search for: 6aa33702c15c

...8% fio [k] __raw_callee_save___kvm_vcpu_is_preempt >> 3.93% 3.93% fio [k] __kvm_vcpu_is_preempted >> > Thinking about this again, wouldn't something like the below also work? > > > diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c > index 099fcba4981d..6aa33702c15c 100644 > --- a/arch/x86/kernel/kvm.c > +++ b/arch/x86/kernel/kvm.c > @@ -589,6 +589,7 @@ static void kvm_wait(u8 *ptr, u8 val) > local_irq_restore(flags); > } > > +#ifdef CONFIG_X86_32 > __visible bool __kvm_vcpu_is_preempted(int cpu) > { > struct kvm_steal_ti...

...8% fio [k] __raw_callee_save___kvm_vcpu_is_preempt >> 3.93% 3.93% fio [k] __kvm_vcpu_is_preempted >> > Thinking about this again, wouldn't something like the below also work? > > > diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c > index 099fcba4981d..6aa33702c15c 100644 > --- a/arch/x86/kernel/kvm.c > +++ b/arch/x86/kernel/kvm.c > @@ -589,6 +589,7 @@ static void kvm_wait(u8 *ptr, u8 val) > local_irq_restore(flags); > } > > +#ifdef CONFIG_X86_32 > __visible bool __kvm_vcpu_is_preempted(int cpu) > { > struct kvm_steal_ti...

...k] osq_lock > 9.46% 7.88% fio [k] __raw_callee_save___kvm_vcpu_is_preempt > 3.93% 3.93% fio [k] __kvm_vcpu_is_preempted > Thinking about this again, wouldn't something like the below also work? diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c index 099fcba4981d..6aa33702c15c 100644 --- a/arch/x86/kernel/kvm.c +++ b/arch/x86/kernel/kvm.c @@ -589,6 +589,7 @@ static void kvm_wait(u8 *ptr, u8 val) local_irq_restore(flags); } +#ifdef CONFIG_X86_32 __visible bool __kvm_vcpu_is_preempted(int cpu) { struct kvm_steal_time *src = &per_cpu(steal_time, cpu); @@ -597,6...

...ve___kvm_vcpu_is_preempt >>> 3.93% 3.93% fio [k] __kvm_vcpu_is_preempted >>> >> Thinking about this again, wouldn't something like the below also work? >> >> >> diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c >> index 099fcba4981d..6aa33702c15c 100644 >> --- a/arch/x86/kernel/kvm.c >> +++ b/arch/x86/kernel/kvm.c >> @@ -589,6 +589,7 @@ static void kvm_wait(u8 *ptr, u8 val) >> local_irq_restore(flags); >> } >> >> +#ifdef CONFIG_X86_32 >> __visible bool __kvm_vcpu_is_preempted(int cpu) &g...

It was found when running fio sequential write test with a XFS ramdisk on a VM running on a 2-socket x86-64 system, the %CPU times as reported by perf were as follows: 69.75% 0.59% fio [k] down_write 69.15% 0.01% fio [k] call_rwsem_down_write_failed 67.12% 1.12% fio [k] rwsem_down_write_failed 63.48% 52.77% fio [k] osq_lock 9.46% 7.88% fio [k]

It was found when running fio sequential write test with a XFS ramdisk on a VM running on a 2-socket x86-64 system, the %CPU times as reported by perf were as follows: 69.75% 0.59% fio [k] down_write 69.15% 0.01% fio [k] call_rwsem_down_write_failed 67.12% 1.12% fio [k] rwsem_down_write_failed 63.48% 52.77% fio [k] osq_lock 9.46% 7.88% fio [k]