Ubuntu
linux package

Report cpu frequency throttling

Bug #1452547 reported by bugproxy
18
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Fix Released
Medium
Chris J Arges
Vivid
Fix Released
Undecided
Unassigned

Bug Description

[Impact]

== Comment: #0 - Shilpasri G. Bhat <email address hidden> - 2015-05-06 07:24:11 ==
The user can see a drop in performance when frequency is throttled and
is unaware of throttling. So detect and report such a condition, so
the user can check the OCC status to reboot the system or check for
power supply or fan failures.

The cpu frequency can be throttled by OCC for the following reasons:
1)If a processor crosses its power and temperature limit then OCC will
lower its Pmax to reduce the frequency and voltage.
2)If OCC crashes then the system is forced to Psafe frequency.
3)If OCC fails to recover then the kernel is not allowed to do any
 further frequency changes and the chip will remain in Psafe.

[Test Case]
Get into a state where hardware OCC throttles CPU frequency.
Ensure kernel log shows cpufreq throttling messages.

[Fix]

This bug is fixed upstream 09a972d1620934142d30cfda455ffe429af751c4

---uname output---
3.19.0-15

Machine Type = llmtul02b.in.ibm.com

Contact Information = Shilpasri G Bhat / <email address hidden>

See original description

CVE References

Revision history for this message
bugproxy (bugproxy) wrote : 09a972d cpufreq: powernv: Report cpu frequency throttling

Default Comment by Bridge

tags: added: architecture-ppc64le bugnameltc-124690 severity-medium targetmilestone-inin1504
Revision history for this message
Ubuntu Foundations Team Bug Bot (crichton) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1452547/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

tags: added: bot-comment
Sandhya Venugopala (vsandhya)
affects: ubuntu → linux
Brian Murray (brian-murray)
affects: linux → linux (Ubuntu)
tags: added: vivid
Chris J Arges (arges)
Changed in linux (Ubuntu):
assignee: nobody → Chris J Arges (arges)
status: New → In Progress
importance: Undecided → Medium
description: updated
Revision history for this message
Chris J Arges (arges) wrote :

Sent Vivid SRU to ubuntu kernel-team ML. Thanks!

Brad Figg (brad-figg)
Changed in linux (Ubuntu Vivid):
status: New → Fix Committed
Revision history for this message
Launchpad Janitor (janitor) wrote :
Download full text (16.0 KiB)

This bug was fixed in the package linux - 3.19.0-20.20

---------------
linux (3.19.0-20.20) vivid; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
    - LP: #1459957
  * Revert "SAUCE: Call i915_bpo specific functions from the hda driver"
    - LP: #1457369

linux (3.19.0-19.19) vivid; urgency=low

  [ Brad Figg ]

  * Release Tracking Bug
    - LP: #1458964

  [ Duc Dang ]

  * SAUCE: (no-up) [PCIE] APM X-Gene: Remove debug messages in MSI
    interrupt handler path.
    - LP: #1451593

  [ Luis Henriques ]

  * [Config] updateconfigs for 3.19.7 stable update

  [ Paolo Pisati ]

  * [Config] armhf: CPUFREQ_DT=y
    - LP: #1457781
  * annotations: enforce CPUFREQ_DT
    - LP: #1457781

  [ Tanmay Inamdar ]

  * SAUCE: (no-up) Add MSI/MSI-X driver for APM PCI bus
    - LP: #1451593

  [ Timo Aaltonen ]

  * SAUCE: i915_bpo: Rebase to v4.1-rc4.
    - LP: #1456123
  * SAUCE: i915_bpo: Revert dma-buf: cleanup dma_buf_export() to make it
    easily extensible
    - LP: #1456123

  [ Tuan Phan ]

  * SAUCE: (no-up) pci-xgene-msi: fixed deadlock in irq_set_affinity
    - LP: #1451593

  [ Upstream Kernel Changes ]

  * Revert "nfs: replace nfs_add_stats with nfs_inc_stats when add one"
    - LP: #1454699
  * cpufreq: powernv: Report cpu frequency throttling
    - LP: #1452547
  * x86: kvm: Revert "remove sched notifier for cross-cpu migrations"
    - LP: #1450584
  * x86: vdso: fix pvclock races with task migration
    - LP: #1450584
  * ip_forward: Drop frames with attached skb->sk
    - LP: #1454699
  * net: add skb_checksum_complete_unset
    - LP: #1454699
  * ppp: call skb_checksum_complete_unset in ppp_receive_frame
    - LP: #1454699
  * tcp: fix possible deadlock in tcp_send_fin()
    - LP: #1454699
  * tcp: avoid looping in tcp_send_fin()
    - LP: #1454699
  * net: do not deplete pfmemalloc reserve
    - LP: #1454699
  * net: fix crash in build_skb()
    - LP: #1454699
  * pxa168: fix double deallocation of managed resources
    - LP: #1454699
  * net/mlx4_en: Prevent setting invalid RSS hash function
    - LP: #1454699
  * md: fix md io stats accounting broken
    - LP: #1454699
  * x86/asm/decoder: Fix and enforce max instruction size in the insn
    decoder
    - LP: #1454699
  * sched/idle/x86: Restore mwait_idle() to fix boot hangs, to improve
    power savings and to improve performance
    - LP: #1454699
  * sched/idle/x86: Optimize unnecessary mwait_idle() resched IPIs
    - LP: #1454699
  * perf/x86/intel: Fix Core2,Atom,NHM,WSM cycles:pp events
    - LP: #1454699
  * KVM: x86: Fix MSR_IA32_BNDCFGS in msrs_to_save
    - LP: #1454699
  * Btrfs: fix log tree corruption when fs mounted with -o discard
    - LP: #1454699
  * btrfs: don't accept bare namespace as a valid xattr
    - LP: #1454699
  * Btrfs: fix inode eviction infinite loop after cloning into it
    - LP: #1454699
  * Btrfs: fix inode eviction infinite loop after extent_same ioctl
    - LP: #1454699
  * usb: gadget: printer: enqueue printer's response for setup request
    - LP: #1454699
  * KVM: s390: fix handling of write errors in the tpi handler
    - LP: #1454699
  * KVM: s390: reinjection of irqs can fail in the tpi handler
    - LP: #1454699
  * KVM:...

