[Openswan dev] ocf-bench bug & performance :)

[David McCullough]

Jivin Paul Wouters lays it down ...
> 
> I was benchmarking OCF and my machine was too fast for ocf-bench:
> 
> [  170.239129] OCF: 1040 requests of 1488 bytes in 0 jiffies (0.000 Mbps)
> 
> The bench mark is wrong for anything happening in under a jiffy :)

Now I just need you to send me a system so that I can reproduce that :-) :-)

> This was on an 8 core:
> 
> processor	: 7
> vendor_id	: GenuineIntel
> cpu family	: 6
> model		: 23
> model name	: Intel(R) Xeon(R) CPU           E5410  @ 2.33GHz
> stepping	: 6
> cpu MHz		: 2333.379
> 
> When I used 10000 requests instead of 1000 it worked better:
> 
> [  229.023024] OCF: 10037 requests of 1488 bytes in 5 jiffies (2389.608 Mbps)
> 
> Perhaps make 10000 the new default if request_num= is not specified? Though
> even that "5" seems dangerously low. Running with request_num=100000 I got:
> 
> [  460.738971] OCF: 100035 requests of 1488 bytes in 49 jiffies (2430.238 Mbps)

Neat,  thats 4 times what I see on my core2 duo, just what the doctor
ordered.

Might be better to rework that code to run for a minimum number of jiffies ;-)

Cheers,
Davidm

-- 
David McCullough,      david_mccullough at mcafee.com,  Ph:+61 734352815
McAfee - SnapGear      http://www.mcafee.com         http://www.uCdot.org