** Description changed: [Impact] perf support for the ARMv8.2 Statistical Profiling Extension does not work on ACPI platforms. [Test Case] ubuntu@d06-2:~$ sudo perf record -e arm_spe/ts_enable=1,pa_enable=1/ dd if=/dev/zero of=/dev/null count=10000 10000+0 records in 10000+0 records out 5120000 bytes (5.1 MB, 4.9 MiB) copied, 0.0201586 s, 254 MB/s [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 1.354 MB perf.data ] ubuntu@d06-2:~$ sudo perf report --dump-raw-trace [...] 0 0 0x4a90 [0x30]: PERF_RECORD_AUXTRACE size: 0x155fd0 offset: 0 ref: 0x226974 . . ... ARM SPE data: size 1400784 bytes . 00000000: b0 28 31 25 10 00 00 ff c0 PC 0xff00001025312 . 00000009: 99 07 00 LAT 7 ISSUE . 0000000c: 98 09 00 LAT 9 TOT . 0000000f: 52 16 00 EV RETIRED L1D-ACC [...] [Fix] d482e575fbf0f perf: arm_spe: Enable ACPI/Platform automatic module loading d24a0c7099b32 arm_pmu: acpi: spe: Add initial MADT/SPE probing 56855a99f3d0d ACPI/PPTT: Add function to return ACPI 6.3 Identical tokens ed2b664fcc807 ACPI/PPTT: Modify node flag detection to find last IDENTICAL [Regression Risk] - - - [Regression Risk] + The functional changes are all ARM specific (while ACPI PPTT is generic, it is only enabled under arch/arm64 currently). There are new macros and an updated structure in generic code, but all pretty innocuous.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1841490 Title: ACPI support for the ARMv8.2 Statistical Profiling Extension To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1841490/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