Changed in linux (Ubuntu):
status: In Progress → Fix Released
Revision history for this message
Luis Henriques (henrix) wrote :

This bug is awaiting verification that the 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-vivid' to 'verification-done-vivid'.

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: verification-needed-vivid
Breno Leitão (breno-leitao)
tags: added: verification-done-vivid
removed: verification-needed-vivid
Revision history for this message
bugproxy (bugproxy) wrote : Comment bridged from LTC Bugzilla

------- Comment From <email address hidden> 2015-06-04 06:42 EDT-------
Shilpasri G. Bhat 2015-06-03 14:34:03 EDT

Verified on vivid-3.19.0-20.20. The driver reports frequency throttling on an OCC reset.

Thank you,
Shilpa

Revision history for this message
Launchpad Janitor (janitor) wrote :
Download full text (16.0 KiB)

This bug was fixed in the package linux - 3.19.0-20.20

---------------
linux (3.19.0-20.20) vivid; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
    - LP: #1459957
  * Revert "SAUCE: Call i915_bpo specific functions from the hda driver"
    - LP: #1457369

linux (3.19.0-19.19) vivid; urgency=low

  [ Brad Figg ]

  * Release Tracking Bug
    - LP: #1458964

  [ Duc Dang ]

  * SAUCE: (no-up) [PCIE] APM X-Gene: Remove debug messages in MSI
    interrupt handler path.
    - LP: #1451593

  [ Luis Henriques ]

  * [Config] updateconfigs for 3.19.7 stable update

  [ Paolo Pisati ]

  * [Config] armhf: CPUFREQ_DT=y
    - LP: #1457781
  * annotations: enforce CPUFREQ_DT
    - LP: #1457781

  [ Tanmay Inamdar ]

  * SAUCE: (no-up) Add MSI/MSI-X driver for APM PCI bus
    - LP: #1451593

  [ Timo Aaltonen ]

  * SAUCE: i915_bpo: Rebase to v4.1-rc4.
    - LP: #1456123
  * SAUCE: i915_bpo: Revert dma-buf: cleanup dma_buf_export() to make it
    easily extensible
    - LP: #1456123

  [ Tuan Phan ]

  * SAUCE: (no-up) pci-xgene-msi: fixed deadlock in irq_set_affinity
    - LP: #1451593

  [ Upstream Kernel Changes ]

  * Revert "nfs: replace nfs_add_stats with nfs_inc_stats when add one"
    - LP: #1454699
  * cpufreq: powernv: Report cpu frequency throttling
    - LP: #1452547
  * x86: kvm: Revert "remove sched notifier for cross-cpu migrations"
    - LP: #1450584
  * x86: vdso: fix pvclock races with task migration
    - LP: #1450584
  * ip_forward: Drop frames with attached skb->sk
    - LP: #1454699
  * net: add skb_checksum_complete_unset
    - LP: #1454699
  * ppp: call skb_checksum_complete_unset in ppp_receive_frame
    - LP: #1454699
  * tcp: fix possible deadlock in tcp_send_fin()
    - LP: #1454699
  * tcp: avoid looping in tcp_send_fin()
    - LP: #1454699
  * net: do not deplete pfmemalloc reserve
    - LP: #1454699
  * net: fix crash in build_skb()
    - LP: #1454699
  * pxa168: fix double deallocation of managed resources
    - LP: #1454699
  * net/mlx4_en: Prevent setting invalid RSS hash function
    - LP: #1454699
  * md: fix md io stats accounting broken
    - LP: #1454699
  * x86/asm/decoder: Fix and enforce max instruction size in the insn
    decoder
    - LP: #1454699
  * sched/idle/x86: Restore mwait_idle() to fix boot hangs, to improve
    power savings and to improve performance
    - LP: #1454699
  * sched/idle/x86: Optimize unnecessary mwait_idle() resched IPIs
    - LP: #1454699
  * perf/x86/intel: Fix Core2,Atom,NHM,WSM cycles:pp events
    - LP: #1454699
  * KVM: x86: Fix MSR_IA32_BNDCFGS in msrs_to_save
    - LP: #1454699
  * Btrfs: fix log tree corruption when fs mounted with -o discard
    - LP: #1454699
  * btrfs: don't accept bare namespace as a valid xattr
    - LP: #1454699
  * Btrfs: fix inode eviction infinite loop after cloning into it
    - LP: #1454699
  * Btrfs: fix inode eviction infinite loop after extent_same ioctl
    - LP: #1454699
  * usb: gadget: printer: enqueue printer's response for setup request
    - LP: #1454699
  * KVM: s390: fix handling of write errors in the tpi handler
    - LP: #1454699
  * KVM: s390: reinjection of irqs can fail in the tpi handler
    - LP: #1454699
  * KVM:...

Changed in linux (Ubuntu Vivid):
status: Fix Committed → Fix Released
To post a comment you must log in.
This report contains Public information  
Everyone can see this information.

Duplicates of this bug

Subscribing...

Other bug subscribers

Remote bug watches

Bug watches keep track of this bug in other bug trackers.