* Re: ulimit strangeness [not found] <1021114164332.ZM7641@candle.brasslantern.com> @ 2002-11-15 11:55 ` Peter Stephenson 2002-11-15 12:57 ` jarausch 2002-11-16 3:13 ` Bart Schaefer 0 siblings, 2 replies; 4+ messages in thread From: Peter Stephenson @ 2002-11-15 11:55 UTC (permalink / raw) To: Zsh hackers list "Bart Schaefer" wrote: > zsh% ulimit -v $[200*1024]; limit > cputime unlimited > filesize unlimited > datasize unlimited > stacksize 8MB > coredumpsize unlimited > memoryuse unlimited > maxproc 2040 > descriptors 1024 > memorylocked unlimited > addressspace 200kB <-- Note, not 200 megabytes! > > It looks like this has something to do with the convoluted #ifdef that > prevents duplicate case labels in rlimits.c when both RLIMIT_RSS and > RLIMIT_VMEM are defined, but I haven't yet figured out what to fix. My guess is the test `RLIMIT_RSS != RLIMIT_VMEM' is incorrectly failing in the preprocessor, i.e. it thinks RLIMIT_RSS == RLIMIT_VMEM owing to the way the definitions are laid out. Checking /usr/include/sys/resource.h or carefully hidden equivalent should confirm or refute this. The following programme might help. #include <stdio.h> #include <sys/resource.h> int main(int argc, char **argv) { #if defined(RLIMIT_RSS) && defined(RLIMIT_VMEM) printf("You have both definitions.\n"); if (RLIMIT_RSS == RLIMIT_VMEM) { printf("Both have the same value.\n"); } else { printf("They have different values.\n"); #if RLIMIT_RSS == RLIMIT_VMEM printf("!!!You should never see this message!!!\n"); #endif } #else #ifdef RLIMIT_RSS printf("You only have RSS\n"); #else #ifdef RLIMIT_VMEM printf("You only have VMEM\n"); #else printf("You have neither definition.\n"); #endif #endif #endif return 0; } We could probe this more reliably than at present in configure. -- Peter Stephenson <pws@csr.com> Software Engineer CSR Ltd., Science Park, Milton Road, Cambridge, CB4 0WH, UK Tel: +44 (0)1223 692070 ********************************************************************** The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any computer. ********************************************************************** ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: ulimit strangeness 2002-11-15 11:55 ` ulimit strangeness Peter Stephenson @ 2002-11-15 12:57 ` jarausch 2002-11-16 3:13 ` Bart Schaefer 1 sibling, 0 replies; 4+ messages in thread From: jarausch @ 2002-11-15 12:57 UTC (permalink / raw) To: pws; +Cc: zsh-workers On 15 Nov, Peter Stephenson wrote: > "Bart Schaefer" wrote: >> zsh% ulimit -v $[200*1024]; limit >> cputime unlimited >> filesize unlimited >> datasize unlimited >> stacksize 8MB >> coredumpsize unlimited >> memoryuse unlimited >> maxproc 2040 >> descriptors 1024 >> memorylocked unlimited >> addressspace 200kB <-- Note, not 200 megabytes! >> >> It looks like this has something to do with the convoluted #ifdef that >> prevents duplicate case labels in rlimits.c when both RLIMIT_RSS and >> RLIMIT_VMEM are defined, but I haven't yet figured out what to fix. > > My guess is the test `RLIMIT_RSS != RLIMIT_VMEM' is incorrectly failing > in the preprocessor, i.e. it thinks RLIMIT_RSS == RLIMIT_VMEM owing to > the way the definitions are laid out. Checking > /usr/include/sys/resource.h or carefully hidden equivalent should > confirm or refute this. The following programme might help. > > #include <stdio.h> > #include <sys/resource.h> > > int main(int argc, char **argv) > { > #if defined(RLIMIT_RSS) && defined(RLIMIT_VMEM) > printf("You have both definitions.