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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.pod | |
| 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.pod')
| -rwxr-xr-x | virt-top/virt-top.pod | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/virt-top/virt-top.pod b/virt-top/virt-top.pod index e11e814..4d7df4e 100755 --- a/virt-top/virt-top.pod +++ b/virt-top/virt-top.pod @@ -369,6 +369,21 @@ Note that in the current implementation, options specified in the init file override options specified on the command line. This is a bug and this behaviour may change in the future. +=head1 NOTES + +=head2 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. + =head1 SEE ALSO L<top(1)>, |