From: Paul Mackerras <paulus@ozlabs.org> To: kvm@vger.kernel.org, linuxppc-dev@ozlabs.org Cc: kvm-ppc@vger.kernel.org Subject: [PATCH 13/13] KVM: PPC: Book3S HV: Counters for passthrough IRQ stats Date: Fri, 19 Aug 2016 15:35:57 +1000 [thread overview] Message-ID: <1471584957-21484-14-git-send-email-paulus@ozlabs.org> (raw) In-Reply-To: <1471584957-21484-1-git-send-email-paulus@ozlabs.org> From: Suresh Warrier <warrier@linux.vnet.ibm.com> Add VCPU stat counters to track affinity for passthrough interrupts. pthru_all: Counts all passthrough interrupts whose IRQ mappings are in the kvmppc_passthru_irq_map structure. pthru_host: Counts all cached passthrough interrupts that were injected from the host through kvm_set_irq (i.e. not handled in real mode). pthru_bad_aff: Counts how many cached passthrough interrupts have bad affinity (receiving CPU is not running VCPU that is the target of the virtual interrupt in the guest). Signed-off-by: Suresh Warrier <warrier@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@ozlabs.org> --- arch/powerpc/include/asm/kvm_host.h | 3 +++ arch/powerpc/kvm/book3s.c | 3 +++ arch/powerpc/kvm/book3s_hv_rm_xics.c | 18 +++++++++++++----- 3 files changed, 19 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 3eb5092..f371a23 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -131,6 +131,9 @@ struct kvm_vcpu_stat { u32 ld_slow; u32 st_slow; #endif + u32 pthru_all; + u32 pthru_host; + u32 pthru_bad_aff; }; enum kvm_exit_types { diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index 47018fc..6d0c45b 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -64,6 +64,9 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { { "ld_slow", VCPU_STAT(ld_slow) }, { "st", VCPU_STAT(st) }, { "st_slow", VCPU_STAT(st_slow) }, + { "pthru_all", VCPU_STAT(pthru_all) }, + { "pthru_host", VCPU_STAT(pthru_host) }, + { "pthru_bad_aff", VCPU_STAT(pthru_bad_aff) }, { NULL } }; diff --git a/arch/powerpc/kvm/book3s_hv_rm_xics.c b/arch/powerpc/kvm/book3s_hv_rm_xics.c index 5f7527e..82ff5de 100644 --- a/arch/powerpc/kvm/book3s_hv_rm_xics.c +++ b/arch/powerpc/kvm/book3s_hv_rm_xics.c @@ -716,11 +716,19 @@ int kvmppc_rm_h_eoi(struct kvm_vcpu *vcpu, unsigned long xirr) icp->rm_eoied_irq = irq; } - if (state->host_irq && state->intr_cpu != -1) { - int pcpu = cpu_first_thread_sibling(raw_smp_processor_id()); - if (state->intr_cpu != pcpu) - xics_opal_rm_set_server(state->host_irq, pcpu); - state->intr_cpu = -1; + if (state->host_irq) { + ++vcpu->stat.pthru_all; + if (state->intr_cpu != -1) { + int pcpu = raw_smp_processor_id(); + + pcpu = cpu_first_thread_sibling(pcpu); + ++vcpu->stat.pthru_host; + if (state->intr_cpu != pcpu) { + ++vcpu->stat.pthru_bad_aff; + xics_opal_rm_set_server(state->host_irq, pcpu); + } + state->intr_cpu = -1; + } } bail: return check_too_hard(xics, icp); -- 2.8.1
WARNING: multiple messages have this Message-ID (diff)
From: Paul Mackerras <paulus@ozlabs.org> To: kvm@vger.kernel.org, linuxppc-dev@ozlabs.org Cc: kvm-ppc@vger.kernel.org Subject: [PATCH 13/13] KVM: PPC: Book3S HV: Counters for passthrough IRQ stats Date: Fri, 19 Aug 2016 05:35:57 +0000 [thread overview] Message-ID: <1471584957-21484-14-git-send-email-paulus@ozlabs.org> (raw) In-Reply-To: <1471584957-21484-1-git-send-email-paulus@ozlabs.org> From: Suresh Warrier <warrier@linux.vnet.ibm.com> Add VCPU stat counters to track affinity for passthrough interrupts. pthru_all: Counts all passthrough interrupts whose IRQ mappings are in the kvmppc_passthru_irq_map structure. pthru_host: Counts all cached passthrough interrupts that were injected from the host through kvm_set_irq (i.e. not handled in real mode). pthru_bad_aff: Counts how many cached passthrough interrupts have bad affinity (receiving CPU is not running VCPU that is the target of the virtual interrupt in the guest). Signed-off-by: Suresh Warrier <warrier@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@ozlabs.org> --- arch/powerpc/include/asm/kvm_host.h | 3 +++ arch/powerpc/kvm/book3s.c | 3 +++ arch/powerpc/kvm/book3s_hv_rm_xics.c | 18 +++++++++++++----- 3 files changed, 19 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 3eb5092..f371a23 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -131,6 +131,9 @@ struct kvm_vcpu_stat { u32 ld_slow; u32 st_slow; #endif + u32 pthru_all; + u32 pthru_host; + u32 pthru_bad_aff; }; enum kvm_exit_types { diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index 47018fc..6d0c45b 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -64,6 +64,9 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { { "ld_slow", VCPU_STAT(ld_slow) }, { "st", VCPU_STAT(st) }, { "st_slow", VCPU_STAT(st_slow) }, + { "pthru_all", VCPU_STAT(pthru_all) }, + { "pthru_host", VCPU_STAT(pthru_host) }, + { "pthru_bad_aff", VCPU_STAT(pthru_bad_aff) }, { NULL } }; diff --git a/arch/powerpc/kvm/book3s_hv_rm_xics.c b/arch/powerpc/kvm/book3s_hv_rm_xics.c index 5f7527e..82ff5de 100644 --- a/arch/powerpc/kvm/book3s_hv_rm_xics.c +++ b/arch/powerpc/kvm/book3s_hv_rm_xics.c @@ -716,11 +716,19 @@ int kvmppc_rm_h_eoi(struct kvm_vcpu *vcpu, unsigned long xirr) icp->rm_eoied_irq = irq; } - if (state->host_irq && state->intr_cpu != -1) { - int pcpu = cpu_first_thread_sibling(raw_smp_processor_id()); - if (state->intr_cpu != pcpu) - xics_opal_rm_set_server(state->host_irq, pcpu); - state->intr_cpu = -1; + if (state->host_irq) { + ++vcpu->stat.pthru_all; + if (state->intr_cpu != -1) { + int pcpu = raw_smp_processor_id(); + + pcpu = cpu_first_thread_sibling(pcpu); + ++vcpu->stat.pthru_host; + if (state->intr_cpu != pcpu) { + ++vcpu->stat.pthru_bad_aff; + xics_opal_rm_set_server(state->host_irq, pcpu); + } + state->intr_cpu = -1; + } } bail: return check_too_hard(xics, icp); -- 2.8.1
next prev parent reply other threads:[~2016-08-19 5:36 UTC|newest] Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-08-19 5:35 [PATCH 00/13] Real-mode acceleration of device interrupts in HV KVM Paul Mackerras 2016-08-19 5:35 ` Paul Mackerras 2016-08-19 5:35 ` [PATCH 01/13] powerpc: Add simple cache inhibited MMIO accessors Paul Mackerras 2016-08-19 5:35 ` Paul Mackerras 2016-08-19 5:35 ` [PATCH 02/13] KVM: PPC: Book3S HV: Convert kvmppc_read_intr to a C function Paul Mackerras 2016-08-19 5:35 ` Paul Mackerras 2016-08-19 5:35 ` [PATCH 03/13] KVM: PPC: select IRQ_BYPASS_MANAGER Paul Mackerras 2016-08-19 5:35 ` Paul Mackerras 2016-08-19 5:35 ` [PATCH 04/13] KVM: PPC: Book3S HV: Introduce kvmppc_passthru_irqmap Paul Mackerras 2016-08-19 5:35 ` Paul Mackerras 2016-08-19 5:35 ` [PATCH 05/13] powerpc/powernv: Provide facilities for EOI, usable from real mode Paul Mackerras 2016-08-19 5:35 ` Paul Mackerras 2016-08-19 5:35 ` [PATCH 06/13] KVM: PPC: Book3S HV: Enable IRQ bypass Paul Mackerras 2016-08-19 5:35 ` Paul Mackerras 2016-08-19 5:35 ` [PATCH 07/13] KVM: PPC: Book3S HV: Handle passthrough interrupts in guest Paul Mackerras 2016-08-19 5:35 ` Paul Mackerras 2016-09-12 0:53 ` [PATCH v2 " Paul Mackerras 2016-09-12 0:53 ` Paul Mackerras 2016-08-19 5:35 ` [PATCH 08/13] KVM: PPC: Book3S HV: Complete passthrough interrupt in host Paul Mackerras 2016-08-19 5:35 ` Paul Mackerras 2016-08-19 5:35 ` [PATCH 09/13] KVM: PPC: Book3S HV: Dump irqmap in debugfs Paul Mackerras 2016-08-19 5:35 ` Paul Mackerras 2016-08-19 5:35 ` [PATCH 10/13] KVM: PPC: Book3S HV: Tunable to disable KVM IRQ bypass Paul Mackerras 2016-08-19 5:35 ` Paul Mackerras 2016-08-19 5:35 ` [PATCH 11/13] KVM: PPC: Book3S HV: Update irq stats for IRQs handled in real mode Paul Mackerras 2016-08-19 5:35 ` Paul Mackerras 2016-08-19 5:35 ` [PATCH 12/13] KVM: PPC: Book3S HV: Set server for passed-through interrupts Paul Mackerras 2016-08-19 5:35 ` Paul Mackerras 2016-08-19 5:35 ` Paul Mackerras [this message] 2016-08-19 5:35 ` [PATCH 13/13] KVM: PPC: Book3S HV: Counters for passthrough IRQ stats Paul Mackerras 2016-09-12 0:55 ` [PATCH 00/13] Real-mode acceleration of device interrupts in HV KVM Paul Mackerras 2016-09-12 0:55 ` Paul Mackerras
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