\n"); > if (RLIMIT_RSS == RLIMIT_VMEM) > { > printf("Both have the same value.\n"); > } > else > { > printf("They have different values.\n"); > #if RLIMIT_RSS == RLIMIT_VMEM > printf("!!!You should never see this message!!!\n"); > #endif > } > #else > #ifdef RLIMIT_RSS > printf("You only have RSS\n"); > #else > #ifdef RLIMIT_VMEM > printf("You only have VMEM\n"); > #else > printf("You have neither definition.\n"); > #endif > #endif > #endif > > return 0; > } > > We could probe this more reliably than at present in configure. > Here on my machine (Linux-From-Scratch 2.4.20-rc1 glibc 2.2.5) I get You only have RSS. Thanks, Helmut Jarausch Lehrstuhl fuer Numerische Mathematik Aachen University D 52056 Aachen, Germany ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: ulimit strangeness 2002-11-15 11:55 ` ulimit strangeness Peter Stephenson 2002-11-15 12:57 ` jarausch @ 2002-11-16 3:13 ` Bart Schaefer 2002-11-18 10:31 ` Peter Stephenson 1 sibling, 1 reply; 4+ messages in thread From: Bart Schaefer @ 2002-11-16 3:13 UTC (permalink / raw) To: Zsh hackers list On Nov 15, 11:55am, Peter Stephenson wrote: } Subject: Re: ulimit strangeness } } "Bart Schaefer" wrote: } > It looks like this has something to do with the convoluted #ifdef that } > prevents duplicate case labels in rlimits.c when both RLIMIT_RSS and } > RLIMIT_VMEM are defined, but I haven't yet figured out what to fix. } } My guess is the test `RLIMIT_RSS != RLIMIT_VMEM' is incorrectly failing } in the preprocessor, i.e. it thinks RLIMIT_RSS == RLIMIT_VMEM owing to } the way the definitions are laid out. No, it's this, in Src/system.h: /* we use the SVR4 constant instead of the BSD one */ #if !defined(RLIMIT_NOFILE) && defined(RLIMIT_OFILE) # define RLIMIT_NOFILE RLIMIT_OFILE #endif #if !defined(RLIMIT_VMEM) && defined(RLIMIT_AS) # define RLIMIT_VMEM RLIMIT_AS #endif So RLIMIT_VMEM *is* defined, and is not the same as RLIMIT_RSS, and ... -- Bart Schaefer Brass Lantern Enterprises http://www.well.com/user/barts http://www.brasslantern.com Zsh: http://www.zsh.org | PHPerl Project: http://phperl.sourceforge.net ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: ulimit strangeness 2002-11-16 3:13 ` Bart Schaefer @ 2002-11-18 10:31 ` Peter Stephenson 0 siblings, 0 replies; 4+ messages in thread From: Peter Stephenson @ 2002-11-18 10:31 UTC (permalink / raw) To: Zsh hackers list "Bart Schaefer" wrote: > #if !defined(RLIMIT_VMEM) && defined(RLIMIT_AS) > # define RLIMIT_VMEM RLIMIT_AS > #endif > > So RLIMIT_VMEM *is* defined, and is not the same as RLIMIT_RSS, and ... Then it shouldn't trigger the problem --- the 1024 factor should be applied. -- Peter Stephenson <pws@csr.com> Software Engineer CSR Ltd., Science Park, Milton Road, Cambridge, CB4 0WH, UK Tel: +44 (0)1223 692070 ********************************************************************** The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any computer. ********************************************************************** ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2002-11-18 10:32 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- [not found] <1021114164332.ZM7641@candle.brasslantern.com> 2002-11-15 11:55 ` ulimit strangeness Peter Stephenson 2002-11-15 12:57 ` jarausch 2002-11-16 3:13 ` Bart Schaefer 2002-11-18 10:31 ` Peter Stephenson
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