[lkml]   [2015]   [May]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH V2 net-next 1/1] hv_netvsc: Properly size the vrss queues
From: "K. Y. Srinivasan" <>
Date: Wed, 27 May 2015 13:16:57 -0700

> The current algorithm for deciding on the number of VRSS channels is
> not optimal since we open up the min of number of CPUs online and the
> number of VRSS channels the host is offering. So on a 32 VCPU guest
> we could potentially open 32 VRSS subchannels. Experimentation has
> shown that it is best to limit the number of VRSS channels to the number
> of CPUs within a NUMA node.
> Here is the new algorithm for deciding on the number of sub-channels we
> would open up:
> 1) Pick the minimum of what the host is offering and what the driver
> in the guest is specifying as the default value.
> 2) Pick the minimum of (1) and the numbers of CPUs in the NUMA
> node the primary channel is bound to.
> Signed-off-by: K. Y. Srinivasan <>

Applied, thanks.

 \ /
  Last update: 2015-05-31 03:21    [W:0.032 / U:56.480 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site