"Michael S. Tsirkin" <mst@xxxxxxxxxx> wrote on 12/08/2014 12:18:50 PM: > From: "Michael S. Tsirkin" <mst@xxxxxxxxxx> > To: David Miller <davem@xxxxxxxxxxxxx> > Cc: Razya Ladelsky/Haifa/IBM@IBMIL, kvm@xxxxxxxxxxxxxxx, Alex > Glikson/Haifa/IBM@IBMIL, Eran Raichstein/Haifa/IBM@IBMIL, Yossi > Kuperman1/Haifa/IBM@IBMIL, Joel Nider/Haifa/IBM@IBMIL, > abel.gordon@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, > netdev@xxxxxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx > Date: 12/08/2014 12:18 PM > Subject: Re: [PATCH] vhost: Add polling mode > > On Mon, Aug 11, 2014 at 12:46:21PM -0700, David Miller wrote: > > From: "Michael S. Tsirkin" <mst@xxxxxxxxxx> > > Date: Sun, 10 Aug 2014 21:45:59 +0200 > > > > > On Sun, Aug 10, 2014 at 11:30:35AM +0300, Razya Ladelsky wrote: > > ... > > > And, did your tests actually produce 100% load on both host CPUs? > > ... > > > > Michael, please do not quote an entire patch just to ask a one line > > question. > > > > I truly, truly, wish it was simpler in modern email clients to delete > > the unrelated quoted material because I bet when people do this they > > are simply being lazy. > > > > Thank you. > > Lazy - mea culpa, though I'm using mutt so it isn't even hard. > > The question still stands: the test results are only valid > if CPU was at 100% in all configurations. > This is the reason I generally prefer it when people report > throughput divided by CPU (power would be good too but it still > isn't easy for people to get that number). > Hi Michael, Sorry for the delay, had some problems with my mailbox, and I realized just now that my reply wasn't sent. The vm indeed ALWAYS utilized 100% cpu, whether polling was enabled or not. The vhost thread utilized less than 100% (of the other cpu) when polling was disabled. Enabling polling increased its utilization to 100% (in which case both cpus were 100% utilized). > -- > MST > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
