| created | 2022-11-24T13:14:58Z |
|---|---|
| begin | 2022-11-08T16:53:40Z |
| end | 2022-11-08T17:34:13Z |
| path | src/sys |
| commits | 2 |
| date | 2022-11-08T17:34:12Z | |||
|---|---|---|---|---|
| author | cheloha | |||
| files | src/sys/arch/amd64/amd64/acpi_machdep.c | log | diff | annotate |
| message |
amd64: switch to clockintr(9) Switch amd64 to the clockintr(9) subsystem. There are lots of little changes, but the bigs ones are listed here. When using the local apic timer: - Run the timer in one-shot mode. - lapic_delay() is gone. We can't use it to delay(9) when running the timer in one-shot mode. - Add a randomized statclock(); stathz = hz. - Add support for switching to profhz when profiling is enabled; profhz = stathz * 10. When using the i8254/mc146818: - i8254's clockintr() no longer has a monopoly on hardclock(). - mc146818's rtcintr() no longer has a monopoly on statclock(). - In profiling mode, the statclock() will drift very slightly because (profhz = 1024) does not divide evenly into one billion. We could avoid this by setting (profhz = 512) instead and programming the RTC to run at that rate. Early revisions reviewed by mlarkin@. Extensively tested by mlarkin@ on a variety of physical and virtual hardware. Additional testing from dv@ and jmc@. Link: https://marc.info/?l=openbsd-tech&m=166776339203279&w=2 ok kettenis@ mlarkin@ |
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| date | 2022-11-08T17:34:13Z | |||
|---|---|---|---|---|
| author | cheloha | |||
| files | src/sys/arch/amd64/amd64/cpu.c | log | diff | annotate |
| src/sys/arch/amd64/amd64/lapic.c | log | diff | annotate | |
| src/sys/arch/amd64/include/_types.h | log | diff | annotate | |
| src/sys/arch/amd64/include/cpu.h | log | diff | annotate | |
| src/sys/arch/amd64/isa/clock.c | log | diff | annotate | |
| message |
amd64: switch to clockintr(9) Switch amd64 to the clockintr(9) subsystem. There are lots of little changes, but the bigs ones are listed here. When using the local apic timer: - Run the timer in one-shot mode. - lapic_delay() is gone. We can't use it to delay(9) when running the timer in one-shot mode. - Add a randomized statclock(); stathz = hz. - Add support for switching to profhz when profiling is enabled; profhz = stathz * 10. When using the i8254/mc146818: - i8254's clockintr() no longer has a monopoly on hardclock(). - mc146818's rtcintr() no longer has a monopoly on statclock(). - In profiling mode, the statclock() will drift very slightly because (profhz = 1024) does not divide evenly into one billion. We could avoid this by setting (profhz = 512) instead and programming the RTC to run at that rate. Early revisions reviewed by mlarkin@. Extensively tested by mlarkin@ on a variety of physical and virtual hardware. Additional testing from dv@ and jmc@. Link: https://marc.info/?l=openbsd-tech&m=166776339203279&w=2 ok kettenis@ mlarkin@ |
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