HPUX 11.11 memory allocation policy

[Massimo Bianchi]

Hello everyone,
I would like to know the memory allocation policy in HPUX, and if i can change it.
On HPUX 10.20 I could query the kernel, using
'echo "use_bestfit/D" | adb /stand/vmunix /dev/kmem'
I tried this on a 11i but it didn't work.
Using shminfo i can see that it is using a sort of firstfit policy, but i would prefer a bestfit policy...
Thanks,
Massimo

[Michael Tully]

Some of them have changed, see the below examples:


for HP-UX 10x
example:

echo physmem/D | adb -k /stand/vmunix /dev/kmem
physmem:
physmem: 24576

for HP-UX 11.x systems running on 32 bit architecture:
example:

echo phys_mem_pages/D | adb /stand/vmunix /dev/kmem
phys_mem_pages:
phys_mem_pages: 24576

for HP-UX 11.x systems running on 64 bit architecture:
example:

echo phys_mem_pages/D | adb64 -k /stand/vmunix /dev/mem
phys_mem_pages:
phys_mem_pages: 262144

The results of these commands are in memory pages, multiply by 4096
to obtain the size in bytes.

To determine the amount of lockable memory:
example:

echo total_lockable_mem/D | adb -k /stand/vmunix /dev/mem
total_lockable_mem:
total_lockable_mem: 185280

To determine the number of free swap pages :
example:

echo swapspc_cnt/D | adb -k /stand/vmunix /dev/kmem
swapspc_cnt:
swapspc_cnt: 216447

This will display the number of free swap pages.
Multiply the number returned by 4096 for the number of free swap bytes.

To determine the processor speed:
example:
echo itick_per_usec/D | adb -k /stand/vmunix /dev/mem
itick_per_usec:
itick_per_usec: 360

To determine the number of processors in use:
example:
echo "runningprocs/D" | adb -k /stand/vmunix /dev/mem
runningprocs:
runningprocs: 2

To determine the number of pages of buffer cache ( 4Kb in size)
example:
echo bufpages/D | adb -k /stand/vmunix /dev/mem
bufpages:
bufpages: 18848

To display kernel parameters using adb use the parameter name :
example:
echo nproc/D | adb -k /stand/vmunix /dev/mem
nproc:
nproc: 276

To determine the kernel your booted from:
example:
10.x
echo 'boot_string/S' | adb /stand/vmunix /dev/mem
boot_string:
boot_string: disc(52.6.0;0)/stand/vmunix

11.x
echo 'boot_string/S' | adb /stand/vmunix /dev/mem
boot_string:
boot_string: disk(0/0/2/0.6.0.0.0.0.0;0)/stand/vmunix

[Massimo Bianchi]

Closing....