AcoSail/kernel_optimize_test
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kernel_optimize_test/arch/i386/kernel
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Thomas Gleixner ca1b940ce6 [PATCH] i386: trust the PM-Timer calibration of the local APIC timer 
When PM-Timer is available for local APIC timer calibration we can skip the
verification of the calibrated time value.  The resulting error is quite
small on a bunch of evaluated platforms and is less harming than the
observed false positives.

We need to keep the verification on systems, which have no PM-Timer to
avoid bogus local APIC timer calibrations in the range of factor 2-10,
which can be observed when swicthing off the PM-timer support in the kernel
configuration.

The wrong calibration values are probably caused by SMM code trying to
emulate a PS/2 keyboard from a (maybe connected or not) USB keyboard.  This
prohibits the accurate delivery of PIT interrupts, which are used to
calibrate the local APIC timer.  Unfortunately we have no way to disable
this BIOS misfeature in the early boot process.

Add also the dropped cpu_relax() back to the wait loops.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-18 11:35:08 -07:00
..
acpi Pull bugzilla-5966 into release branch 2007-03-09 23:18:05 -05:00
cpu Revert "[CPUFREQ] constify cpufreq_driver where possible." 2007-02-26 14:55:48 -08:00
.gitignore [PATCH] x86: gitignore some autogenerated files for i386 2006-02-14 16:09:35 -08:00
alternative.c [PATCH] paravirt: Patch inline replacements for paravirt intercepts 2006-12-07 02:14:08 +01:00
apic.c [PATCH] i386: trust the PM-Timer calibration of the local APIC timer 2007-03-18 11:35:08 -07:00
apm.c [PATCH] i386: use GTOD persistent clock support 2007-02-16 08:13:57 -08:00
asm-offsets.c [PATCH] i386: Convert i386 PDA code to use %fs 2007-02-13 13:26:20 +01:00
bootflag.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
cpuid.c [PATCH] i386: use smp_call_function_single() 2007-02-13 13:26:23 +01:00
crash_dump.c [PATCH] kdump: read previous kernel's memory 2006-01-10 08:01:28 -08:00
crash.c [PATCH] Kexec / Kdump: Unify elf note code 2006-12-07 08:39:46 -08:00
doublefault.c [PATCH] i386: cpu_relax() in crash.c and doublefault.c 2006-06-25 10:00:55 -07:00
e820.c [PATCH] i386: romsignature/checksum cleanup 2007-02-13 13:26:22 +01:00
early_printk.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
efi_stub.S [PATCH] x86: remove unused include from efi_stub.S 2006-09-26 08:48:56 -07:00
efi.c [PATCH] EFI x86: pass firmware call parameters on the stack 2007-02-04 10:27:10 -08:00
entry.S [PATCH] i386: entry.S END/ENDPROC annotations 2007-02-13 13:26:24 +01:00
head.S [PATCH] i386: Rename cpu_gdt_descr and remove extern declaration from smpboot.c 2007-02-13 13:26:26 +01:00
hpet.c [PATCH] clocksource init adjustments (fix bug #7426) 2007-03-05 07:57:53 -08:00
i386_ksyms.c [PATCH] x86: Export _proxy_pda for gcc 4.2 2007-03-16 21:07:36 +01:00
i387.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
i8237.c [PATCH] mmc (mainly): add "or later" clause to licence statement. 2006-10-01 00:39:23 -07:00
i8253.c [PATCH] clocksource init adjustments (fix bug #7426) 2007-03-05 07:57:53 -08:00
i8259.c [PATCH] genirq: do not mask interrupts by default 2007-02-16 08:14:00 -08:00
init_task.c [PATCH] nsproxy: move init_nsproxy into kernel/nsproxy.c 2006-10-02 07:57:20 -07:00
io_apic.c [PATCH] x86_64/i386 irq: Fix !CONFIG_SMP compilation 2007-02-28 08:52:31 -08:00
ioport.c [PATCH] i386: use thread_info flags for debug regs and IO bitmaps 2006-07-09 18:47:12 -07:00
irq.c Revert "[PATCH] i386: add idle notifier" 2007-02-26 09:21:46 -08:00
kprobes.c [PATCH] i386: Kprobe rpl fix 2007-02-13 13:26:21 +01:00
ldt.c [PATCH] i386: remove default_ldt, and simplify ldt-setting. 2006-12-07 02:14:01 +01:00
