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| author | Colin Percival <cperciva@FreeBSD.org> | 2021-09-07 23:59:45 +0000 |
|---|---|---|
| committer | Colin Percival <cperciva@FreeBSD.org> | 2021-09-08 01:31:55 +0000 |
| commit | a8b89dff6ac026e60983824889d3666842ff409b (patch) | |
| tree | 5659eb07f888d63eef5f6029aac8e4d529bef777 | |
| parent | 3c253d03d94e89cf1a26716b58fc27653df2a4f3 (diff) | |
| download | src-a8b89dff6ac026e60983824889d3666842ff409b.tar.gz src-a8b89dff6ac026e60983824889d3666842ff409b.zip | |
Disable acpi_timer_test by default
This disables testing the ACPI timer by default, forcing the use of
ACPI-fast rather than ACPI-safe. The broken-ACPI-timers workaround
can be re-enabled by setting the hw.acpi.timer_test_enabled=1 tunable.
This speeds up the FreeBSD boot process by 140 ms on an EC2 c5.xlarge
instance.
This change will not be MFCed.
Assuming no problems are reported, acpi_timer_test, the associated
tunable, and the ACPI-safe timecounter should be removed in FreeBSD 15.
Relnotes: The ACPI-safe timer is disabled in favour of ACPI-fast;
if timekeeping issues are observed, please test with
hw.acpi.timer_test_enabled=1 in loader.conf and report
if that fixes the problem.
| -rw-r--r-- | sys/dev/acpica/acpi_timer.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/dev/acpica/acpi_timer.c b/sys/dev/acpica/acpi_timer.c index 8be6e0edea7f..8e3947709b61 100644 --- a/sys/dev/acpica/acpi_timer.c +++ b/sys/dev/acpica/acpi_timer.c @@ -79,7 +79,7 @@ static int acpi_timer_sysctl_freq(SYSCTL_HANDLER_ARGS); static void acpi_timer_boot_test(void); static int acpi_timer_test(void); -static int acpi_timer_test_enabled = 1; +static int acpi_timer_test_enabled = 0; TUNABLE_INT("hw.acpi.timer_test_enabled", &acpi_timer_test_enabled); static device_method_t acpi_timer_methods[] = { |