[Kernel-packages] [Bug 1489622] Re: 15.10 20150826 snapshot -- MacBookPro3, 1 has high load (and temperature) despite low CPU and low IO

Comparing the commit log for driver/acpi changes between 3.17 and 3.18-rc1, I notice this commit standing out as the most likely related commit: commit 9faf6136ff4647452580b019f4b16f8c5082e589 Author: Matthew Garrett Date: Sat Sep 20 13:19:46 2014 +0200 ACPI /

[Kernel-packages] [Bug 1489622] Re: 15.10 20150826 snapshot -- MacBookPro3, 1 has high load (and temperature) despite low CPU and low IO

v3.16.7-ck16-utopic and v3.17.8-vivid do not contain the issue. v3.18-rc1-utopic contains the issue. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1489622 Title: 15.10 20150826

[Kernel-packages] [Bug 1489622] Re: 15.10 20150826 snapshot -- MacBookPro3, 1 has high load (and temperature) despite low CPU and low IO

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.2 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix

[Kernel-packages] [Bug 1489622] Re: 15.10 20150826 snapshot -- MacBookPro3, 1 has high load (and temperature) despite low CPU and low IO

Will do. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1489622 Title: 15.10 20150826 snapshot -- MacBookPro3,1 has high load (and temperature) despite low CPU and low IO Status in

[Kernel-packages] [Bug 1489622] Re: 15.10 20150826 snapshot -- MacBookPro3, 1 has high load (and temperature) despite low CPU and low IO

The issue persists with the current 4.2 build. ** Tags added: kernel-bug-exists-upstream -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1489622 Title: 15.10 20150826 snapshot --

[Kernel-packages] [Bug 1489622] Re: 15.10 20150826 snapshot -- MacBookPro3, 1 has high load (and temperature) despite low CPU and low IO

I don't see this issue on the 12.04.5 Live CD (3.13.0-32-generic kernel) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1489622 Title: 15.10 20150826 snapshot -- MacBookPro3,1 has high

[Kernel-packages] [Bug 1489622] Re: 15.10 20150826 snapshot -- MacBookPro3, 1 has high load (and temperature) despite low CPU and low IO

** Changed in: linux (Ubuntu) Importance: Undecided = Low ** Changed in: linux (Ubuntu) Importance: Low = Undecided ** Changed in: linux (Ubuntu) Importance: Undecided = High -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to

[Kernel-packages] [Bug 1489622] Re: 15.10 20150826 snapshot -- MacBookPro3, 1 has high load (and temperature) despite low CPU and low IO

I wonder if it is ACPI related: $ uptime cat /sys/firmware/acpi/interrupts/gpe17 16:22:48 up 0 min, 1 user, load average: 2.26, 0.74, 0.26 376509 enabled that's a lot of interrupts for a system that has been up less than a minute. -- You received this bug notification because you are a

[Kernel-packages] [Bug 1489622] Re: 15.10 20150826 snapshot -- MacBookPro3, 1 has high load (and temperature) despite low CPU and low IO

Although even with gpe17, I'm still seeing the load average around 1.25 with perf reporting a lot of time in acpi_processor_ffh_cstate_enter - 43.32%43.32% swapper [kernel.kallsyms] [k] acpi_processor_ffh_cstate_enter -- You received this bug notification because you

[Kernel-packages] [Bug 1489622] Re: 15.10 20150826 snapshot -- MacBookPro3, 1 has high load (and temperature) despite low CPU and low IO

However, now on other attempts, I am seeing that processor.max_cstate=0 does not always eliminate the issue as I saw in the previous comment. Puzzling. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.

[Kernel-packages] [Bug 1489622] Re: 15.10 20150826 snapshot -- MacBookPro3, 1 has high load (and temperature) despite low CPU and low IO

Upon trying it again, I'm actually seeing the load drop down in the steady gpe17 after boot case. I just didn't wait long enough for the boot load spike to get out of the average. Please disregard that second half of my previous comment. Here are some more experiments: With

[Kernel-packages] [Bug 1489622] Re: 15.10 20150826 snapshot -- MacBookPro3, 1 has high load (and temperature) despite low CPU and low IO

** Attachment added: acpidump.txt https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1489622/+attachment/4453569/+files/acpidump.txt -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.

[Kernel-packages] [Bug 1489622] Re: 15.10 20150826 snapshot -- MacBookPro3, 1 has high load (and temperature) despite low CPU and low IO

On one particular boot with the external power connected, there were only 1176 interrupts for this event a few minutes after boot. It was stable at 1176. Upon disconnecting external power, it started its rapid cycling. Reconnecting the external power source did not solve the problem. On

[Kernel-packages] [Bug 1489622] Re: 15.10 20150826 snapshot -- MacBookPro3, 1 has high load (and temperature) despite low CPU and low IO

** Attachment added: dmidecode.txt https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1489622/+attachment/4453568/+files/dmidecode.txt -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.