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Bug
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Resolution: Done-Errata
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Undefined
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rhel-9.3.0.z
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None
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intel-cmt-cat-23.11-1.el9
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None
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None
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rhel-sst-kernel-ft
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ssg_core_kernel
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4
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False
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None
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Red Hat Enterprise Linux
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None
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None
What were you trying to do that didn't work?
I've used
RDT_PROBE_MSR=1 pqos -v -d
in order to detect Intel Cache Allocation Technology (CAT) support on a Intel® Core(TM) i7-1185GRE Tiger Lake UP3, but it failed detecting the model-specific L3 CAT.
Please provide the package NVR for which bug is seen:
intel-cmt-cat-4.1.0-3.el9.x86_64
How reproducible:
Use a Intel HW with model-specific L3 CAT support, one of the following list:
| Intel Atom® x6200FE Processor |
| Intel Atom® x6212RE Processor |
| Intel Atom® X6214RE Processor |
| Intel Atom® x6414RE Processor |
| Intel Atom® X6416RE Processor |
| Intel Atom® x6425RE Processor |
| Intel Atom® x6427FE Processor |
| Intel Atom® x7211E Processor |
| Intel Atom® x7213E Processor |
| Intel Atom® x7425E Processor |
| Intel® Core™ i3-1115GRE Processor |
| Intel® Core™ i5-1145GRE Processor |
| Intel® Core™ i5-12500E Processor |
| Intel® Core™ i7-1185GRE Processor |
| Intel® Core™ i7-12700E Processor |
| Intel® Core™ i9-12900E Processor |
| Intel® Xeon® W Processors |
| Intel® Xeon® W-11155MLE Processor |
| Intel® Xeon® W-11155MRE Processor |
| Intel® Xeon® W-11555MLE Processor |
| Intel® Xeon® W-11555MRE Processor |
| Intel® Xeon® W-11865MLE Processor |
| Intel® Xeon® W-11865MRE Processor |
Steps to reproduce
- install the intel-cmt-cat package
- RDT_PROBE_MSR=1 pqos -v -d
Expected results
NOTE: Mixed use of MSR and kernel interfaces to manage CAT or CMT & MBM may lead to unexpected behavior. INFO: Requested interface: AUTO INFO: Selected interface: MSR INFO: CACHE: type 1, level 1, max id sharing this cache 2 (1 bits) INFO: CACHE: type 2, level 1, max id sharing this cache 2 (1 bits) INFO: CACHE: type 3, level 2, max id sharing this cache 2 (1 bits) INFO: CACHE: type 3, level 3, max id sharing this cache 16 (4 bits) WARN: CPUID.0x7.0: Monitoring capability not supported! INFO: Monitoring capability not detected INFO: CPUID.0x10.0: L3 CAT not detected. INFO: CPUID.0x10.0: L3 CAT not detected. Checking brand string... INFO: Cache allocation detected for model name '11th Gen Intel(R) Core(TM) i7-1185GRE @ 2.80GHz' WARN: Detected model specific non-architectural features (L3 CAT). Intel recommends validating that the feature provides the performance necessary for your use-case. Non-architectural features may not behave as expected in all scenarios. INFO: L3CA capability detected INFO: L3 CAT details: CDP support=0, CDP on=0, #COS=4, #ways=12, ways contention bit-mask 0x0 INFO: L3 CAT details: cache size 12582912 bytes, way size 1048576 bytes INFO: L3 CAT details: I/O RDT support=0, I/O RDT on=0 INFO: L2 CDP is disabled INFO: L2CA capability detected INFO: L2 CAT details: CDP support=1, CDP on=0, #COS=8, #ways=20, ways contention bit-mask 0x0 INFO: L2 CAT details: cache size 1310720 bytes, way size 65536 bytes INFO: CPUID.0x7.0: CORE_CAPABILITIES MSR (0xCF) available INFO: CPUID 0x10.0: MBA not supported! INFO: MBA capability not detected Hardware capabilities Allocation Cache Allocation Technology (CAT) L3 CAT CDP: unsupported Non-Contiguous CBM: unsupported I/O RDT: unsupported Num COS: 4 L2 CAT CDP: disabled Non-Contiguous CBM: unsupported Num COS: 8
Actual results
NOTE: Mixed use of MSR and kernel interfaces to manage CAT or CMT & MBM may lead to unexpected behavior. INFO: CACHE: type 1, level 1, max id sharing this cache 2 (1 bits) INFO: CACHE: type 2, level 1, max id sharing this cache 2 (1 bits) INFO: CACHE: type 3, level 2, max id sharing this cache 2 (1 bits) INFO: CACHE: type 3, level 3, max id sharing this cache 16 (4 bits) WARN: CPUID.0x7.0: Monitoring capability not supported! INFO: Monitoring capability not detected INFO: CPUID.0x7.0: L3 CAT supported INFO: CPUID.0x10.0: L3 CAT not detected. INFO: L3CA capability not detected INFO: L2 CDP is disabled INFO: L2CA capability detected INFO: L2 CAT details: CDP support=1, CDP on=0, #COS=8, #ways=20, ways contention bit-mask 0x0 INFO: L2 CAT details: cache size 1310720 bytes, way size 65536 bytes INFO: CPUID 0x10.0: MBA not supported! INFO: MBA capability not detected Hardware capabilities Allocation Cache Allocation Technology (CAT) L2 CAT CDP: disabled Num COS: 8
- links to
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RHEA-2024:128171
intel-cmt-cat bug fix and enhancement update
