Nikos Vassiliadis wrote:
On Tuesday 25 September 2007 12:13, Artem Kuchin wrote:
I have dual CPU with HT. If i turn on HT (and it does help in my
case) it shoud 2000 int x4 = 8000 ints per second. SO, i have saved
200 int/second from NIC and got myself 8000 ints/second from timer.
This kind of load(200intrs/s) earns nothing from polling.
Did i
really win anything? I wish there were some good explanation on this.
It would make a difference for let's say 8000 - 10000 interrupts/sec.
You should read polling(4). It explains a lot:)
Yes, i have read the man for polling. However, it does not contain
info on when it worth enabling. From this point of view it seems like
if i have 8CPU server an a NIC with 8000 ints/sec when i enable polling
with HZ=1000 i get
about 30 ints/sec from NIC
about 16000 ints from NIC
So, we were at 8000 ints a second and now we are at 16000 ints/second.
Is it worth in this case? It seems like enabling polling on really multi
cpu computers never worth it. I think there is a mistake in my logic
here. It just canot be like this.
any thoughts?
--
Regards,
Artem
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