Re: CVS commit: src/sys/arch

[Nick Hudson <nick.hudson%gmx.co.uk@localhost>]

On 15/06/2026 16:18, Nick Hudson wrote:
> Module Name:	src
> Committed By:	skrll
> Date:		Mon Jun 15 15:18:04 UTC 2026
>
> Modified Files:
> 	src/sys/arch/aarch64/include: pmap_machdep.h types.h
> 	src/sys/arch/mips/include: types.h
> 	src/sys/arch/powerpc/include: types.h
> 	src/sys/arch/riscv/include: types.h
>
> Log Message:
> mi pmap: remove __HAVE_UNLOCKED_PMAP now the locking is fixed.
>
> The MI PMAP now allows the ability to process concurrent page faults on
> individual uvm_objects / vm_amaps in parallel, where the relevant pages
> are already in-core. As enabled in
>
> https://mail-index.netbsd.org/source-changes/2020/03/22/msg115362.html

When performing 6 timed kernel -j64 builds on thunderx (32 cpus) this
change sees a 30% improvement in system time.

+------------------+--------------------+--------------------+
| Metric           | Before Fix (Avg)   | After Fix (Avg)    |
+------------------+--------------------+--------------------+
| System Time      | 1176.03s           | 812.22s            |
|   Abs Change     |  -363.82s          |                    |
|   Rel Change     |   -30.94%          |                    |
+------------------+--------------------+--------------------+
| User Time        | 7186.63s           | 7211.47s           |
|   Abs Change     |   +24.84s          |                    |
|   Rel Change     |    +0.35%          |                    |
+------------------+--------------------+--------------------+
| Real Time        | 393.49s            | 384.69s            |
|                  | (6m 33.5s)         | (6m 24.7s)         |
|   Abs Change     |    -8.80s          |                    |
|   Rel Change     |    -2.24%          |                    |
+------------------+--------------------+--------------------+