Re: Iperf Performance
On Wed, 23 Aug 2006, Sahadevan, Samson joseph dev wrote:
> When I run Iperf with an I/O buffer size of about 64 bytes (-l 64) and 1
> TCP stream, the CPU remains almost idle (99%-100%) and I get a BW of
> about 90Mbytes/sec (1GB link).
> Is there a way to use the CPU more efficient thereby driving more
> throughput?
The CPU being idle likely means the bottleneck is elsewhere. For
instance you may have a switch or a NIC which has reached its maximum
packet/seconds rate. In this case the CPU can not help.
You can easily verify if the bottleneck (whatever it is) is
packets/second limited by slowly increasing the packet size and
observing the maximum packets/second you get along the way.
Packets/second bottlenecks are typically found in hardware IMHO.
Keep us posted.