From c89ce9e7afd7b6b2aba2dd83a2c1faf4cf651262 Mon Sep 17 00:00:00 2001 From: Mark Salter Date: Thu, 20 Feb 2014 12:54:52 -0500 Subject: [PATCH 482/506] Reduce timer event frequency by 10 Timer event to keep grub msec counter was running at 1000HZ. This was too fast for UEFI timer driver and resulted in a 10x slowdown in grub time versus wallclock. Reduce the timer event frequency and increase tick increment accordingly to keep better time. Signed-off-by: Mark Salter --- grub-core/kern/arm/efi/init.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/grub-core/kern/arm/efi/init.c b/grub-core/kern/arm/efi/init.c index 2572ca8..06df60e 100644 --- a/grub-core/kern/arm/efi/init.c +++ b/grub-core/kern/arm/efi/init.c @@ -38,7 +38,7 @@ static void increment_timer (grub_efi_event_t event __attribute__ ((unused)), void *context __attribute__ ((unused))) { - tmr++; + tmr += 10; } void @@ -52,7 +52,7 @@ grub_machine_init (void) efi_call_5 (b->create_event, GRUB_EFI_EVT_TIMER | GRUB_EFI_EVT_NOTIFY_SIGNAL, GRUB_EFI_TPL_CALLBACK, increment_timer, NULL, &tmr_evt); - efi_call_3 (b->set_timer, tmr_evt, GRUB_EFI_TIMER_PERIODIC, 10000); + efi_call_3 (b->set_timer, tmr_evt, GRUB_EFI_TIMER_PERIODIC, 100000); grub_install_get_time_ms (grub_efi_get_time_ms); } -- 2.4.3