340/5/3)
I don't really want to upgrade my older PC to the latest cygwin to test if
the 3.2 version is the culprit or not.
I also upgraded from windows 10 to windows 11 on the PC experiencing the
slow start issue, and that didn't have any effect on the problem.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Slow cygwin executable start up
2022-04-30 14:06 Slow cygwin executable start up Cary Lewis
@ 2022-05-01 12:40 ` Brian Inglis
0 siblings, 0 replies; 2+ messages in thread
From: Brian Inglis @ 2022-05-01 12:40 UTC (permalink / raw)
To: cygwin
On 2022-04-30 08:06, Cary Lewis wrote:
> I am experiencing a problem with Cygwin on my Dell 7590.
>
> There is a multi-second delay when starting a cygwin program from a mintty
> window, but only the first time that a program is run.
>
> E.g. if run openssl version, then sometimes there is a delay before
> anything is outputted.
>
> If I run the command again, there is no delay.
>
> I ran a test with strace, and I believe the delay occurs during the initial
> loading of the cygwin dlls:
>
> --- Process 6232 created
> --- Process 6232 loaded C:\Windows\System32\ntdll.dll at 00007ffe3b4c0000
> --- Process 6232 loaded C:\Windows\System32\kernel32.dll at 00007ffe3a660000
> --- Process 6232 loaded C:\Windows\System32\KernelBase.dll at
> 00007ffe38c60000
> --- Process 6232 thread 24052 created
> --- Process 6232 thread 28400 created
> --- Process 6232 thread 2788 created
> --- Process 6232 loaded C:\cygwin64\bin\cygssl-1.1.dll at 00000003f7a60000
> --- Process 6232 loaded C:\cygwin64\bin\cygcrypto-1.1.dll at
> 00000003fa540000
> --- Process 6232 loaded C:\cygwin64\bin\cygwin1.dll at 0000000180040000
> --- Process 6232 loaded C:\cygwin64\bin\cygz.dll at 00000003f7320000
> --- Process 6232 loaded C:\cygwin64\bin\cygwin1.dll at 0000000000da0000
>
> Can anyone suggest why this is happening?
Check the time stamp deltas between strace outputs for large gaps,
especially look for and around open_shared, user_info, and
initialization, e.g.
$ less '+/open_shared|user_info|initialization' ../pcmanfm.strace
and post them here or attach the complete strace startup output for
diagnosis.
> The version of cygwin is:
>
> $ uname -r
> 3.2.0(0.340/5/3)
>
> By the way, I don't see this on my older PC, it's version of cygwin is:
> 3.1.7(0.340/5/3)
>
> I don't really want to upgrade my older PC to the latest cygwin to test if
> the 3.2 version is the culprit or not.
>
> I also upgraded from windows 10 to windows 11 on the PC experiencing the
> slow start issue, and that didn't have any effect on the problem.
Search the FAQ for slow e.g.
https://cygwin.com/faq/faq.html#faq.using.startup-slow
This sounds like large initial AD entries load delays, and/or slow
remote DC replies and/or network connection, covered in the list a few
years ago.
The recommended solution is setting up cygserver with appropriate
parameter settings to cache your AD entries across processes.
--
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada
This email may be disturbing to some readers as it contains
too much technical detail. Reader discretion is advised.
[Data in binary units and prefixes, physical quantities in SI.]
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