Hi,
On 11/10/2021 12:27 AM, Shaopeng Tan wrote:
From: "Tan, Shaopeng" <tan.shaopeng@xxxxxxxxxxxxxx>
When the Intel Sub-NUMA Clustering(SNC) feature is enabled,
the CMT and MBM counters may not be accurate.
In this case, skip MBM&CMT tests.
Signed-off-by: Shaopeng Tan <tan.shaopeng@xxxxxxxxxxxxxx>
---
Hello,
According to the Intel RDT reference Manual,
when the sub-numa clustering feature is enabled, the CMT and MBM counters may not be accurate.
When running CMT tests and MBM tests on Intel processor, the result is "not ok".
So, fix it to skip the CMT & MBM test When the Intel Sub-NUMA Clustering(SNC) feature is enabled.
It is not clear to me which exact document you refer to but I did find a
RDT reference manual at the link below that describes the problem you
mention:
https://www.intel.com/content/dam/develop/external/us/en/documents/180115-intel-rdtcascadelake-serverreferencemanual-806717.pdf
What is not mentioned in your description is that this is a hardware
errata so the test is expected to fail on these systems and I find that
disabling the test for all systems based on this hardware errata is too
drastic.
Reinette
