Re: [PATCH] Rmap speedup

[Daniel Phillips <phillips@arcor.de>]

Wait a second guys, the problem is with the script, look at those CPU
numbers:

> ./daniel.sh  39.78s user 71.72s system 368% cpu 30.260 total
> quad:/home/akpm> time ./daniel.sh
> ./daniel.sh  38.45s user 70.00s system 365% cpu 29.642 total

They should be 399%!!  With my fancy script, the processes themselves are
getting serialized somehow.

Lets back up and try this again with this pair of scripts, much closer to
the original:

doitlots:
-------------------------------
#!/bin/sh

doit()
{
        ( cat $1 | wc -l )
}
        
count=0
        
while [ $count != 500 ]
do
        doit doitlots > /dev/null

        count=$(expr $count + 1)
done
echo done
-------------------------------


forklots:
-------------------------------
echo >foocount
./doitlots >>foocount &
./doitlots >>foocount &
./doitlots >>foocount &
./doitlots >>foocount &
./doitlots >>foocount &
./doitlots >>foocount &
./doitlots >>foocount &
./doitlots >>foocount &
./doitlots >>foocount &

count=0

while [ $count != 10 ]
do
	count=$(wc foocount | cut -b -8)
done
-------------------------------

/me makes the sign of the beast at bash

-- 
Daniel