Date: Tue, 22 Aug 1995 04:40:56 +0800 (CST) From: jdli@csie.nctu.edu.tw (Chien-Ta Lee) To: freebsd-hackers@FreeBSD.ORG Subject: How to get network traffic ? Message-ID: <199508212041.EAA01661@phoenix.csie.nctu.edu.tw>
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Hi :
Question One :
I am writing a system monitor - xsysinfo, may anyone tell me how
to get my subnet's network traffic ( ?? k/s ) ?
Currently I use this code to get packets come in and out of my host,
how can I get the total load (K/s) about my subnet ?!
getkval(nl[N_IFNET].n_value, (int *) &ifnetaddr, sizeof(ifnetaddr), "_ifnet");
old_packets = packets;
packets.in_out = packets.collisions = 0;
while (ifnetaddr) {
kvm_read(kd, ifnetaddr, &ifnet, sizeof ifnet );
packets.in_out += ((ifnet.if_ipackets + ifnet.if_opackets) >> 2);
packets.collisions += ifnet.if_collisions;
ifnetaddr = (u_long) ifnet.if_next;
}
pkt_in_out = packets.in_out - old_packets.in_out;
collisions = packets.collisions - old_packets.collisions;
(code from xprform++)
Question Two :
What are Active, Inactive, Wired memory displayed by top ?
How to get Total Memory, Used Memory, and Shared Memory ?!
Currently I suspect that
TotalMem = Act + Inact + Wired + Cache + Free
UsedMem = Act + Inact
SharedMem = Wired
Is that correct ?
ps. xsysinfo-0.1 is available at ftp.cdrom.com/pub/FreeBSD/incoming
Thanks a lot.
--
不知何時, FreeBSD 悄悄的溜進了我可愛的小電腦.. 李 建 達 (Adonis) 交大資工
穩穩地生根了下來, 讓我心愛的PC魚躍翻身變成龍.. Mail: jdli@csie.nctu.edu.tw
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