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SubjectRe: Speed of the network card
from pcmcia-cs-3.1.22/PCMCIA-HOWTO
4.3.2. Comments about specific cards
o 16-bit PCMCIA cards have a maximum performance of 1.5-2 MB/sec.
That means that any 16-bit 100baseT card (i.e., any card that uses
the pcnet_cs, 3c574_cs, smc91c92_cs, or xirc2ps_cs driver) will
never achieve full 100baseT throughput. Only CardBus network
adapters can fully exploit 100baseT data rates.


Jeff


On Sun, Jan 07, 2001 at 04:30:30AM -0500, Sourav Ghosh wrote:

I would like to determine the banwidth the card is getting from
the network.

/proc/net/dev exports counters; you can monitor those -- I'm sure
there are perfomance program that do exactly this.

For an ethernet, it could be either 10Mbps or 100Mbps, is there
any way of knowing from inside the kernel how much is the
bandwidth the card is actually receiving from the network,
especially when it is capable of getting either 10Mbps or
100Mbps?

The kernel counts packets and bytes; you need to work out bandwidth
in userland from that.


--cw
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