[SCM] GNU Mach branch, master, updated. v1.8-747-gb11e10e2

[Samuel Thibault]

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       via  31d45d0d8ee1d8eee96fc2a283a388b6b6aca669 (commit)
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- Log -----------------------------------------------------------------
commit b11e10e2c81c2b608176021364a36d84173358e3
Author: Damien Zammit <damien@zamaudio.com>
Date:   Sun Sep 24 10:35:10 2023 +0000

    percpu area using gs segment
    
    This speeds up smp again, by storing the struct processor
    in a percpu area and avoiding an expensive cpu_number every call
    of current_processor(), as well as getting the cpu_number by
    an offset into the percpu area.  Untested on 64 bit
    and work remains to use other percpu arrays.
    
    TESTED: (NCPUS=8) -smp 1 boots to login shell ~2x slower than uniprocessor
    TESTED: (NCPUS=8) -smp 2 boots to INIT but hangs there
    TESTED: (NCPUS=8) -smp 4 gets stuck seemingly within rumpdisk and hangs
    TESTED: (NCPUS=1) uniprocessor is a bit faster than normal
    
    Message-Id: <20230924103428.455966-3-damien@zamaudio.com>

commit 31d45d0d8ee1d8eee96fc2a283a388b6b6aca669
Author: Damien Zammit <damien@zamaudio.com>
Date:   Sun Sep 24 10:34:49 2023 +0000

    cpu_number: Inline widely used simple function
    
    TESTED: on uniprocessor and smp, both behaved as normal.
    
    Message-Id: <20230924103428.455966-2-damien@zamaudio.com>

-----------------------------------------------------------------------

Summary of changes:
 i386/Makefrag.am                     |  2 +
 i386/Makefrag_x86.am                 |  1 -
 i386/i386/cpu_number.h               | 25 +++++++++--
 i386/i386/fpu.c                      |  2 +-
 i386/i386/gdt.c                      | 21 +++++++--
 i386/i386/gdt.h                      |  8 ++--
 i386/i386/i386asm.sym                |  2 +
 i386/i386/locore.S                   | 20 +++++----
 i386/i386/mp_desc.c                  |  3 +-
 i386/i386/{cpu_number.c => percpu.c} | 23 +++++-----
 i386/i386/percpu.h                   | 83 ++++++++++++++++++++++++++++++++++++
 i386/i386/pit.c                      |  2 +-
 i386/i386/spl.S                      | 16 +++----
 i386/i386at/model_dep.c              |  1 +
 kern/ast.h                           |  1 -
 kern/cpu_number.h                    |  3 +-
 kern/processor.c                     |  7 +--
 kern/processor.h                     | 20 +++------
 kern/startup.c                       |  3 +-
 kern/thread.h                        |  3 +-
 x86_64/Makefrag.am                   |  2 +
 x86_64/locore.S                      |  7 +--
 22 files changed, 186 insertions(+), 69 deletions(-)
 rename i386/i386/{cpu_number.c => percpu.c} (67%)
 create mode 100644 i386/i386/percpu.h


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