Re: [PATCH RFC V11 15/18] kvm : Paravirtual ticketlocks support for linux guests running on KVM hypervisor

[Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>]

On 08/01/2013 02:34 PM, Raghavendra K T wrote:
> On 08/01/2013 01:15 PM, Gleb Natapov wrote:
>>> Shall I consider this as an ack for kvm part?
>>>
>> For everything except 18/18. For that I still want to see numbers. But
>> 18/18 is pretty independent from the reset of the series so it should
>> not stop the reset from going in.
>
> Yes. agreed.
> I am going to evaluate patch 18 separately and come with results for
> that. Now we can consider only 1-17 patches.
>

Gleb,

32 core machine with HT off 32 vcpu guests.
base = 3.11-rc + patch 1 -17 pvspinlock_v11
patched = base + patch 18

+-----------+-----------+-----------+------------+-----------+
                   dbench  (Throughput in MB/sec higher is better)
+-----------+-----------+-----------+------------+-----------+
       base      stdev       patched    stdev       %improvement
+-----------+-----------+-----------+------------+-----------+
1x 14584.3800   146.9074   14705.1000   163.1060     0.82773
2x  1713.7300    32.8750    1717.3200    45.5979     0.20948
3x   967.8212    42.0257     971.8855    18.8532     0.41994
4x   685.2764    25.7150     694.5881     8.3907     1.35882
+-----------+-----------+-----------+------------+-----------+

I saw -0.78% - .84% changes in ebizzy and 1-2% improvement in
hackbench.