NVIDIA and XanMod CL updates

General Discussion
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I built the Clear native kernel (2) without preemption + BORE, (3) preemption + BORE, and (4) one using HZ=800.

1. 6.8.2-1420.native          HZ=1000
2. 6.8.2-166.xmclear-default  HZ=1000  BORE 5.0.3
3. 6.8.2-166.xmclear-preempt  HZ=1000  BORE 5.0.3
4. 6.8.2-166.xmclear-preempt  HZ=800   BORE 5.0.3

Compute only: Running with idle attribute reaches non-preempt performance.

                       Clear Native    With BORE  Preempt+BORE Preempt+BORE
                           HZ=1000      HZ=1000      HZ=1000      HZ=800

$ ./algorithm3.pl 1e12     14.857s      14.770s      15.283s      15.244s
$ chrt -i 0 \
  ./algorithm3.pl 1e12     14.691s      14.671s      14.633s      14.644s

Next, four tasks running concurrently to capture latency results.

Xorg/GNOME: YouTube playback consumes lesser CPU on Xorg using NVIDIA.

Chromium Browser:  https://slowroads.io/
   Google Chrome:  https://www.youtube.com/watch?v=aqz-KE-bpKQ (1440p60 HD)

                       Clear Native    With BORE  Preempt+BORE Preempt+BORE
                           HZ=1000      HZ=1000      HZ=1000      HZ=800
$ chrt -i 0 \
  ./algorithm3.pl 2e12     37.579s      37.774s      38.539s      38.767s
$ ./schbench 
Latency percentiles (usec)
            50.0th:           37           30           32           32
            75.0th:          835          476          739          769
            90.0th:         1694         1102         2060         1806
            95.0th:         2372         1790         2676         2668
           *99.0th:         3884         2972         4264         3884
            99.5th:         4168         3340         4840         4424
            99.9th:         5368         4264         6024         5464
            min=0, max=     7120         6119         7607         7512

Apples-to-apples comparison to Clear Linux’s native kernel is BORE without preemption. Running background jobs? Either chrt -i 0 or preempt kernel is helpful for smooth Slow Roads demonstration.

HZ=800 performs better on my system for preempted kernels. For background jobs, running with idle attribute reaches non-preempt performance.

Results captured on an AMD Ryzen Threadripper 3970X machine.