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KVM: stats: Add halt_wait_ns stats for all architectures

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Add simple stats halt_wait_ns to record the time a VCPU has spent on
waiting for all architectures (not just powerpc).

Signed-off-by: Jing Zhang <jingzhangos@google.com>
Message-Id: <20210802165633.1866976-5-jingzhangos@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Jing Zhang 2021-08-02 16:56:32 +00:00 committed by Paolo Bonzini
parent d49b11f080
commit 87bcc5fa09
7 changed files with 8 additions and 5 deletions
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1
arch/powerpc/include/asm/kvm_host.h
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@ -103,7 +103,6 @@ struct kvm_vcpu_stat {
u64 emulated_inst_exits;
u64 dec_exits;
u64 ext_intr_exits;
u64 halt_wait_ns;
u64 halt_successful_wait;
u64 dbell_exits;
u64 gdbell_exits;

1
arch/powerpc/kvm/book3s.c
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@ -69,7 +69,6 @@ const struct _kvm_stats_desc kvm_vcpu_stats_desc[] = {
STATS_DESC_COUNTER(VCPU, emulated_inst_exits),
STATS_DESC_COUNTER(VCPU, dec_exits),
STATS_DESC_COUNTER(VCPU, ext_intr_exits),
STATS_DESC_TIME_NSEC(VCPU, halt_wait_ns),
STATS_DESC_COUNTER(VCPU, halt_successful_wait),
STATS_DESC_COUNTER(VCPU, dbell_exits),
STATS_DESC_COUNTER(VCPU, gdbell_exits),

2
arch/powerpc/kvm/book3s_hv.c
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@ -4144,7 +4144,7 @@ out:
/* Attribute wait time */
if (do_sleep) {
vc->runner->stat.halt_wait_ns +=
vc->runner->stat.generic.halt_wait_ns +=
ktime_to_ns(cur) - ktime_to_ns(start_wait);
/* Attribute failed poll time */
if (vc->halt_poll_ns)

1
arch/powerpc/kvm/booke.c
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@ -67,7 +67,6 @@ const struct _kvm_stats_desc kvm_vcpu_stats_desc[] = {
STATS_DESC_COUNTER(VCPU, emulated_inst_exits),
STATS_DESC_COUNTER(VCPU, dec_exits),
STATS_DESC_COUNTER(VCPU, ext_intr_exits),
STATS_DESC_TIME_NSEC(VCPU, halt_wait_ns),
STATS_DESC_COUNTER(VCPU, halt_successful_wait),
STATS_DESC_COUNTER(VCPU, dbell_exits),
STATS_DESC_COUNTER(VCPU, gdbell_exits),

3
include/linux/kvm_host.h
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@ -1452,7 +1452,8 @@ struct _kvm_stats_desc {
STATS_DESC_COUNTER(VCPU_GENERIC, halt_poll_invalid), \
STATS_DESC_COUNTER(VCPU_GENERIC, halt_wakeup), \
STATS_DESC_TIME_NSEC(VCPU_GENERIC, halt_poll_success_ns), \
STATS_DESC_TIME_NSEC(VCPU_GENERIC, halt_poll_fail_ns)
STATS_DESC_TIME_NSEC(VCPU_GENERIC, halt_poll_fail_ns), \
STATS_DESC_TIME_NSEC(VCPU_GENERIC, halt_wait_ns)
extern struct dentry *kvm_debugfs_dir;

1
include/linux/kvm_types.h
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@ -87,6 +87,7 @@ struct kvm_vcpu_stat_generic {
u64 halt_wakeup;
u64 halt_poll_success_ns;
u64 halt_poll_fail_ns;
u64 halt_wait_ns;
};
#define KVM_STATS_NAME_SIZE 48

4
virt/kvm/kvm_main.c
View File

@ -3241,6 +3241,10 @@ void kvm_vcpu_block(struct kvm_vcpu *vcpu)
}
finish_rcuwait(&vcpu->wait);
cur = ktime_get();
if (waited) {
vcpu->stat.generic.halt_wait_ns +=
ktime_to_ns(cur) - ktime_to_ns(poll_end);
}
out:
kvm_arch_vcpu_unblocking(vcpu);
block_ns = ktime_to_ns(cur) - ktime_to_ns(start);