Solaris 10

UNIX Solaris
1

I am working on a Solaris 10 server that is quite locked down. When testing we want to add 15% more load to the CPU. We are unable to add stress or any program to do so. Does anyone have a way to do it where you can add lets say 10, 15, 20 percent load to cpu on top of this psrinfo -v gives me 175 virtual processors. psrinfo -pv gives me 4 physical processors

sparc-m5 32 virtual processors
sparc-m5 48 virtual processors
sparc-m5 48 virtual processors
sparc-m5 48 virtual processors

all clocking 3600MHz.

2

You can use this ksh/bash function:

# Usage: lc [number_of_virtual_cpus_to_load [number_of_seconds] ]
lc() {
  (
    pids=""
    cpus=${1:-1}
    seconds=${2:-60}
    echo loading $cpus CPUs for $seconds seconds
    trap 'for p in $pids; do kill $p; done' 0
    for ((i=0;i<cpus;i++)); do while : ; do : ; done & pids="$pids $!"; done
    sleep $seconds
  )
}
1 Like
3

May I ask what the colon is for in front of the numbers? can I do 3600 seconds and 20 virtual cpu? can I save this as lc.sh?

4

That's the default values (one vCPU for 60 seconds)

Sure, there is no hardcoded limit.

Up to you. I'd rather save it in $HOME/Functions/lc and set FPATH=~/Functions (assuming ksh is used).

5

I tried this as bash and it did not do anything. This is all I changed.
cpus=${27}
seconds=${60)

6

There is nothing to change in the shell function I posted.

If you saved the function in lc.sh, run this:

. lc.sh
lc 27 60