Very slow start of cygwin-3.0.0-1 (32-bit)

Very slow start of cygwin-3.0.0-1 (32-bit)

[cygwin]

Hello everyone,

I am using Cygwin (32-bit) on 64-bit Windows 10 computer. This computer is member of a big AD domain. My account is member of a lot of AD groups.

In my configuration there are no /etc/passwd and /etc/group files. The /etc/nsswitch.conf file is empty. I don't use cygserver.

I just updated from cygwin-2.11.2-1 to cygwin-3.0.0-1 without changing something else on my computer configuration.

With cygwin-2.11.2-1 the startup of a terminal window was fast (about 1 second). With cygwin-3.0.0-1 it takes about 5 minutes.

Is this something new and the expected behavior with cygwin-3.0.0-1?

Thanks and kind regards,
René



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Re: Very slow start of cygwin-3.0.0-1 (32-bit)

[Achim Gratz]

cygwin@roche.com writes:
> I am using Cygwin (32-bit) on 64-bit Windows 10 computer. This
>computer is member of a big AD domain. My account is member of a lot of
>AD groups.

I think I'm seeing the same problem as you.  If you start the shell from
"strace -w" you can see how long each call to the DC takes and my guess
is that will account for the difference in startup time.


Regards,
Achim.
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Re: Very slow start of cygwin-3.0.0-1 (32-bit)

[Corinna Vinschen]

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On Feb 21 20:39, Achim Gratz wrote:
> cygwin@roche.com writes:
> > I am using Cygwin (32-bit) on 64-bit Windows 10 computer. This
> >computer is member of a big AD domain. My account is member of a lot of
> >AD groups.
> 
> I think I'm seeing the same problem as you.  If you start the shell from
> "strace -w" you can see how long each call to the DC takes and my guess
> is that will account for the difference in startup time.

What Achim is missing to tell here is that he bisected Cygwin with git
and found the culprit.  It's a fairly simple patch and *could* be
reverted, but I think there's a better compromise.  Stay tuned.

Thanks Achim!


Corinna

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Corinna Vinschen
Cygwin Maintainer

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Re: Very slow start of cygwin-3.0.0-1 (32-bit)

[Thomas Wolff]

On 19.02.2019 14:06, cygwin@roche.com wrote:
> Hello everyone,
>
> I am using Cygwin (32-bit) on 64-bit Windows 10 computer. This computer is member of a big AD domain. My account is member of a lot of AD groups.
>
> In my configuration there are no /etc/passwd and /etc/group files. The /etc/nsswitch.conf file is empty. I don't use cygserver.
>
> I just updated from cygwin-2.11.2-1 to cygwin-3.0.0-1 without changing something else on my computer configuration.
>
> With cygwin-2.11.2-1 the startup of a terminal window was fast (about 1 second). With cygwin-3.0.0-1 it takes about 5 minutes.
Not sure whether it's the same. Same situation in /etc, Windows 7 
Professional, Windows and Cygwin 64 bit.
Test from Windows cmd `time < nul & uname -a & time < nul`
takes 11-12s with 3.0.1 but 20-30ms with 2.11.2
Thomas

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Re: Very slow start of cygwin-3.0.0-1 (32-bit)

[Corinna Vinschen]

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On Feb 27 13:37, Thomas Wolff wrote:
> On 19.02.2019 14:06, cygwin@roche.com wrote:
> > Hello everyone,
> > 
> > I am using Cygwin (32-bit) on 64-bit Windows 10 computer. This computer is member of a big AD domain. My account is member of a lot of AD groups.
> > 
> > In my configuration there are no /etc/passwd and /etc/group files. The /etc/nsswitch.conf file is empty. I don't use cygserver.
> > 
> > I just updated from cygwin-2.11.2-1 to cygwin-3.0.0-1 without changing something else on my computer configuration.
> > 
> > With cygwin-2.11.2-1 the startup of a terminal window was fast (about 1 second). With cygwin-3.0.0-1 it takes about 5 minutes.
> Not sure whether it's the same. Same situation in /etc, Windows 7
> Professional, Windows and Cygwin 64 bit.
> Test from Windows cmd `time < nul & uname -a & time < nul`
> takes 11-12s with 3.0.1 but 20-30ms with 2.11.2

Test the latest snapshot from https://cygwin.com/snapshots/, please.


Corinna

-- 
Corinna Vinschen
Cygwin Maintainer

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Re: Very slow start of cygwin-3.0.0-1 (32-bit)

[Thomas Wolff]

On 27.02.2019 13:54, Corinna Vinschen wrote:
> On Feb 27 13:37, Thomas Wolff wrote:
>> On 19.02.2019 14:06, cygwin@roche.com wrote:
>>> Hello everyone,
>>>
>>> I am using Cygwin (32-bit) on 64-bit Windows 10 computer. This computer is member of a big AD domain. My account is member of a lot of AD groups.
>>>
>>> In my configuration there are no /etc/passwd and /etc/group files. The /etc/nsswitch.conf file is empty. I don't use cygserver.
>>>
>>> I just updated from cygwin-2.11.2-1 to cygwin-3.0.0-1 without changing something else on my computer configuration.
>>>
>>> With cygwin-2.11.2-1 the startup of a terminal window was fast (about 1 second). With cygwin-3.0.0-1 it takes about 5 minutes.
>> Not sure whether it's the same. Same situation in /etc, Windows 7
>> Professional, Windows and Cygwin 64 bit.
>> Test from Windows cmd `time < nul & uname -a & time < nul`
>> takes 11-12s with 3.0.1 but 20-30ms with 2.11.2
> Test the latest snapshot from https://cygwin.com/snapshots/, please.
Fixed, thank you.

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Re: Very slow start of cygwin-3.0.0-1 (32-bit)

[Corinna Vinschen]

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On Feb 27 14:03, Thomas Wolff wrote:
> On 27.02.2019 13:54, Corinna Vinschen wrote:
> > On Feb 27 13:37, Thomas Wolff wrote:
> > > On 19.02.2019 14:06, cygwin@roche.com wrote:
> > > > Hello everyone,
> > > > 
> > > > I am using Cygwin (32-bit) on 64-bit Windows 10 computer. This computer is member of a big AD domain. My account is member of a lot of AD groups.
> > > > 
> > > > In my configuration there are no /etc/passwd and /etc/group files. The /etc/nsswitch.conf file is empty. I don't use cygserver.
> > > > 
> > > > I just updated from cygwin-2.11.2-1 to cygwin-3.0.0-1 without changing something else on my computer configuration.
> > > > 
> > > > With cygwin-2.11.2-1 the startup of a terminal window was fast (about 1 second). With cygwin-3.0.0-1 it takes about 5 minutes.
> > > Not sure whether it's the same. Same situation in /etc, Windows 7
> > > Professional, Windows and Cygwin 64 bit.
> > > Test from Windows cmd `time < nul & uname -a & time < nul`
> > > takes 11-12s with 3.0.1 but 20-30ms with 2.11.2
> > Test the latest snapshot from https://cygwin.com/snapshots/, please.
> Fixed, thank you.

Thanks for testing!


Corinna

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Corinna Vinschen
Cygwin Maintainer

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Re: Very slow start of cygwin-3.0.0-1 (32-bit)

[Achim Gratz]

Corinna Vinschen writes:
>> > Test the latest snapshot from https://cygwin.com/snapshots/, please.
>> Fixed, thank you.

I can confirm that this problem is solved.


Regards,
Achim.
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