Mail Archives: cygwin-developers/1998/09/16/10:15:06
On Wed, Sep 16, 1998 at 02:17:50PM +0400, Sergey Okhapkin wrote:
>Sergey Okhapkin wrote:
>> 1. Configure scripts runs much slower with a new dll! For example,
>configure of bash-2.02 takes 2m15s with the old dll and 2m57s with the new
>one.
>>
>
>Disabling new read code in syscalls.cc and passing all read requests thru
>read_handler instead of creating new thred fixes performance problem (2m06s
>with a new dll). Configure scripts intensively uses pipes, but bash reads
>pipes one byte per read request.
Thanks for narrowing this down. Does this, by any chance, also rectify
the problem? I left a debugging setting in _read.
Index: syscalls.cc
===================================================================
RCS file: /cvs/cvsfiles/devo/winsup/syscalls.cc,v
retrieving revision 1.109
diff -u -p -r1.109 syscalls.cc
--- syscalls.cc 1998/09/14 01:44:11 1.109
+++ syscalls.cc 1998/09/16 16:55:04
@@ -276,7 +277,7 @@ _read (int fd, void *ptr, size_t len)
if (r->res < 0)
set_errno (r->newerrno);
else if (r->res == 0 &&
- ((res = WaitForMultipleObjects (1, w4 + 1, FALSE, 100))
+ ((res = WaitForMultipleObjects (1, w4 + 1, FALSE, 0))
== WAIT_OBJECT_0))
{
syscall_printf ("res 0, but signalled");
--
cgf AT cygnus DOT com
http://www.cygnus.com/
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