Re: Cygwin process activation very slow

[Marco Atzeri <marco.atzeri@gmail.com>]

On 29/04/2016 03:39, bzs@theworld.com wrote:
>
> 15-30 seconds to do even an ls of a small directory, seems to be
> process activation.
>
> 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
> -a says:
>
>   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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