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From: Magnus Holmgren <magnushol@gmail.com>
Subject: Re: Cygwin slow on x64 systems
Date: Tue, 31 Aug 2010 17:26:24 +0000 (UTC)
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References: <4C7CA209.60603@onevision.de> <20100831140842.GA11833@ednor.casa.cgf.cx>
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Christopher Faylor <cgf-use-the-mailinglist-please <at> cygwin.com> writes:

> Here's what I'm saying:  It makes absolutely no sense that moving the
> call would have any effect.  The code is the way it is for a reason
> so we're not going to just revert the change.

I think it makes sense, if the signal thread initialization takes time.
Which it does:

   69   15954 [main] date 2708 wait_for_sigthread: wait_sig_inited 0x4C
13706   29660 [main] date 2708 wait_for_sigthread: process/signal handling
                               enabled, state 0x41
  146   29806 [sig] date 2708 wait_sig: entering ReadFile loop, my_readsig 0xFC,
                              my_sendsig 0x100

The above is a snippet from "strace date" (with some wrapping by me), using
Cygwin 1.7.6 on Vista x64. And 1.7.7 is said to be slower still - and guess
what, sigproc_init is called later; see r1.382 of dcrt0.cc.

  Magnus



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