[Kernel-packages] [Bug 2042525] Re: mlxbf-pmc: Support 64-bit counter and counting cycles
** Tags removed: verification-needed-jammy-linux-bluefield ** Tags added: verification-done-jammy-linux-bluefield -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-bluefield in Ubuntu. https://bugs.launchpad.net/bugs/2042525 Title: mlxbf-pmc: Support 64-bit counter and counting cycles Status in linux-bluefield package in Ubuntu: Invalid Status in linux-bluefield source package in Jammy: Fix Committed Bug description: SRU Justification: [Impact] Currently, there is no method to keep track of the cycle count when an event is being monitored. And since cycle count increments quickly, the 32-bit counter values could wrap around and hence support for 64-bit counters is also needed for the same. [Fix] Expose 2 additional sysfs entries: count_clock and use_odd_counter. These fields are supported in BlueField-3 PMC hardware and each bit in count_clock corresponds to each counter, while each bit in use_odd_counter corresponds to an even counter.Exposing these fields will allow the user to program any counter of choice to monitor the cycle count for the required duration. Similarly, use_odd_counter can be set to couple 2 adjacent odd and even counters to form a 64-bit counter. [Test Case] 1. Verify that count_clock and use_odd_counter sysfs entries are created for each BlueField-3 HW block. These are not supported by BlueField-1 or BlueField-2 HW. 2. Set any bit in count_clock and check if the corresponding counter values increment after enabling. 3. Set any bit in use_odd_counter and check if the cycle count increments on 2 counters with the odd counter being the lower 32 bits and the even counter being the upper 32 bits. [Regression Potential] Can be considered minimal. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-bluefield/+bug/2042525/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 2042525] Re: mlxbf-pmc: Support 64-bit counter and counting cycles
This bug is awaiting verification that the linux- bluefield/5.15.0-1031.33 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-jammy-linux-bluefield' to 'verification-done-jammy-linux-bluefield'. If the problem still exists, change the tag 'verification-needed-jammy-linux-bluefield' to 'verification-failed-jammy-linux-bluefield'. If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-jammy-linux-bluefield-v2 verification-needed-jammy-linux-bluefield -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-bluefield in Ubuntu. https://bugs.launchpad.net/bugs/2042525 Title: mlxbf-pmc: Support 64-bit counter and counting cycles Status in linux-bluefield package in Ubuntu: Invalid Status in linux-bluefield source package in Jammy: Fix Committed Bug description: SRU Justification: [Impact] Currently, there is no method to keep track of the cycle count when an event is being monitored. And since cycle count increments quickly, the 32-bit counter values could wrap around and hence support for 64-bit counters is also needed for the same. [Fix] Expose 2 additional sysfs entries: count_clock and use_odd_counter. These fields are supported in BlueField-3 PMC hardware and each bit in count_clock corresponds to each counter, while each bit in use_odd_counter corresponds to an even counter.Exposing these fields will allow the user to program any counter of choice to monitor the cycle count for the required duration. Similarly, use_odd_counter can be set to couple 2 adjacent odd and even counters to form a 64-bit counter. [Test Case] 1. Verify that count_clock and use_odd_counter sysfs entries are created for each BlueField-3 HW block. These are not supported by BlueField-1 or BlueField-2 HW. 2. Set any bit in count_clock and check if the corresponding counter values increment after enabling. 3. Set any bit in use_odd_counter and check if the cycle count increments on 2 counters with the odd counter being the lower 32 bits and the even counter being the upper 32 bits. [Regression Potential] Can be considered minimal. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-bluefield/+bug/2042525/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 2042525] Re: mlxbf-pmc: Support 64-bit counter and counting cycles
** Also affects: linux-bluefield (Ubuntu Jammy) Importance: Undecided Status: New ** Changed in: linux-bluefield (Ubuntu) Status: New => Invalid ** Changed in: linux-bluefield (Ubuntu Jammy) Status: New => Fix Committed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-bluefield in Ubuntu. https://bugs.launchpad.net/bugs/2042525 Title: mlxbf-pmc: Support 64-bit counter and counting cycles Status in linux-bluefield package in Ubuntu: Invalid Status in linux-bluefield source package in Jammy: Fix Committed Bug description: SRU Justification: [Impact] Currently, there is no method to keep track of the cycle count when an event is being monitored. And since cycle count increments quickly, the 32-bit counter values could wrap around and hence support for 64-bit counters is also needed for the same. [Fix] Expose 2 additional sysfs entries: count_clock and use_odd_counter. These fields are supported in BlueField-3 PMC hardware and each bit in count_clock corresponds to each counter, while each bit in use_odd_counter corresponds to an even counter.Exposing these fields will allow the user to program any counter of choice to monitor the cycle count for the required duration. Similarly, use_odd_counter can be set to couple 2 adjacent odd and even counters to form a 64-bit counter. [Test Case] 1. Verify that count_clock and use_odd_counter sysfs entries are created for each BlueField-3 HW block. These are not supported by BlueField-1 or BlueField-2 HW. 2. Set any bit in count_clock and check if the corresponding counter values increment after enabling. 3. Set any bit in use_odd_counter and check if the cycle count increments on 2 counters with the odd counter being the lower 32 bits and the even counter being the upper 32 bits. [Regression Potential] Can be considered minimal. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-bluefield/+bug/2042525/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
