Date: Wed, 15 Sep 2021 03:08:44 GMT From: Colin Percival <cperciva@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 34a3091cc3b6 - stable/13 - Turn off acpi_timer_test on !i386 by default Message-ID: <202109150308.18F38iGw049171@gitrepo.freebsd.org>
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The branch stable/13 has been updated by cperciva: URL: https://cgit.FreeBSD.org/src/commit/?id=34a3091cc3b6e09efe480c7e9e9e72fa9db00d89 commit 34a3091cc3b6e09efe480c7e9e9e72fa9db00d89 Author: Colin Percival <cperciva@FreeBSD.org> AuthorDate: 2021-09-15 02:42:14 +0000 Commit: Colin Percival <cperciva@FreeBSD.org> CommitDate: 2021-09-15 02:42:14 +0000 Turn off acpi_timer_test on !i386 by default The ACPI timer test was introduced in 2002 to detect an erratum in chipsets used with Pentium II and Pentium III processors. No other hardware is known to be affected, so on non-i386 systems it should be safe to skip the test. Turning off this test speeds up the FreeBSD boot process by roughly 140 ms on an EC2 c5.xlarge instance. The previous behaviour can be restored by setting hw.acpi.timer_test_enabled=1 in /boot/loader.conf. Requested by: jhb, imp Sponsored by: https://www.patreon.com/cperciva --- sys/dev/acpica/acpi_timer.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/sys/dev/acpica/acpi_timer.c b/sys/dev/acpica/acpi_timer.c index 8be6e0edea7f..e9e488f9022a 100644 --- a/sys/dev/acpica/acpi_timer.c +++ b/sys/dev/acpica/acpi_timer.c @@ -79,7 +79,11 @@ static int acpi_timer_sysctl_freq(SYSCTL_HANDLER_ARGS); static void acpi_timer_boot_test(void); static int acpi_timer_test(void); +#ifdef __i386__ static int acpi_timer_test_enabled = 1; +#else +static int acpi_timer_test_enabled = 0; +#endif TUNABLE_INT("hw.acpi.timer_test_enabled", &acpi_timer_test_enabled); static device_method_t acpi_timer_methods[] = {
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