Time taken for creation of a huge core file

Applications Filesystems, Disks and Memory
1

Hi,
I needed to know how I can find out the time needed for an Unix machine(HP) to create a corefile as huge as 500MB(core created either by a SEGV or a kill -6 command). An approximate figure of the time taken would be really helpful.:confused:

2

It just took me 1 minute 19 seconds. But not all HP system run at the same rate. Why not just give it try and time it for yourself on your system?

3

Thanx for your reply.
I would like to try it out myself on my system for which I want to know the exact process(steps) you carried out to determine the time(of 1 min 19 secs) so that I can follow the same.
Pls let me know how u did it.

4

I wrote a program:

char x1[100000000];
char x2[100000000];
char x3[100000000];
char x4[100000000];
char x5[100000000];
main() { kill(getpid(),6); }

Call the program "bigdump.c". Then:
cc bigdump.c -o bigdump
date ; ./bigdump ; date

5

time dd if=/dev/zero of=bigfile bs=1024 count=500000

will time creation of a 500MB file on just about any unix.