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arm-efi: Reduce timer event frequency by 10

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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.
This commit is contained in:
Mark Salter 2016-01-07 20:53:41 +01:00 • committed by Vladimir Serbinenko
parent a2dcab70f8
commit 7eb27a49e9
1 changed files with 2 additions and 2 deletions
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4
grub-core/kern/arm/efi/init.c
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@ -38,7 +38,7 @@ static void
increment_timer (grub_efi_event_t event __attribute__ ((unused)), increment_timer (grub_efi_event_t event __attribute__ ((unused)),
void *context __attribute__ ((unused))) void *context __attribute__ ((unused)))
{ {
tmr++; tmr += 10;
} }
void void
@ -52,7 +52,7 @@ grub_machine_init (void)
efi_call_5 (b->create_event, GRUB_EFI_EVT_TIMER | GRUB_EFI_EVT_NOTIFY_SIGNAL, efi_call_5 (b->create_event, GRUB_EFI_EVT_TIMER | GRUB_EFI_EVT_NOTIFY_SIGNAL,
GRUB_EFI_TPL_CALLBACK, increment_timer, NULL, &tmr_evt); 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); grub_install_get_time_ms (grub_efi_get_time_ms);
} }