Dear Alan,
Thank you for the quick response.
Am Donnerstag, den 04.05.2017, 15:43 -0400 schrieb Alan Stern:
> On Thu, 4 May 2017, Paul Menzel wrote:
> > With commit 85724edec (Merge tag 'leds_for_4.12' of
> > git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds),
> > testing the resume time on a Lenovo X60t connected to the docking
> > station with the script `analyze_suspend.py` [1][2], one USB
> > controller(?) needs the most time with 376 ms.
>
> Well, it's always going to be true that _one_ of the USB controllers
> needs more time than the others. :-)
>
> Where do you get than 376 ms number from? The attached graph and
> listing show that 0000:00:1d.7 and usb5 (the PCI and USB interfaces of
> the EHCI controller) take 18.971 ms in resume_noirq and 119.183 ms in
> resume, for a total of 138.154 ms.
>
> > > usb @ 17ef:1000 [5-6] {usb} async_device (Total Suspend: 88.202 ms Total Resume: 376.385 ms)
>
> 5-6 is not the EHCI controller. It is a USB device plugged into that
> controller.
I am sorry for mixing that up.
> > Around 270 ms are spent in `generic_resume [usbcore]`.
>
> generic_resume doesn't do anything; it just calls usb_port_resume to do
> the real work.
>
> > Please find the compressed HTML result page attached, which was created
> > with `sudo ./analyze_suspend.py -config config/suspend-callgraph.cfg`.
> >
> > Here is some more information about the devices.
>
> You didn't include any information about the 5-6 device.
>
> > Can there something be done about that?
>
> Hard to say without knowing anything about the device. Or what driver
> it uses.
From the top of my head, no external USB device is connected. I can
only think of the tablet functionality (Wacom(?)). Hopefully the
information below is more useful.
```
$ lsusb
Bus 001 Device 002: ID 17ef:1000 Lenovo
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
$ journalctl -k | grep -i usb
Mai 07 13:44:19 gm-debian kernel: ACPI: bus type USB registered
Mai 07 13:44:19 gm-debian kernel: usbcore: registered new interface driver usbfs
Mai 07 13:44:19 gm-debian kernel: usbcore: registered new interface driver hub
Mai 07 13:44:19 gm-debian kernel: usbcore: registered new device driver usb
Mai 07 13:44:19 gm-debian kernel: ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
Mai 07 13:44:19 gm-debian kernel: ehci-pci 0000:00:1d.7: new USB bus registered, assigned bus number 1
Mai 07 13:44:19 gm-debian kernel: uhci_hcd: USB Universal Host Controller Interface driver
Mai 07 13:44:19 gm-debian kernel: ehci-pci 0000:00:1d.7: USB 2.0 started, EHCI 1.00
Mai 07 13:44:19 gm-debian kernel: usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
Mai 07 13:44:19 gm-debian kernel: usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
Mai 07 13:44:19 gm-debian kernel: usb usb1: Product: EHCI Host Controller
Mai 07 13:44:19 gm-debian kernel: usb usb1: Manufacturer: Linux 4.11.0+ ehci_hcd
Mai 07 13:44:19 gm-debian kernel: usb usb1: SerialNumber: 0000:00:1d.7
Mai 07 13:44:19 gm-debian kernel: hub 1-0:1.0: USB hub found
Mai 07 13:44:19 gm-debian kernel: uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 2
Mai 07 13:44:19 gm-debian kernel: usb usb2: New USB device found, idVendor=1d6b, idProduct=0001
Mai 07 13:44:19 gm-debian kernel: usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
Mai 07 13:44:19 gm-debian kernel: usb usb2: Product: UHCI Host Controller
Mai 07 13:44:19 gm-debian kernel: usb usb2: Manufacturer: Linux 4.11.0+ uhci_hcd
Mai 07 13:44:19 gm-debian kernel: usb usb2: SerialNumber: 0000:00:1d.0
Mai 07 13:44:19 gm-debian kernel: hub 2-0:1.0: USB hub found
Mai 07 13:44:19 gm-debian kernel: uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 3
Mai 07 13:44:19 gm-debian kernel: usb usb3: New USB device found, idVendor=1d6b, idProduct=0001
Mai 07 13:44:19 gm-debian kernel: usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
Mai 07 13:44:19 gm-debian kernel: usb usb3: Product: UHCI Host Controller
Mai 07 13:44:19 gm-debian kernel: usb usb3: Manufacturer: Linux 4.11.0+ uhci_hcd
Mai 07 13:44:19 gm-debian kernel: usb usb3: SerialNumber: 0000:00:1d.1
Mai 07 13:44:19 gm-debian kernel: hub 3-0:1.0: USB hub found
Mai 07 13:44:19 gm-debian kernel: uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 4
Mai 07 13:44:19 gm-debian kernel: usb usb4: New USB device found, idVendor=1d6b, idProduct=0001
Mai 07 13:44:19 gm-debian kernel: usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
Mai 07 13:44:19 gm-debian kernel: usb usb4: Product: UHCI Host Controller
Mai 07 13:44:19 gm-debian kernel: usb usb4: Manufacturer: Linux 4.11.0+ uhci_hcd
Mai 07 13:44:19 gm-debian kernel: usb usb4: SerialNumber: 0000:00:1d.2
Mai 07 13:44:19 gm-debian kernel: hub 4-0:1.0: USB hub found
Mai 07 13:44:19 gm-debian kernel: uhci_hcd 0000:00:1d.3: new USB bus registered, assigned bus number 5
Mai 07 13:44:19 gm-debian kernel: usb usb5: New USB device found, idVendor=1d6b, idProduct=0001
Mai 07 13:44:19 gm-debian kernel: usb usb5: New USB device strings: Mfr=3, Product=2, SerialNumber=1
Mai 07 13:44:19 gm-debian kernel: usb usb5: Product: UHCI Host Controller
Mai 07 13:44:19 gm-debian kernel: usb usb5: Manufacturer: Linux 4.11.0+ uhci_hcd
Mai 07 13:44:19 gm-debian kernel: usb usb5: SerialNumber: 0000:00:1d.3
Mai 07 13:44:19 gm-debian kernel: hub 5-0:1.0: USB hub found
Mai 07 13:44:19 gm-debian kernel: usb 1-6: new high-speed USB device number 2 using ehci-pci
Mai 07 13:44:19 gm-debian kernel: usb 1-6: New USB device found, idVendor=17ef, idProduct=1000
Mai 07 13:44:19 gm-debian kernel: usb 1-6: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Mai 07 13:44:19 gm-debian kernel: hub 1-6:1.0: USB hub found
```
Thanks,
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