Bug 1296145
| Summary: | Gnome 3.18 - Gnome/Gnome Classic Mode using more CPU than Wayland mode | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | seveneightynine |
| Component: | gnome-shell | Assignee: | Owen Taylor <otaylor> |
| Status: | CLOSED NOTABUG | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | low | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 23 | CC: | fmuellner, otaylor |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2016-01-07 13:27:58 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Sorry, I did not understand when switching from X to Wayland and back and forth that tables need to be rebuilt. I simply did not stay logged in long enough for it to occur. |
Description of problem: When I log into Gnome/Gnome Classic and run powertop I notice that the amount of WAKEUPS is in the range of 100-300. In contrast, when I log into Gnome on Wayland the amount of wakeups are typically ~50. The top two sources of the high amount of wakups are reported as "[rcu_shed]" and "/usr/bin/gnome-shell". Next I run lscpu to get the current speed, and I notice that on Gnome/Gnome Classic the processor speed is always maxed out and never idling. Gnome on Wayland works as expected and actually idles to the minimum frequency. Version-Release number of selected component (if applicable): Gnome 3.18 Steps to Reproduce: 1. Run powertop on Gnome/Gnome Classic vs Gnome on Wayland. "[rcu_shed]" and "/usr/bin/gnome-shell" producing the main source of the wakeups on Gnome/Gnome Classic 2. Run lscpu to show that clock speed is always at max on Gnome/Gnome Classic, but idles to minimum on Gnome on Wayland Additional info: H/W path Device Class Description ===================================================== system Computer /0 bus Motherboard /0/0 memory 7892MiB System memory /0/1 processor Intel(R) Core(TM) i5-4288U CPU /0/100 bridge Haswell-ULT DRAM Controller /0/100/2 display Haswell-ULT Integrated Graphics /0/100/3 multimedia Haswell-ULT HD Audio Controller /0/100/14 bus 8 Series USB xHCI HC /0/100/16 communication 8 Series HECI #0 /0/100/1b multimedia 8 Series HD Audio Controller /0/100/1c bridge 8 Series PCI Express Root Port 1 /0/100/1c.1 bridge 8 Series PCI Express Root Port 2 /0/100/1c.1/0 multimedia 720p FaceTime HD Camera /0/100/1c.2 bridge 8 Series PCI Express Root Port 3 /0/100/1c.2/0 network BCM4360 802.11ac Wireless /0/100/1c.4 bridge 8 Series PCI Express Root Port 5 /0/100/1c.4/0 bridge DSL5520 Thunderbolt [Falcon Ridge] /0/100/1c.4/0/0 bridge DSL5520 Thunderbolt [Falcon Ridge] /0/100/1c.4/0/0/0 generic DSL5520 Thunderbolt [Falcon Ridge] /0/100/1c.4/0/3 bridge DSL5520 Thunderbolt [Falcon Ridge] /0/100/1c.4/0/4 bridge DSL5520 Thunderbolt [Falcon Ridge] /0/100/1c.4/0/5 bridge DSL5520 Thunderbolt [Falcon Ridge] /0/100/1c.4/0/6 bridge DSL5520 Thunderbolt [Falcon Ridge] /0/100/1c.5 bridge 8 Series PCI Express Root Port 6 /0/100/1c.5/0 storage Apple PCIe SSD /0/100/1f bridge 8 Series LPC Controller /0/100/1f.3 bus 8 Series SMBus Controller /1 scsi1 storage