[gambit-list] SMP Gambit

Bradley Lucier lucier at math.purdue.edu
Sun Jan 29 12:32:41 EST 2017


On 01/29/2017 11:18 AM, Marc Feeley wrote:
> OK… on the smaller machine (which actually has 24 processors), after *many* “make ut” I finally see a deadlock of some sort, so I will investigate.  It seems to coincide with starting to do something else on the machine (like typing in emacs) but not consistently.  It takes several hundred “make ut” to get a deadlock.  The CPUs are “Intel(R) Xeon(R) X5650  @ 2.67GHz”.
>
> Can you reproduce the issue more consistently on your machine?  Does it happen every second or so “make ut”?

I updated and rebooted my linux box at work (so nothing else was 
running) and made Gambit with your new instructions.  Ran make ut a 
dozen or so times and got nothing.

But after I started an emacs window it hung with


LD_LIBRARY_PATH=../lib:../gsi:../gsc:/usr/local/libimobiledevice/lib:/usr/local/Gambit/current/lib:/usr/local/netpbm10/lib: 
../gsi/gsi -:p1,tl,~~bin=../bin,~~lib=../lib,~~include=../include -f 
./run-unit-tests.scm

first time!  That was with

./configure 'CC=gcc -march=native -D___CAN_IMPORT_CLIB_DYNAMICALLY' 
'--enable-single-host' '--enable-multiple-versions' '--enable-shared' 
--enable-multiple-threaded-vms


On my home box (with a lot of other things running) it didn't finish the 
"make -j 8 from-scratch", hanging at

LD_LIBRARY_PATH=..:/usr/local/libimobiledevice/lib:/pkgs/chicken-4.10.0/lib:/usr/local/Gambit/current/lib:/usr/local/netpbm10/lib: 
../gsc-boot -:~~bin=../bin,~~lib=../lib,~~include=../include -f 
-warnings -link -flat -o _gambit.c -preload _kernel.c _system.c _num.c 
_std.c _eval.c _io.c _nonstd.c _thread.c _repl.c

That was configured with

./configure 'CC=gcc -march=native -D___CAN_IMPORT_CLIB_DYNAMICALLY' 
'--enable-single-host' '--enable-shared' '--enable-multiple-versions' 
'--enable-multiple-threaded-vms'

I'll look at your suggestions for debugging this.

Brad



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