topic Re: ENOMEM returned while executing pthread_attr_init on HP11i in Operating System - HP-UX

ENOMEM returned while executing pthread_attr_init on HP11i

Suresh Ollala — Wed, 24 Sep 2003 09:25:16 GMT

Hi
I have compiled ACE 5.2 on HP 11i and my application uses it to spawn threads. While executing the call pthread_attr_init i get a return code of 12. sys/types/errno.h has the following #define for error code 12.
#define ENOMEM 12

This indicates that there is not enough memory left on the device whereas my ulimit shows the following
[69] % ulimit -a
time(seconds) unlimited
file(blocks) unlimited
data(kbytes) 267324
stack(kbytes) 8192
memory(kbytes) unlimited
coredump(blocks) 4194303
nofiles(descriptors) 2048

i also tried on some other machine with the limits as given by the following
[101] % ulimit -a
time(seconds) unlimited
file(blocks) unlimited
data(kbytes) 1048576
stack(kbytes) 8192
memory(kbytes) unlimited
coredump(blocks) 4194303
nofiles(descriptors) 60
[102] %

but on this also i get the same error code. Is there any other parameter which i need to set ?

Does anyone have an idea about the various conditions that can give rise to this error ?

Also maxdsize on mysystem has a value 66831
Thanks
Sonali

Re: ENOMEM returned while executing pthread_attr_init on HP11i

Mark Grant — Wed, 24 Sep 2003 09:36:20 GMT

You could be out of swap.

Re: ENOMEM returned while executing pthread_attr_init on HP11i

Umapathy S — Wed, 24 Sep 2003 09:43:54 GMT

Sonali,
You may be out of swap space. Check with swapinfo -mt. Check the swapmem_on kernel param.
HTH,
Umapathy

Re: ENOMEM returned while executing pthread_attr_init on HP11i

A. Clay Stephenson — Wed, 24 Sep 2003 09:44:09 GMT

Ulimit is a necessary but not sufficient test. You are probably hitting the "hard" limits imposed by the kernel. Check the values of maxdsiz (and if this is 64-bit code) maxdsiz_64bit. I also note that you have left the maxssiz at 8MB and this is typically a little small. I would increase maxssiz to 32MB or so -- which should be plenty. You will need to increase these values and then gen a new kernel.

Re: ENOMEM returned while executing pthread_attr_init on HP11i

Suresh Ollala — Wed, 24 Sep 2003 09:55:20 GMT

1. swap space is set to 4gb
2. maxdsize is set to 277MB, this is what my sam shows

-Suresh

Re: ENOMEM returned while executing pthread_attr_init on HP11i

Mark Grant — Wed, 24 Sep 2003 09:58:59 GMT

You need to look at the reserved swap figure.Try "swapinfo -mt" and see what percentage of total is being used. A process in HP-UX reserves swap that it might need later even if it is never used.

Re: ENOMEM returned while executing pthread_attr_init on HP11i

Suresh Ollala — Wed, 24 Sep 2003 10:00:42 GMT

# swapinfo -mt
Mb Mb Mb PCT START/ Mb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 4096 0 4096 0% 0 - 1 /dev/vg00/lvol2
reserve - 178 -178
memory 3029 374 2655 12%
total 7125 552 6573 8% - 0 -