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| author | Richard W.M. Jones <rjones@redhat.com> | 2011-01-06 13:34:16 +0000 |
|---|---|---|
| committer | Richard W.M. Jones <rjones@redhat.com> | 2011-01-06 13:34:16 +0000 |
| commit | 1f3c5a55e0dbbab20fcd23cd81689e0f6ca72669 (patch) | |
| tree | b6cf0318160686997a395c047b4f0b261f33bd27 /virt-top/virt-top.txt | |
| parent | 3d48ff51cf3447943537639dc6c1a9e5dc5120d2 (diff) | |
| download | virt-top-1f3c5a55e0dbbab20fcd23cd81689e0f6ca72669.tar.gz virt-top-1f3c5a55e0dbbab20fcd23cd81689e0f6ca72669.tar.xz virt-top-1f3c5a55e0dbbab20fcd23cd81689e0f6ca72669.zip | |
Document background noise of RX packets from bridges (RHBZ#647987).
For more information see:
https://bugzilla.redhat.com/show_bug.cgi?id=647987#c9
Diffstat (limited to 'virt-top/virt-top.txt')
| -rw-r--r-- | virt-top/virt-top.txt | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/virt-top/virt-top.txt b/virt-top/virt-top.txt index da737b8..de0681e 100644 --- a/virt-top/virt-top.txt +++ b/virt-top/virt-top.txt @@ -269,6 +269,19 @@ INIT FILE file override options specified on the command line. This is a bug and this behaviour may change in the future. +NOTES + NETWORK RX BYTES AND PACKETS + Libvirt/virt-top has no way to know that a packet transmitted to a guest + was received (eg. if the guest is not listening). In the network RX + stats, virt-top reports the packets transmitted to the guest, on the + basis that the guest might receive them. + + In particular this includes broadcast packets. Because of the way that + Linux bridges work, if the guest is connected to a bridge, it will + probably see a steady "background noise" of RX packets even when the + network interface is idle or down. These are caused by STP packets + generated by the bridge. + SEE ALSO top(1), virsh(1), <http://www.libvirt.org/ocaml/>, <http://www.libvirt.org/>, <http://people.redhat.com/~rjones/>, |