Hello bugproxy, or anyone else affected, Accepted s390-tools-signed into plucky-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/s390-tools- signed/2.37.0-0ubuntu2.1 in a few hours, and then in the -proposed repository.
Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users. If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed- plucky to verification-done-plucky. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification- failed-plucky. In either case, without details of your testing we will not be able to proceed. Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping! N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days. ** Changed in: s390-tools-signed (Ubuntu Noble) Status: Triaged => Fix Committed -- You received this bug notification because you are a member of Debcrafters packages, which is subscribed to s390-tools in Ubuntu. https://bugs.launchpad.net/bugs/2103414 Title: [25.04 FEAT] [post announcement] [KRN2304] CPU-MF Counters for new IBM Z hardware - s390-tools part Status in Ubuntu on IBM z Systems: In Progress Status in s390-tools package in Ubuntu: Fix Released Status in s390-tools-signed package in Ubuntu: Fix Released Status in s390-tools source package in Noble: Fix Committed Status in s390-tools-signed source package in Noble: Fix Committed Status in s390-tools source package in Plucky: Fix Committed Status in s390-tools-signed source package in Plucky: Fix Committed Status in s390-tools source package in Questing: Fix Released Status in s390-tools-signed source package in Questing: Fix Released Bug description: [ Impact ] * A new IBM Z hardware generation (z17) was recently introduced. * Hence s390-tools' libutil needs to be aware of the new hardware name (z17, z17_2) and it's new type(s) (9175, 9176) to be able to identify and map type to name and vice versa. * This is especially needed to map new CPU management facility (MF) hardware counters to the correct hardware name and type. * Without patching, new z17 hw, i.e. if referenced in CPU MF (or other cases) by it's new machine type, would be reported by libutils as "Unknown machine type". [ Test Plan ] * Prepare an IBM z17 LPAR with Ubuntu 25.04 (incl. this s390-tools patch and the commit above for the kernel). * At LPARs activation profile, navigate to the Security page and within the counter facility options, select each counter set you want to use. (One may just select all for testing purposes.) * Use 'perf list' to determine if the new counters are listed. (Cmd 'ls -l /sys/devices/cpum_cf/events | wc -l' needs to report 106 on z17.) * For comparing the new counters (and their names) see: dc7cafd91cba ("s390/cpumf: Update CPU Measurement facility extended counter set support") https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/\ plucky/commit/?h=master-next&id=dc7cafd91cba63b200f33ced7530b1d76a2b5495 * Use 'perf stat -e <counter>' to enable and make use of these counters. * In addition to the more end to end test above, a proper machine identification can be done using the lscpumf tool (that uses lbutils): - libutils is a static library (.a) used by lscpumf. If 'lscpumf -C' is used to list all counters that are provided by the underlying IBM Z hardware generation, it will list the identified hardware in the first row (mapped from its type number, obtained from /proc/sysinfo 'Type:' field): - $ lscpumf -C | head -1 perf event counter list for IBM z17 - The complete output of 'lscpumf -C' should then contain all the new counters that are now available for the new hardware generation (see above kernel commit dc7cafd91cba). [ Fix ] * b3db52fd165e6a26d9c73e51bd5322b55017ef94 ("libutil: Add machine type definition for machines 9175 and 9176") * Nobel misses the type for an intermediate/updated model ('Z16_A02' on top of Z16) thus I'm adding this first (needed for noble only) as a pre-requirement. ef1799f31fa2a11467373077058b8b5a3838c4b1 ("s390-tools/libutil: Add machine type 3932") [ Where problems could occur ] * The patch is pretty straight forward, but there can always be problems, be it a 'slip of the pen' or a typo, with that: * The names or type information could be wrong, which could lead to an incorrect identification (or not identification) of a z17 system. * The new case statements might not be inserted correctly or not correctly closed/terminated, which might lead again to an incorrect identification or to "Unknown machine type". * The above could again lead to: - incorrect event exposure on unsupported hardware - invalid perf measurements - sysfs inconsistencies - or warnings due to misconfigured or non-existent counters * Only new code is added by this commit - none is changed nor removed. * These CPU MF counters and their handling is unique to s390x, hence no other architectures are be affected. [ Other Info ] * The CPU MF hw counters themselves are part of the kernel: dc7cafd91cba ("s390/cpumf: Update CPU Measurement facility extended counter set support") and are handled in kernel SRU LP#2114258. * Hence there is no harm to have the support in s390-tools before having in the kernel, since in this case the new type info will just not be used. In case the kernel has support first and libutils is used, libutil will report "Unknown machine type". __________ Feature Description: Support for CPU-MF counters of new IBM Z hardware in kernel, s390-tools, perf (kernel) and libpfm4. This part covers the s390-tools changes to lscpumf and libutil. The related patches / commit IDs will be provided as soon as the required information has been publicly disclosed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/2103414/+subscriptions -- Mailing list: https://launchpad.net/~debcrafters-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~debcrafters-packages More help : https://help.launchpad.net/ListHelp
