Re: configure option to specify mmap/shm
On Thu, Feb 07, 2002 at 09:06:40AM -0800, MATHIHALLI,MADHUSUDAN (HP-Cupertino,ex1) wrote: > Hi, > Question : > What option(s) should I pass to the configure to enable/disable the > various SHM options (MMAP, SHMGET)..(sorry if it's a dumb question) > > Problem : > On a HPUX 11i system (worker MPM, 2.0.31), I'm seeing the following in > srclib/apr/include/apr.h : > #define APR_USE_SHMEM_MMAP_TMP 0 > #define APR_USE_SHMEM_MMAP_SHM 0 > #define APR_USE_SHMEM_MMAP_ZERO1 > #define APR_USE_SHMEM_SHMGET_ANON 0 > #define APR_USE_SHMEM_SHMGET 1 > #define APR_USE_SHMEM_MMAP_ANON0 > #define APR_USE_SHMEM_BEOS 0 > > I want to build using APR_USE_SHMEM_SHMGET_ANON rather than > APR_USE_SHMEM_MMAP_ZERO.. I'm currently doing the ugly method of manually > editing it after the configure is run. Does MMAP_ZERO not work on your platform? If so we should probably improve our autoconf test instead of provide override options. -aaron
RE: configure option to specify mmap/shm
Nope.. It does not work (for me).. That's the reason I need to change to to use SHMGET_ANON.. I was thinking that there'a already a option available to do such things.. BTW, is it not strange that it picks up APR_USE_SHMEM_SHMGET, but not APR_USE_SHMEM_SHMGET_ANON and rather decides to select APR_USE_SHMEM_MMAP_ZERO.. -Madhu -Original Message- From: Aaron Bannert [mailto:[EMAIL PROTECTED]] Sent: Thursday, February 07, 2002 9:12 AM To: [EMAIL PROTECTED] Subject: Re: configure option to specify mmap/shm On Thu, Feb 07, 2002 at 09:06:40AM -0800, MATHIHALLI,MADHUSUDAN (HP-Cupertino,ex1) wrote: > Hi, > Question : > What option(s) should I pass to the configure to enable/disable the > various SHM options (MMAP, SHMGET)..(sorry if it's a dumb question) > > Problem : > On a HPUX 11i system (worker MPM, 2.0.31), I'm seeing the following in > srclib/apr/include/apr.h : > #define APR_USE_SHMEM_MMAP_TMP 0 > #define APR_USE_SHMEM_MMAP_SHM 0 > #define APR_USE_SHMEM_MMAP_ZERO1 > #define APR_USE_SHMEM_SHMGET_ANON 0 > #define APR_USE_SHMEM_SHMGET 1 > #define APR_USE_SHMEM_MMAP_ANON0 > #define APR_USE_SHMEM_BEOS 0 > > I want to build using APR_USE_SHMEM_SHMGET_ANON rather than > APR_USE_SHMEM_MMAP_ZERO.. I'm currently doing the ugly method of manually > editing it after the configure is run. Does MMAP_ZERO not work on your platform? If so we should probably improve our autoconf test instead of provide override options. -aaron
Re: configure option to specify mmap/shm
On Thu, Feb 07, 2002 at 09:21:20AM -0800, MATHIHALLI,MADHUSUDAN (HP-Cupertino,ex1) wrote: > Nope.. It does not work (for me).. That's the reason I need to change to to > use SHMGET_ANON.. I was thinking that there'a already a option available to > do such things.. > > BTW, is it not strange that it picks up APR_USE_SHMEM_SHMGET, but not > APR_USE_SHMEM_SHMGET_ANON and rather decides to select > APR_USE_SHMEM_MMAP_ZERO.. For anonymous shared memory, it prefers MMAP_ZERO over SHMGET_ANON. You probably have these on your system: header:sys/mman.h func:mmap() func:munmap() file:/dev/zero Is there anything else we could test to see if it's not working? Is it possible that MMAP_ZERO's implementation is simple broken? Send me the error you are seeing, and optionally a truss output also. -aaron
Re: configure option to specify mmap/shm
Aaron Bannert wrote: > > For anonymous shared memory, it prefers MMAP_ZERO over SHMGET_ANON. Which is good because then you don't have to worry so much about the shared mem segment sizes configured in the kernel. -- === Jim Jagielski [|] [EMAIL PROTECTED] [|] http://www.jaguNET.com/ "A society that will trade a little liberty for a little order will lose both and deserve neither" - T.Jefferson
RE: configure option to specify mmap/shm
I wrote a small test program - attached is the program and the output..
-Madhu
$ ./xx
mmap: No such device
$
$
$ ls -ld /dev/zero
crw-rw-rw- 1 binsys 3 0x04 Jul 17 2001 /dev/zero
#include
#include
#include
int main(int argc, char *argv[])
{
void *m;
int tmpfd;
char *filename = NULL;
if (filename == NULL) {
if ((tmpfd = open("/dev/zero", O_RDWR, 0666)) < 0) {
perror("open");
return -1;
}
m = mmap(NULL, 256000, PROT_READ|PROT_WRITE, MAP_SHARED, tmpfd, 0);
if (m == MAP_FAILED) {
perror("mmap");
return -1;
}
if (munmap(m, 256000) == -1) {
perror("munmap");
return -1;
}
}
return 0;
}
-Original Message-
From: Aaron Bannert [mailto:[EMAIL PROTECTED]]
Sent: Thursday, February 07, 2002 9:47 AM
To: [EMAIL PROTECTED]
Subject: Re: configure option to specify mmap/shm
On Thu, Feb 07, 2002 at 09:21:20AM -0800, MATHIHALLI,MADHUSUDAN
(HP-Cupertino,ex1) wrote:
> Nope.. It does not work (for me).. That's the reason I need to change to
to
> use SHMGET_ANON.. I was thinking that there'a already a option available
to
> do such things..
>
> BTW, is it not strange that it picks up APR_USE_SHMEM_SHMGET, but not
> APR_USE_SHMEM_SHMGET_ANON and rather decides to select
> APR_USE_SHMEM_MMAP_ZERO..
For anonymous shared memory, it prefers MMAP_ZERO over SHMGET_ANON.
You probably have these on your system:
header:sys/mman.h
func:mmap()
func:munmap()
file:/dev/zero
Is there anything else we could test to see if it's not working? Is it
possible that MMAP_ZERO's implementation is simple broken? Send me
the error you are seeing, and optionally a truss output also.
-aaron
Re: configure option to specify mmap/shm
On Thu, Feb 07, 2002 at 01:19:45PM -0500, MATHIHALLI,MADHUSUDAN (HP-Cupertino,ex1) wrote: > I wrote a small test program - attached is the program and the output.. This discussion has moved to [EMAIL PROTECTED] -aaron
