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I (may be being naive, but at least with good intensions ;-) )
would like to consider this as a problem (bug ?) - in two areas:
1) Gnu gcc area:
a) At best - Gnu ggc folks need to attempt to overall improve (minimize)
memory consumption
for 3.3.x and 3.4.x gcc builds
b) Less desirable - Gnu ggc folks need to improve configuration options
and/or decrease memory consumption
in "partial" (for example language-wise) builds
c) Also (IMHO) Gnu gcc folks need to provide option for doing "slower" (
more iterative ?) gcc build process
but with guaranteed low memory consumption
d) At the very least - Gnu gcc folks need to clearly document current
memory consumption reqs for
3.2.x, 3.3.x, 3.4.x .
2) Kernel area (this is subject of discussion - please consider below as
just a guess talking point ...)
a) Improve/optimize 2.6 kernel swapper functionality in general (? )
b) Fix (if this does not really work ?)
>swap has to be on a directly attached storage device. At least, I've
>never been able to make swapping over NFS work.
Constructive responses are welcomed !
Thanks,
Best Regards,
Alex
-----Original Message-----
From: Kai Ruottu [mailto:karuottu@mbnet.fi]
Sent: Tuesday, October 19, 2004 3:37 AM
To: Lennert Buytenhek
Cc: Povolotsky, Alexander; crossgcc
Subject: Re: getting memory errors when natively bulding native gnu gcc
3.3.2 compiler on PQ2FADS-VR with 32 MB DRAM memory
Lennert Buytenhek wrote:
> On Sun, Oct 17, 2004 at 11:19:51AM -0400, Povolotsky, Alexander wrote:
>>Out of Memory: Killed process 9807 (cc1).
>>powerpc-linux-gcc-3.3.2: Internal error: Terminated (program cc1)
>
> You ran out of memory, and the kernel had to kill your cc1 process.
>
> Nothing you can do about that really, apart from adding memory or
> adding swap.
The amount of memory required for running software seems to follow
something
like "The Law of More"... In early 80's 64 kbytes was enough, in late 80's
640
kbytes, in early 90's 6.4 Mbytes, in late 90's 64 Mbytes and now in early
2000's
this seems to be 640 Mbytes...
Using 'top -b' during the GCC-build and then grep'ing the 'cc1' process
values
from the logfile, then sort'ing it, I got the following max memory needs for
the
gcc-3.2.3 when building the gcc-3.2.3 sources :
3747 root 25 0 24436 23M 3856 R 99,6 4,7 1:31 cc1
3747 root 25 0 24012 23M 3744 R 99,6 4,6 1:21 cc1
3747 root 25 0 23032 22M 3796 R 99,6 4,4 1:26 cc1
3747 root 25 0 22804 22M 3744 R 99,5 4,4 1:16 cc1
So 23 Mbytes was required for this compile. Meanwhile for the newer
gcc-3.3.5
when compiling the gcc-3.3.5 sources I got something much bigger :
26227 root 25 0 114M 114M 3804 R 99,3 22,7 1:25 cc1
26227 root 25 0 113M 113M 3852 R 99,4 22,6 1:30 cc1
26227 root 25 0 113M 113M 3776 R 99,4 22,6 1:20 cc1
26227 root 25 0 108M 108M 3688 R 99,3 21,6 1:15 cc1
This was tested with a RedHat 7.3 target cross-toolchain being for the
host and
'i486-linux-gnu' being the target, on my RedHat 8.0 build system.
So, with gcc-3.2.x having 64 Mbytes or even only 32 Mbytes on the build
system
could be enough, but this isn't the case with gcc-3.3.x any more. One can
only
try to guess what the gcc-3.4.x and the under-construction gcc-4.x could
then
require... Maybe the current 512 Mbytes in my build system isn't enough.
If one thinks gcc-3.2.x being good enough, then maybe something can be
done with this issue... Is there some serious problem with gcc-3.2.x and
Linux/PPC ? The RedHat 8.0 and AFAIK the RedHat 9.0 came with gcc-3.2.x,
maybe SuSE 9.0 etc., so with x86 there seemingly was no problems....
If one has only 32 or 64 Mbytes on the target board but wants to try
building
GCC natively, maybe the general advice would be to forget gcc-3.3.x and
newer
GCCs and use some earlier GCC with its much smaller memory requirements...
I really had suspected something like this when things suddenly didn't seem
to
work on the old 64 Mbyte PCs... In late 80's having 5 + 8 = 13 Mbytes in a
VAX
was really much memory and having 64 Mbytes in a PC and so being capable to
do
things one could earlier do only in mainframes, was something which could be
told in news (some Finnish research organization for agriculture moved their
statistical jobs to a PC from a mainframe...). But is this current or
"Really
Soon Now" need for 640 Mbytes memory for building GCC really what the GCC
users
will want, or only what the memory makers will want?
I really thought it should still be possible to build (in reasonable time)
GCCs
in those 5 - 10 years old PCs with only 64 Mbyte memory (4 x 16 MB SIMM)...
