Hi Ernest,

we have similar issues with IPoIB. To fix it we use VDSM hooks:

# cat /usr/libexec/vdsm/hooks/before_vdsm_start/network.sh

...

ethtool -K ib0 tso off 2>/dev/null

ethtool -K ib1 tso off 2>/dev/null

...

Nevertheless this is similar to running self defined init scripts.

But at least I have a well defined location to put those fixes into.

Best regards.

Markus

Von: users-bounces(a)ovirt.org [users= -bounc=3D es(a)ovirt.org]" im Auftrag von "Ernest Beinrohr [Ernest.Beinrohr= (a)a=3D xonpro.sk]
Gesendet: Mittwoch, 19. November 2014 13:27
An: users
Betreff: [ovirt-users] disabling generic-receive-offload (gro) and l= =3D arge-receive-offload ?

Hi, is there a way of setting eth parameters for hypervisors? My freeb= =3D sd instance has terrible performance when these are enabled. Currently I ru= =3D n these on all hypervisors manually.

ethtool =3D96K vnet0 gro off=3D0A=3D
ethtool =3D96K vnet2 gro off=3D0A=3D
ethtool =3D96K vnet0 lro off=3D0A=3D
ethtool =3D96K vnet2 lro off

as per: http://support.citrix.com/proddocs/topic/netscaler-vpx-10-5/ns-vpx-install-= =3D prereqkvm-ref.html

Ernest Beinrohr, = =3D AXON PRO
Ing, RHCE, RHCVA, LPIC, VCA,
+421-2-62410360 +421-903-482603

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