[linus:master] [perf/x86] 88ec7eedbb: kvm-unit-tests.pmu_lbr.fail

[linus:master] [perf/x86] 88ec7eedbb: kvm-unit-tests.pmu_lbr.fail

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 1430 bytes --]



Hello,

kernel test robot noticed "kvm-unit-tests.pmu_lbr.fail" on:

commit: 88ec7eedbbd21cad38707620ad6c48a4e9a87c18 ("perf/x86: Fix low freqency setting issue")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

[test failed on linus/master      0a87d6bb6fd274cde3bf217a821153714374198f]
[test failed on linux-next/master fefb886b1344e222b3218f3c0165b0fd770e8b88]

in testcase: kvm-unit-tests
version: kvm-unit-tests-x86_64-69574079-1_20250322
with following parameters:


config: x86_64-rhel-9.4-func
compiler: gcc-12
test machine: 8 threads 1 sockets Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz (Haswell) with 8G memory

(please refer to attached dmesg/kmsg for entire log/backtrace)


If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202504071232.3c2fa7d5-lkp@intel.com


...
^[[32mPASS^[[0m pmu (143 tests, 14 skipped)
^[[31mFAIL^[[0m pmu_lbr (2 tests, 1 unexpected failures)   <---
^[[33mSKIP^[[0m pmu_pebs (1 tests, 1 skipped)
...


one log is attached.


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250407/202504071232.3c2fa7d5-lkp@intel.com



-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki


[-- Attachment #2: pmu_lbr.log --]
[-- Type: text/plain, Size: 560 bytes --]

timeout -k 1s --foreground 90s /usr/bin/qemu-system-x86_64 --no-reboot -nodefaults -device pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device pci-testdev -machine accel=kvm -kernel x86/pmu_lbr.flat -smp 1 -cpu host,migratable=no # -initrd /tmp/tmp.1JDHego9zM
enabling apic
smp: waiting for 0 APs
paging enabled
cr0 = 80010011
cr3 = 1007000
cr4 = 20
PMU version:		 2
LBR version:		 4
PASS: The number of guest LBR entries is good.
FAIL: The guest LBR FROM_IP/TO_IP values are good.
SUMMARY: 2 tests, 1 unexpected failures

Re: [linus:master] [perf/x86] 88ec7eedbb: kvm-unit-tests.pmu_lbr.fail

[Liang, Kan]

On 2025-04-07 1:07 a.m., kernel test robot wrote:
> 
> 
> Hello,
> 
> kernel test robot noticed "kvm-unit-tests.pmu_lbr.fail" on:
> 
> commit: 88ec7eedbbd21cad38707620ad6c48a4e9a87c18 ("perf/x86: Fix low freqency setting issue")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> 
> [test failed on linus/master      0a87d6bb6fd274cde3bf217a821153714374198f]
> [test failed on linux-next/master fefb886b1344e222b3218f3c0165b0fd770e8b88]
> 
> in testcase: kvm-unit-tests
> version: kvm-unit-tests-x86_64-69574079-1_20250322
> with following parameters:

The one line patch only impacts the perf record.
But the test case is for LBR on KVM. The case directly access the
IA32_DEBUGCTLMSR to enable/disable LBRs. There is nothing related.
It is probably a false alarm.

+ Dapeng

Could you please take a look at the qemu test case?

Thanks,
Kan>
> 
> config: x86_64-rhel-9.4-func
> compiler: gcc-12
> test machine: 8 threads 1 sockets Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz (Haswell) with 8G memory
> 
> (please refer to attached dmesg/kmsg for entire log/backtrace)
> 
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <oliver.sang@intel.com>
> | Closes: https://lore.kernel.org/oe-lkp/202504071232.3c2fa7d5-lkp@intel.com
> 
> 
> ...
> ^[[32mPASS^[[0m pmu (143 tests, 14 skipped)
> ^[[31mFAIL^[[0m pmu_lbr (2 tests, 1 unexpected failures)   <---
> ^[[33mSKIP^[[0m pmu_pebs (1 tests, 1 skipped)
> ...
> 
> 
> one log is attached.
> 
> 
> The kernel config and materials to reproduce are available at:
> https://download.01.org/0day-ci/archive/20250407/202504071232.3c2fa7d5-lkp@intel.com
> 
> 
> 

Re: [linus:master] [perf/x86] 88ec7eedbb: kvm-unit-tests.pmu_lbr.fail

[Mi, Dapeng]

On 4/7/2025 10:38 PM, Liang, Kan wrote:
>
> On 2025-04-07 1:07 a.m., kernel test robot wrote:
>>
>> Hello,
>>
>> kernel test robot noticed "kvm-unit-tests.pmu_lbr.fail" on:
>>
>> commit: 88ec7eedbbd21cad38707620ad6c48a4e9a87c18 ("perf/x86: Fix low freqency setting issue")
>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
>>
>> [test failed on linus/master      0a87d6bb6fd274cde3bf217a821153714374198f]
>> [test failed on linux-next/master fefb886b1344e222b3218f3c0165b0fd770e8b88]
>>
>> in testcase: kvm-unit-tests
>> version: kvm-unit-tests-x86_64-69574079-1_20250322
>> with following parameters:
> The one line patch only impacts the perf record.
> But the test case is for LBR on KVM. The case directly access the
> IA32_DEBUGCTLMSR to enable/disable LBRs. There is nothing related.
> It is probably a false alarm.
>
> + Dapeng
>
> Could you please take a look at the qemu test case?

Sure. I would investigate it later.


>
> Thanks,
> Kan>
>> config: x86_64-rhel-9.4-func
>> compiler: gcc-12
>> test machine: 8 threads 1 sockets Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz (Haswell) with 8G memory
>>
>> (please refer to attached dmesg/kmsg for entire log/backtrace)
>>
>>
>> If you fix the issue in a separate patch/commit (i.e. not just a new version of
>> the same patch/commit), kindly add following tags
>> | Reported-by: kernel test robot <oliver.sang@intel.com>
>> | Closes: https://lore.kernel.org/oe-lkp/202504071232.3c2fa7d5-lkp@intel.com
>>
>>
>> ...
>> ^[[32mPASS^[[0m pmu (143 tests, 14 skipped)
>> ^[[31mFAIL^[[0m pmu_lbr (2 tests, 1 unexpected failures)   <---
>> ^[[33mSKIP^[[0m pmu_pebs (1 tests, 1 skipped)
>> ...
>>
>>
>> one log is attached.
>>
>>
>> The kernel config and materials to reproduce are available at:
>> https://download.01.org/0day-ci/archive/20250407/202504071232.3c2fa7d5-lkp@intel.com
>>
>>
>>