Re: [PATCH] i386: pass CLZERO to guests with EPYC CPU model on AMD ZEN platform

[Babu Moger]

On 2/5/20 11:53 PM, Ani Sinha wrote:
> 
> 
>> On Feb 6, 2020, at 11:16 AM, Ani Sinha <ani.si...@nutanix.com> wrote:
>>
>>
>>
>>> On Feb 6, 2020, at 5:30 AM, Moger, Babu <babu.mo...@amd.com> wrote:
>>>
>>> Ani, I am already working on it.
>>
>> Wow, I see a whole new AMD-Rome CPU model with it’s own cache info data : 
>>
>> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fqemu-devel%2F157314966312.23828.17684821666338093910.stgit%40naples-babu.amd.com%2F&amp;data=02%7C01%7CBabu.Moger%40amd.com%7Cc566dc5cf3cc407b5ee608d7aac8d9bc%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637165651955089264&amp;sdata=tlafWD6m5%2BZ12cqd4vqJcWh0%2FIgly%2FPVMgAbjxK5Mog%3D&amp;reserved=0
> 
> Do you think the ROME specific guest cpu cache data will have significant 
> impact on performance?

I have not done performance benchmarks myself. Yes. Rome is expected to
perform better than its previous generations.