Cheers, Kai
-----Original Message-----
From: Povolotsky, Alexander
Sent: Sunday, October 17, 2004 11:20 AM
To: 'linux-kernel@vger.kernel.org'; 'gcc-bugs@gcc.gnu.org'
Cc: 'Bill Davidsen'; 'Kai Ruottu'; 'Dan Kegel'; 'bertrand marquis';
'Kumar Gala'; 'Robb, Sam'; 'Martin Schaffner'; 'Benjamin Herrenschmidt';
crossgcc
Subject: getting memory errors when natively bulding native gnu gcc
3.3.2 compiler on PQ2FADS-VR with 32 MB DRAM memory
Hi,
I am trying to natively build native gnu gcc 3.3.2 compiler from the source
tar ball on PQ2FADS-VR (MPC 8275)
with 32 MB DRAM memory, running "vanilla" Linux 2.6.8-rc4 kernel (built by
me) with NFS mounted root file system ("/fadsroot") and getting memory
errors (see listing below).
For such (as above) native building I use another "native" gnu gcc 3.3.2
compiler,
which, in turn, was generated via cross-compiling on cygwin
(BIG Thanks to Kai Ruottu for his GREAT help on that!)
and placed on NFS mounted root file system.
Note that on cygwin I already had good working/tested gcc crosscompile for
PQ2FADS-VR (MPC 8275) - I used it
to build U-boot, "vanilla" Linux 2.6.8-rc4 kernel
(built by me with BIG Help from cross-compiling community and Kumar Gala),
lmbench, ctcs (Cerberus Test Control System).
Prior to attempting to natively build native gnu gcc 3.3.2 compiler
from the source tar ball on PQ2FADS-VR (MPC 8275)
- gnu coreutils, gawk and sed were also cross-compiled on cygwin
and placed on NFS mounted root file system).
root@192:/gcc/gcc-3.3.2# uname -a
Linux 192.168.0.5 2.6.8-rc4 #6 Wed Sep 29 13:33:22 EDT 2004 ppc unknown
unknown
GNU/Linux
The native crooscompile (built by cross-compiling on cygwin)
# gcc -v
Using built-in specs.
Configured with: ./configure --host=powerpc-linux --target=powerpc-linux
--build
=i686-linux --disable-shared : (reconfigured) ./configure
--host=powerpc-linux -
-target=powerpc-linux --build=i686-linux --disable-shared
--prefix=/home/gaiotto
/local : (reconfigured) ./configure --target=powerpc-linux
--host=powerpc-linux
--build=i686-linux --enable-shared --enable-threads --enable-languages=c :
(reco
nfigured) ./configure --target=powerpc-linux --host=powerpc-linux
--build=i686-l
inux --enable-shared --enable-threads --enable-languages=c
--prefix=/home/gaiott
o/local
Thread model: posix
gcc version 3.3.2
I have tried two variants of doing it ( build native gnu gcc 3.3.2 compiler
from the source tar ball):
a)
make CFLAGS='-O' LIBCFLAGS='-g -O2'LIBCXXFLAGS='-g -O2
-fno-implicit-templates' bootstrap
b) using script (see below listed), which was modified (by me) from the
script,
originally provided to me (for cross-compiling on cygwin) by Kai Ruottu
(see above).
In either case, I am getting errors (oom-killer: gfp_mask=0x1d2 ... - see
below)
................
./genpeep ./config/rs6000/rs6000.md > tmp-peep.c
/bin/sh ./move-if-change tmp-peep.c insn-peep.c
echo timestamp > s-peep
/usr/local/bin/powerpc-linux-gcc-3.3.2 -Os -DIN_GCC -W -Wall
-Wwrite-strings
-Wstrict-prototypes -Wmissing-prototypes -Wtraditional -pedantic
-Wno-long-long
-DHAVE_CONFIG_H -I. -I. -I. -I./. -I./config -I./../include -c
insn-peep.c
\
-o insn-peep.o
/usr/local/bin/powerpc-linux-gcc-3.3.2 -c -Os -DIN_GCC -W -Wall
-Wwrite-stri
ngs -Wstrict-prototypes -Wmissing-prototypes -Wtraditional -pedantic
-Wno-long-l
ong -DHAVE_CONFIG_H -DGENERATOR_FILE -I. -I. -I. -I./. -I./config
-I./../in
clude ./genrecog.c -o genrecog.o
/usr/local/bin/powerpc-linux-gcc-3.3.2 -Os -DIN_GCC -W -Wall
-Wwrite-strings
-Wstrict-prototypes -Wmissing-prototypes -Wtraditional -pedantic
-Wno-long-long
-DHAVE_CONFIG_H -DGENERATOR_FILE -o genrecog \
genrecog.o rtl.o read-rtl.o bitmap.o ggc-none.o gensupport.o
insn-conditions.o
print-rtl1.o \
errors.o ../libiberty/libiberty.a
./genrecog ./config/rs6000/rs6000.md > tmp-recog.c
./config/rs6000/altivec.md:1618: warning: operand 3 missing mode?
