Using Fedora Core:6,X64 arc.

The ethernet card make is "Intel" & "SIS".

I need to check the default buffer size of both ethernet cards? So,please let me know where to check the buffer size of it in linux OS.

I have one path which is known by everyone. i.e.

/etc/sysconfig/hwconf

Any suggesions?

Waiting.

Du you want "cat /proc/sys/net/core/rmem_max" ???

thanks for giving me answer , this is the system side buffer ineed NIC buffer details.
my self bhrugu and i am persuing my master in comp engg , associated with research work for the telecom company .

my topic is dealing with RTP packets which gives me moer interrupts and that reduce the performance of my server.
i have to enhance in NIC and kernel for the performance improvements
i am looking for changes in the ethernet driver e1000 parameters and the ultimate goal is to interrupt reduction in my system

i have got problem with the ethtool -C eth0
the error is showing that Coalesce parameters for eth1:
Cannot get device coalesce settings: No such device

eth0 is existing interface?

use the command "ifconfig" to see ur interface names.

yes the etho is exist and functioning all other thing that is there.

[root@ddit-cgl ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:16:17:49:41:98
inet addr:192.168.1.8 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::216:17ff:fe49:4198/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:90064 errors:0 dropped:0 overruns:0 frame:0
TX packets:16823 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:13042482 (12.4 MiB) TX bytes:1963565 (1.8 MiB)
Interrupt:233 Base address:0xe000

eth2 Link encap:Ethernet HWaddr 00:07:E9:0A:1B:56
inet addr:192.168.1.38 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::207:e9ff:fe0a:1b56/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:267 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:10
RX bytes:0 (0.0 b) TX bytes:21134 (20.6 KiB)
Base address:0xb800 Memory:fbfa0000-fbfc0000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:2887 errors:0 dropped:0 overruns:0 frame:0
TX packets:2887 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:7973005 (7.6 MiB) TX bytes:7973005 (7.6 MiB)

i have no idea about all this - can you explain a little? a "buffer" *for* what? what gets stored in it?

i need to tune the coalescing parametere of the NIC dvice driver that ,if i get the buffer size then we can tune the no of packets in buufer persecond (n0 of interrupts generated should be tuned ).

so if buffersize is 86k for example then that much packets we receive and that many interrupts generated so the we can reduce interrrupt by collecting many packets and fired interrupts (coaelscing).

plz help me to find the NIC buffer size for the nvdia 56 driver with default driver forcedeth