machine_kexec.c [PATCH] i386: Avoid overwriting the current pgd (V4, i386) 2006-09-26 10:52:38 +02:00
Makefile [PATCH] clockevents: i386 drivers 2007-02-16 08:13:59 -08:00
mca.c [PATCH] i386: replace kmalloc+memset with kzalloc 2006-12-07 02:14:19 +01:00
microcode.c [PATCH] i386: Fix warning in microcode.c 2007-02-13 13:26:25 +01:00
module.c [PATCH] Generic BUG for i386 2006-12-08 08:28:39 -08:00
mpparse.c ACPICA: use new ACPI headers. 2007-02-02 21:14:28 -05:00
msr.c [PATCH] i386: use smp_call_function_single() 2007-02-13 13:26:23 +01:00
nmi.c Disable NMI watchdog by default properly 2007-03-14 17:53:43 -07:00
numaq.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
paravirt.c [PATCH] vmi: pit override 2007-03-05 07:57:52 -08:00
pci-dma.c [PATCH] fix memory leak in dma_declare_coherent_memory() 2007-03-01 14:53:39 -08:00
pcspeaker.c [PATCH] x86: Unify pcspeaker platform device code between i386/x86-64 2007-02-13 13:26:26 +01:00
process.c Revert "[PATCH] i386: add idle notifier" 2007-02-26 09:21:46 -08:00
ptrace.c [PATCH] i386: Convert i386 PDA code to use %fs 2007-02-13 13:26:20 +01:00
quirks.c [PATCH] x86: Fix verify_quirk_intel_irqbalance() 2006-12-09 21:33:35 +01:00
reboot_fixups.c [PATCH] i386: Remove printk about reboot fixups at reboot 2006-04-09 11:53:53 -07:00
reboot.c [PATCH] arch/i386/kernel/reboot.c should #include <linux/reboot.h> 2006-12-07 08:39:44 -08:00
relocate_kernel.S [PATCH] i386: Avoid overwriting the current pgd (V4, i386) 2006-09-26 10:52:38 +02:00
scx200.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
setup.c [PATCH] clocksource init adjustments (fix bug #7426) 2007-03-05 07:57:53 -08:00
sigframe.h [PATCH] __user annotations for pointers in i386 sigframe 2005-09-09 10:31:59 -07:00
signal.c [PATCH] x86: Don't require the vDSO for handling a.out signals 2007-02-13 13:26:26 +01:00
smp.c Revert "[PATCH] i386: add idle notifier" 2007-02-26 09:21:46 -08:00
smpboot.c [PATCH] CPU hotplug: call check_tsc_sync_source() with irqs off 2007-03-07 10:07:24 -08:00
srat.c ACPI: build fix for IBM x440 - CONFIG_X86_SUMMIT 2007-02-02 21:47:33 -05:00
summit.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sys_i386.c [PATCH] provide kernel_execve on all architectures 2006-10-02 07:57:23 -07:00
syscall_table.S [PATCH] epoll_pwait() 2006-10-11 11:14:21 -07:00
sysenter.c [PATCH] i386: Fix broken CONFIG_COMPAT_VDSO on i386 2007-02-13 13:26:26 +01:00
time.c [PATCH] clocksource init adjustments (fix bug #7426) 2007-03-05 07:57:53 -08:00
topology.c Replace remaining references to "driverfs" with "sysfs". 2007-02-17 19:13:42 +01:00
trampoline.S [PATCH] i386: fix modpost warning in SMP trampoline code 2007-01-05 23:55:23 -08:00
traps.c [PATCH] i386: add option to show more code in oops reports 2007-02-13 13:26:25 +01:00
tsc_sync.c [PATCH] x86: rewrite SMP TSC sync code 2007-02-16 08:13:57 -08:00
tsc.c [PATCH] i386: Don't use the TSC in sched_clock if unstable 2007-03-16 21:07:36 +01:00
vm86.c [PATCH] i386: Convert i386 PDA code to use %fs 2007-02-13 13:26:20 +01:00
vmi.c [PATCH] i386: Enforce GPLness of VMI ROM 2007-03-16 21:07:36 +01:00
vmitime.c [PATCH] Scheduled removal of SA_xxx interrupt flags fixups 3 2007-03-06 09:30:24 -08:00
vmlinux.lds.S [PATCH] i386: move startup_32() in text.head section 2007-02-13 13:26:22 +01:00
vsyscall-int80.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
vsyscall-note.S [PATCH] i386 vDSO: add PT_NOTE segment 2005-04-16 15:24:48 -07:00
vsyscall-sigreturn.S [PATCH] Mark unwind info for signal trampolines in vDSOs 2006-03-31 12:18:52 -08:00
vsyscall-sysenter.S [PATCH] vdso: randomize the i386 vDSO by moving it into a vma 2006-06-27 17:32:38 -07:00
vsyscall.lds.S [PATCH] vDSO hash-style fix 2006-07-31 13:28:43 -07:00
vsyscall.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00