Mail Archives: cygwin/1999/03/09/02:02:58
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I had used B17-19 with no problems for months, Then before I installed =
PM3 Modula-3,
I updated to B20.0. PM3 Modula-3 (http://polymtl.ca/m3) installed and =
ran successfully,
then updated to B20.1. PM3 Modula-3 and Cygwin appeared to work fine. =
Then I tried
to compile a large Modula-3 package, and after compiling part-way =
through the
system, my computer hung in an infinite loop, steadily allocating about =
50-60K of
memory per second, with 100% CPU utilization, and no significant disk =
activity. At first
I thought this was a Modula-3 problem, but gradually started to suspect =
it was a timing
problem in the Cygwin library. I noticed that the hang occurred after =
approximately the
same amount of elapsed time compiling, and not on the same source file, =
and with
exactly the same behaviour while several different programs were active, =
i.e. M3cgc1 (the Modula
3 compiler), as (the GNU assembler - called by the compiler), and even =
once in "rm" (the Cygwin
rm program.)
So, I decided to rebuild from scratch the Modula-3 compiler. This failed =
in exactly the
same way, with a hang, not always on the same source file, but after =
roughly the
same amount of elapsed time well into a (very complex) build process. I =
then
uninstalled B20.1, and I went to fetch B20.0, but it was gone from the =
ftp sites.
(I guess the "serious bug" fixed in 20.1 caused its withdrawal.) So I =
fetched and
installed B19.1 Now, Modula-3 installed and ran correctly, and all the =
systems
that failed to compile under B20.1, compiled correctly.=20
Unfortunately, I can't boil this down to a simple isolated case: its not =
a specific
program that hangs, but an arbitrary program, and that program is =
spawned by
a (make-like) shell (m3build) executing a complex build operation. To =
reproduce
the problem you have to install PM3 Modula-3. And in order to do that =
you need
LOTS of disk space (about 400 MB) and you need a patch (at least for the
PM3 1.1.10 version - this may be fixed in the PM3 1.1.11 release - =
please
contact michel DOT dagenais AT polymtl DOT ca . I can say that PM3 Modula-3 is =
very
reliable very portable software that installs and works on dozens of =
machines and
flavours of UNIX, and I hope the Cygnus developers will look into this =
problem relatively
quickly!
I have a Windows NT 4.0 system, service pack 4, on a 128MB AMD K6-266 =
machine,
I run the NTFS file system, with compression turned on.
Parzival
=20
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<META content=3Dtext/html;charset=3Diso-8859-1 =
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<DIV><FONT color=3D#000000 face=3DArial size=3D2>I had used B17-19 with =
no problems=20
for months, Then before I installed PM3 Modula-3,</FONT></DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2>I updated to B20.0. PM3 =
Modula-3 (<A=20
href=3D"http://polymtl.ca/m3">http://polymtl.ca/m3</A>) installed and =
ran=20
successfully,</FONT></DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2>then updated to B20.1. =
PM3 Modula-3=20
and Cygwin appeared to work fine. Then I tried</FONT></DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2>to compile a large =
Modula-3 package,=20
and after compiling part-way through the</FONT></DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2>system, my computer =
hung in an=20
infinite loop, steadily allocating about 50-60K of</FONT></DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2>memory per second, with =
100% CPU=20
utilization, and no significant disk activity. At first</FONT></DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2></FONT><FONT =
face=3DArial size=3D2>I=20
thought this was a Modula-3 problem, but gradually started to suspect it =
was a=20
timing</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>problem in the Cygwin library. I =
noticed that the=20
hang occurred after approximately the</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>same amount of elapsed time compiling, =
and not on=20
the same source file, and with</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>exactly the same behaviour while =
several different=20
programs were active, i.e. M3cgc1 (the Modula</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>3 compiler), as (the GNU assembler - =
called by the=20
compiler), and even once in "rm" (the Cygwin</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>rm program.)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>So, I decided to rebuild from scratch =
the Modula-3=20
compiler. This failed in exactly the</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>same way, with a hang, not always on =
the same=20
source file, but after roughly the</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>same amount of elapsed time well into a =
(very=20
complex) build process. I then</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>uninstalled B20.1, and I went to fetch =
B20.0, but=20
it was gone from the ftp sites.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>(I guess the "serious =
bug" fixed in=20
20.1 caused its withdrawal.) So I fetched and</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>installed B19.1 Now, Modula-3 installed =
and ran=20
correctly, and all the systems</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>that failed to compile under B20.1, =
compiled=20
correctly. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Unfortunately, I can't boil this down =
to a simple=20
isolated case: its not a specific</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>program that hangs, but an arbitrary =
program, and=20
that program is spawned by</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>a (make-like) shell (m3build) executing =
a complex=20
build operation. To reproduce</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>the problem you have to install PM3 =
Modula-3. And=20
in order to do that you need</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>LOTS of disk space (about 400 MB) and =
you need a=20
patch (at least for the</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>PM3 1.1.10 version - this may be fixed =
in the PM3=20
1.1.11 release - please</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>contact <A=20
href=3D"mailto:michel DOT dagenais AT polymtl DOT ca">michel DOT dagenais AT polymtl DOT ca</A>=
.=20
I can say that PM3 Modula-3 is very</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>reliable very portable software that =
installs and=20
works on dozens of machines and</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>flavours of UNIX, and I hope the Cygnus =
developers=20
will look into this problem relatively</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>quickly!</FONT></DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2>
<DIV><FONT color=3D#000000 face=3DArial size=3D2>I have a Windows NT 4.0 =
system,=20
service pack 4, on a 128MB AMD K6-266 machine,</FONT></DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2></FONT><FONT =
face=3DArial size=3D2>I run=20
the NTFS file system, with compression turned on.</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>Parzival</DIV>
<DIV><FONT face=3DArial =
size=3D2></FONT> </DIV></FONT></DIV></BODY></HTML>
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