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Date: Mon, 17 Aug 2015 22:55:17 +0200
From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: commands spends time in cygheap_user
Message-ID: <20150817205517.GI17917@calimero.vinschen.de>
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References: <20150810160150.GD13029@calimero.vinschen.de> <1439380764318-120458.post@n5.nabble.com> <20150812144754.GJ13029@calimero.vinschen.de> <1439560143628-120519.post@n5.nabble.com> <20150814154832.GK28349@calimero.vinschen.de> <20150814202007.GM28349@calimero.vinschen.de> <20150815115429.GS28349@calimero.vinschen.de> <1439728500518-120553.post@n5.nabble.com> <20150817080703.GC25127@calimero.vinschen.de> <20150817081337.GF25127@calimero.vinschen.de>
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On Aug 17 10:13, Corinna Vinschen wrote:
> On Aug 17 10:07, Corinna Vinschen wrote:
> > On Aug 16 05:35, mku wrote:
> > > I changed cygwin1.dll to Version 2.2.1 and got the results shown in t=
he
> > > attached log file (
> > > cygwin-time-lag.txt
> > > <http://cygwin.1069669.n5.nabble.com/file/n120553/cygwin-time-lag.txt=
>  ).
> > > I'm sorry to say that the problem has not disappeared with that patch.
> >=20
> >=20
> > Too bad, I thought skipping the SID<->uid mapping per RFC 2307 is the
> > culprit.
>=20
> s/is the culprit/fixes the problem.
>=20
> >=20
> > Are you sure your /etc/nsswitch.conf is set to
> >=20
> >   passwd: files
> >   group: files
> >=20
> > Can you print it out, please?
> >=20
> > I'll try to reproduce this again in the next few days.

I managed to reproduce the issue and I think I found the actual problem
here.  When trying to create the supplementary group list of the current
user, Cygwin called LookupAccountSids indiscriminately.  If you don't
have access to your AD, this call is bound to take some time, 5 to 10
secs in my testing.

I changed the code so that when "group: db" is set in /etc/nsswitch.conf
it will only utilize /etc/group to fetch group information.

I uploaded a new developer snapshot containing this patch to
https://cygwin.com/snapshots/  Please give it a try.  For testing, just
replace your current DLL with the snapshot DLL temporarily.


Thanks,
Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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