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How much can you improve network throughput with a high-end NIC?

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Old 04-10-2008
How much can you improve network throughput with a high-end NIC?
Thu, 10 Apr 2008 15:00:00 GMT
What sort of impact can you expect from switching a machine from the Gigabit Ethernet NIC that come on its motherboard to a higher-end Intel desktop NIC? I benchmarked two common gigabit NICs found on motherboards against two Intel PCIe desktop gigabit NICs, targeting the specific purpose of accessing an NFS share over the network. The short version: throughput for sequential read/write operations didn't improve much, but latency was much better, allowing anything that needs a network round trip, like create, delete, and seek, to work much faster.


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LEARN ABOUT OPENSOLARIS

iwh

iwh(7D) 							      Devices								   iwh(7D)

NAME

       iwh - Intel(R) WiFi Link 5100/5300 Driver

DESCRIPTION

       The  iwh  802.11a/g/n  wireless NIC driver is a multi-threaded, loadable, clonable, GLDv3-based STREAMS driver supporting the Intel Shirley
       Peak WiFi  chipset-based NIC's. Driver functions  include controller initialization, wireless 802.11 infrastructure network connection, WEP
       and  frame transmit and receive.

CONFIGURATION

       The iwh driver performs auto-negotiation  to determine the data rate and mode. Supported 802.11b data rates are 1, 2, 5.5 and 11 Mbits/sec.
       Supported 802.11g data rates are 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48 and 54 Mbits/sec.

FILES

       /dev/iwh 		 Special character device.

       /kernel/drv/iwh		 32-bit ELF kernel module (x86).

       /kernel/drv/amd64/iwh	 64-bit ELF kernel module (x86).

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Architecture		     |x86			   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWiwh			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+

SEE ALSO

       dladm(1M), wificonfig(1M), attributes(5), gld(7D), dlpi(7P)

       802.11 - Wireless LAN Media  Access Control  and  Physical Layer Specification- IEEE, 2001.

SunOS 5.11							    26 Aug 2008 							   iwh(7D)