Hi,
I am using nouveau.The related log is listed below.
GPU model is NVIDIA GeForce GT 650M which was manufactured 9 years
ago.I also do the same test on NVIDIA GK107M which was mentioned in last
letter.
Sombody claims that they have killed the latency by using nouveau.
While I using X11 on my laptop, the latency is still a problem.I have
modified the config file for X11 following the guideline on the xenomai
wifi.
Best regards.
sun@sun-Lenovo-IdeaPad-Y480:~$ lspci -nnk | grep -iA2 vga
00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core
processor Graphics Controller [8086:0166] (rev 09)
Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:3977]
Kernel driver in use: i915
--
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK107M
[GeForce GT 650M] [10de:0fd1] (rev a1)
Subsystem: Lenovo GK107M [GeForce GT 650M] [17aa:3977]
Kernel driver in use: nouveau
sun@sun-Lenovo-IdeaPad-Y480:~$
joy@joy-Lenovo-IdeaPad-Y480:~$ lspci -nnk | grep -iA2 vga
00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core
processor Graphics Controller [8086:0166] (rev 09)
Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:3977]
Kernel driver in use: i915
--
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK107M
[GeForce GT 650M] [10de:0fd1] (rev a1)
Subsystem: Lenovo GK107M [GeForce GT 650M] [17aa:3977]
Kernel driver in use: nouveau
joy@joy-Lenovo-IdeaPad-Y480:~$
Jan Kiszka <jan.kis...@siemens.com> 于2020年4月9日周四 上午12:41写道：
> On 08.04.20 15:13, 孙世龙 wrote:
> > Hi,
> > I could not catch your idea about the GPU usage patterns. How
> > could I acquire this information?
> > My laptop model is Dell Latitude 5501 runing over ubuntu 14.04
> > system.
> > GPU model information： NVIDIA GeForce MX150.
> >
>
> NVIDIA... using their close-source driver or nouveau?
>
> It's been a long time I ran that on a Xenomai box, I only vaguely
> remember that there used to be issues with lengthy cache flushes when
> data is pushed to RAM in order to make it visible to the GPU.
>
> Jan
>
> > Best regards.
> >
> > Jan Kiszka <jan.kis...@siemens.com <mailto:jan.kis...@siemens.com>> 于
> > 2020年4月8日周三 下午5:05写道：
> >
> > On 08.04.20 10:39, 孙世龙 via Xenomai wrote:
> > > Hi,
> > > Why X11 influences the latency of xenomai？I guess it has
> > some relation
> > > to GPU.Could you make me more clearly?
> > > I have solved the latency . I am using QT runing on linux
> > framebuffer
> > > ,disabled X11 at all.I really hope to why X11 influences the
> > latency of
> > > xenomai
> >
> > It's not X11, it's the side effects of certain GPU usage patterns on
> > your particular platform. Can you specify more details about both?
> >
> > Jan
> >
> > --
> > Siemens AG, Corporate Technology, CT RDA IOT SES-DE
> > Corporate Competence Center Embedded Linux
> >
>
>
> --
> Siemens AG, Corporate Technology, CT RDA IOT SES-DE
> Corporate Competence Center Embedded Linux
>