./config/rs6000/altivec.md:1628: warning: operand 3 missing mode?
./config/rs6000/altivec.md:1638: warning: operand 3 missing mode?
./config/rs6000/altivec.md:1648: warning: operand 3 missing mode?
/bin/sh ./move-if-change tmp-recog.c insn-recog.c
echo timestamp > s-recog
/usr/local/bin/powerpc-linux-gcc-3.3.2 -Os -DIN_GCC -W -Wall
-Wwrite-strings
-Wstrict-prototypes -Wmissing-prototypes -Wtraditional -pedantic
-Wno-long-long
-DHAVE_CONFIG_H -I. -I. -I. -I./. -I./config -I./../include -c
insn-recog.
c \
-o insn-recog.o
oom-killer: gfp_mask=0x1d2
DMA per-cpu:
cpu 0 hot: low 4, high 12, batch 2
cpu 0 cold: low 0, high 4, batch 2
Normal per-cpu: empty
HighMem per-cpu: empty
Free pages: 360kB (0kB HighMem)
Active:6908 inactive:0 dirty:0 writeback:0 unstable:0 free:90 slab:525
mapped:69
08 pagetables:39
DMA free:360kB min:180kB low:360kB high:540kB active:27632kB inactive:0kB
presen
t:32768kB
protections[]: 90 90 90
Normal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB
protections[]: 0 0 0
HighMem free:0kB min:128kB low:256kB high:384kB active:0kB inactive:0kB
present:
0kB
protections[]: 0 0 0
DMA: 8*4kB 1*8kB 0*16kB 1*32kB 1*64kB 0*128kB 1*256kB 0*512kB 0*1024kB
0*2048kB
0*4096kB = 392kB
Normal: empty
HighMem: empty
Swap cache: add 0, delete 0, find 0/0, race 0+0
Out of Memory: Killed process 9807 (cc1).
powerpc-linux-gcc-3.3.2: Internal error: Terminated (program cc1)
Please submit a full bug report.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
make[1]: *** [insn-recog.o] Error 1
make[1]: Leaving directory `/gcc/gcc-3.3.2/gcc'
make: *** [all-gcc] Error 2
root@192:/gcc/gcc-3.3.2#
Here is more info re my board,
ps
PID TTY TIME CMD
1 ? 00:00:02 bash
2 ? 00:00:00 ksoftirqd/0
3 ? 00:00:00 events/0
4 ? 00:00:00 khelper
5 ? 00:00:00 kblockd/0
6 ? 00:00:00 pdflush
7 ? 00:00:00 pdflush
8 ? 00:05:10 kswapd0
9 ? 00:00:00 aio/0
10 ? 00:00:38 rpciod
11 ? 00:00:00 bash
9810 ? 00:00:00 ps
# mount
rootfs on / type rootfs (rw)
/dev/root on / type nfs
(rw,v2,rsize=4096,wsize=4096,hard,udp,nolock,addr=192.168.0.4)
none on /proc type proc (rw,nodiratime)
Here is the script mentioned in b) (way above).
#!/bin/sh
AR=/usr/local/bin/powerpc-linux-ar \
CC=/usr/local/bin/powerpc-linux-gcc-3.3.2 \
CFLAGS=-Os \
CXXFLAGS=-Os \
NM=/usr/local/bin/powerpc-linux-nm \
RANLIB=/usr/local/bin/powerpc-linux-ranlib \
AR_FOR_BUILD=/usr/local/bin/powerpc-linux-ar \
CC_FOR_BUILD=/usr/local/bin/powerpc-linux-gcc-3.3.2 \
GCC_FOR_BUILD=/usr/local/bin/powerpc-linux-gcc-3.3.2 \
NM_FOR_BUILD=/usr/local/bin/powerpc-linux-nm \
RANLIB_FOR_BUILD=/usr/local/bin/powerpc-linux-ranlib \
AR_FOR_TARGET=/usr/local/bin/powerpc-linux-ar \
CC_FOR_TARGET=/usr/local/bin/powerpc-linux-gcc-3.3.2 \
GCC_FOR_TARGET=/usr/local/bin/powerpc-linux-gcc-3.3.2 \
CXX_FOR_TARGET=/usr/local/bin/powerpc-linux-g++.exe \
OLDCC=/usr/local/bin/powerpc-linux-gcc-3.3.2 \
NM_FOR_TARGET=/usr/local/bin/powerpc-linux-nm \
RANLIB_FOR_TARGET=/usr/local/bin/powerpc-linux-ranlib \
./configure --build=ppc-linux-gnu --host=ppc-linux-gnu
--target=ppc-linux-gnu --
prefix=/usr --with-threads --enable-shared
#
make all-build-libiberty
make all-gcc LANGUAGES="c c++ objc gcov proto"
------
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