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Re: Cygwin process activation very slow
- From: Marco Atzeri <marco dot atzeri at gmail dot com>
- To: cygwin at cygwin dot com
- Date: Fri, 29 Apr 2016 07:23:07 +0200
- Subject: Re: Cygwin process activation very slow
- Authentication-results: sourceware.org; auth=none
- References: <22306 dot 47968 dot 377196 dot 214744 at pcls8 dot std dot com>
On 29/04/2016 03:39, firstname.lastname@example.org wrote:
15-30 seconds to do even an ls of a small directory, seems to be
I've spent several days on this. Cygcheck output below but W7 pro,
4GB, personal laptop, not a new CPU but otherwise seems ok and the
disk is a 480GB Sandisk SSD, fairly vanilla set-up no fancy LDAP or AD
etc, wireless net. Recently updated cygwin trying to fix this, uname
CYGWIN_NT-6.1 xyzzy 2.5.1(0.297/5/3) 2016-04-21 22:14 x86_64 Cygwin
There's basically no load on this machine, under 10% CPU according to
taskmgr, 80% memory but mostly that's chrome (browser.) Closing chrome
etc makes no difference. Killed off the few antivirus procs I could (I
think killing MS's security stuff takes heroics), no
difference. Killed off most everything not critical, no change.
which antivirus ?
An attempt at a reinstall or earlier a rebase_all runs for days,
literally, multiple days.
My best guess is this started after a Windows Update. I did a bunch of
them and then this started.
An strace of an ls gives me this in part (emphasis added):
259 3733 [main] ls 2000 user_info::create: user shared version AB1FCCE8
140 3873 [main] ls 2000 fhandler_pipe::create: name \\.\pipe\cygwin-e022582
115c10879-2000-sigwait, size 11440, mode PIPE_TYPE_MESSAGE
***** interesting two lines
16945 20818 [main] ls 2000 fhandler_pipe::create: pipe read handle 0x80
57 20875 [main] ls 2000 fhandler_pipe::create: CreateFile: name \\.\pipe\cygwin-e022582115c10879-2000-sigwait
***** end interesting two lines
65 20940 [main] ls 2000 fhandler_pipe::create: pipe write handle 0x84
41 20981 [main] ls 2000 dll_crt0_0: finished dll_crt0_0 initialization
--- Process 2000 thread 2864 created
That means the fhandler_pipe::create took about 17 seconds (16,945ms),
right? That would be consistent with what I'm seeing.
My guess is that it looks like it's trying to create a named pipe on a
share (see next line, CreateFile) and for some reason that's going
into a network timeout? Or slow for some reason.
Is not a share, the name is as expected for a pipe.
Usually the timing is in 100-200 range.
PS: as general rule "cygcheck.out" must be an added as attachement.
not in line in the mail.
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