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linux/arch/mips/kvm
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Paolo Bonzini 62bea5bff4 KVM: add halt_attempted_poll to VCPU stats 
This new statistic can help diagnosing VCPUs that, for any reason,
trigger bad behavior of halt_poll_ns autotuning.

For example, say halt_poll_ns = 480000, and wakeups are spaced exactly
like 479us, 481us, 479us, 481us. Then KVM always fails polling and wastes
10+20+40+80+160+320+480 = 1110 microseconds out of every
479+481+479+481+479+481+479 = 3359 microseconds. The VCPU then
is consuming about 30% more CPU than it would use without
polling.  This would show as an abnormally high number of
attempted polling compared to the successful polls.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com<
Reviewed-by: David Matlack <dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 		2015-09-16 12:17:00 +02:00
..
00README.txt KVM/MIPS32: Release notes and KVM module Makefile 2013-05-08 03:55:35 +02:00
Kconfig rcu: Make SRCU optional by using CONFIG_SRCU 2015-01-06 11:04:29 -08:00
Makefile MIPS: KVM: Add base guest MSA support 2015-03-27 21:25:19 +00:00
callback.c MIPS: KVM: Rename files to remove the prefix "kvm_" and "kvm_mips_" 2014-06-30 16:52:03 +02:00
commpage.c MIPS: KVM: Skip memory cleaning in kvm_mips_commpage_init() 2014-06-30 16:52:03 +02:00
commpage.h MIPS: KVM: Rename files to remove the prefix "kvm_" and "kvm_mips_" 2014-06-30 16:52:03 +02:00
dyntrans.c MIPS: KVM: Rename files to remove the prefix "kvm_" and "kvm_mips_" 2014-06-30 16:52:03 +02:00
emulate.c MIPS: KVM: Do not sign extend on unsigned MMIO load 2015-06-06 10:21:10 +02:00
fpu.S MIPS: KVM: Add base guest FPU support 2015-03-27 21:25:14 +00:00
interrupt.c MIPS: KVM: Rename files to remove the prefix "kvm_" and "kvm_mips_" 2014-06-30 16:52:03 +02:00
interrupt.h MIPS: KVM: Rename files to remove the prefix "kvm_" and "kvm_mips_" 2014-06-30 16:52:03 +02:00
locore.S MIPS: KVM: Add base guest MSA support 2015-03-27 21:25:19 +00:00
mips.c KVM: add halt_attempted_poll to VCPU stats 2015-09-16 12:17:00 +02:00
msa.S MIPS: KVM: Add base guest MSA support 2015-03-27 21:25:19 +00:00
opcode.h MIPS: KVM: Rename files to remove the prefix "kvm_" and "kvm_mips_" 2014-06-30 16:52:03 +02:00
stats.c MIPS: KVM: Add MSA exception handling 2015-03-27 21:25:20 +00:00
tlb.c MIPS: KVM: Add vcpu_get_regs/vcpu_set_regs callback 2015-03-27 21:25:13 +00:00
trace.h KVM: MIPS: Fix trace event to save PC directly 2015-03-02 19:17:52 -03:00
trap_emul.c MIPS: KVM: Add MSA exception handling 2015-03-27 21:25:20 +00:00