* [PATCH] KVM: arm/arm64: show halt poll counters in debugfs
@ 2019-10-27 8:19 Christian Borntraeger
2019-10-29 10:23 ` Marc Zyngier
0 siblings, 1 reply; 2+ messages in thread
From: Christian Borntraeger @ 2019-10-27 8:19 UTC (permalink / raw)
To: Marc Zyngier
Cc: James Morse, Julien Thierry, Suzuki K Poulose, kvmarm, kvm,
linux-kernel, Christian Borntraeger
ARM/ARM64 has counters halt_successful_poll, halt_attempted_poll,
halt_poll_invalid, and halt_wakeup but never exposed those in debugfs.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
---
This patch is untested
arch/arm/kvm/guest.c | 4 ++++
arch/arm64/kvm/guest.c | 4 ++++
2 files changed, 8 insertions(+)
diff --git a/arch/arm/kvm/guest.c b/arch/arm/kvm/guest.c
index 684cf64..6696464 100644
--- a/arch/arm/kvm/guest.c
+++ b/arch/arm/kvm/guest.c
@@ -21,6 +21,10 @@
#define VCPU_STAT(x) { #x, offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU }
struct kvm_stats_debugfs_item debugfs_entries[] = {
+ VCPU_STAT(halt_successful_poll),
+ VCPU_STAT(halt_attempted_poll),
+ VCPU_STAT(halt_poll_invalid),
+ VCPU_STAT(halt_wakeup),
VCPU_STAT(hvc_exit_stat),
VCPU_STAT(wfe_exit_stat),
VCPU_STAT(wfi_exit_stat),
diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c
index dfd6264..260ea31 100644
--- a/arch/arm64/kvm/guest.c
+++ b/arch/arm64/kvm/guest.c
@@ -34,6 +34,10 @@
#define VCPU_STAT(x) { #x, offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU }
struct kvm_stats_debugfs_item debugfs_entries[] = {
+ VCPU_STAT(halt_successful_poll),
+ VCPU_STAT(halt_attempted_poll),
+ VCPU_STAT(halt_poll_invalid),
+ VCPU_STAT(halt_wakeup),
VCPU_STAT(hvc_exit_stat),
VCPU_STAT(wfe_exit_stat),
VCPU_STAT(wfi_exit_stat),
--
1.8.3.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] KVM: arm/arm64: show halt poll counters in debugfs
2019-10-27 8:19 [PATCH] KVM: arm/arm64: show halt poll counters in debugfs Christian Borntraeger
@ 2019-10-29 10:23 ` Marc Zyngier
0 siblings, 0 replies; 2+ messages in thread
From: Marc Zyngier @ 2019-10-29 10:23 UTC (permalink / raw)
To: Christian Borntraeger
Cc: James Morse, Julien Thierry, Suzuki K Poulose, kvmarm, kvm, linux-kernel
On Sun, 27 Oct 2019 08:19:50 +0000,
Christian Borntraeger <borntraeger@de.ibm.com> wrote:
Hi Christian,
> ARM/ARM64 has counters halt_successful_poll, halt_attempted_poll,
> halt_poll_invalid, and halt_wakeup but never exposed those in debugfs.
>
> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
> ---
> This patch is untested
Seems to do the right thing on arm64:
halt_attempted_poll:8106331
halt_poll_invalid:0
halt_successful_poll:1440219
halt_wakeup:21835894
Applied to -next.
Thanks,
M.
--
Jazz is not dead, it just smells funny.
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2019-10-29 10:23 ` Marc Zyngier
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