From: Christian Borntraeger <borntraeger@de.ibm.com>
To: Suraj Jitindar Singh <sjitindarsingh@gmail.com>,
linuxppc-dev@lists.ozlabs.org, pbonzini@redhat.com
Cc: kvm-ppc@vger.kernel.org, kvm@vger.kernel.org, mpe@ellerman.id.au,
paulus@samba.org, benh@kernel.crashing.org, agraf@suse.com,
rkrcmar@redhat.com, dmatlack@google.com
Subject: Re: [PATCH V4 5/5] powerpc/kvm/stats: Implement existing and add new halt polling vcpu stats
Date: Tue, 19 Jul 2016 08:41:21 +0000 [thread overview]
Message-ID: <578DE7B1.4000506@de.ibm.com> (raw)
In-Reply-To: <1468915977-26929-5-git-send-email-sjitindarsingh@gmail.com>
On 07/19/2016 10:12 AM, Suraj Jitindar Singh wrote:
> Also add new vcpu stats: halt_poll_success_ns, halt_poll_fail_ns and
> halt_wait_ns to be used to accumulate the total time spend polling
> successfully, polling unsuccessfully and waiting respectively, and
> halt_successful_wait to accumulate the number of times the vcpu waits.
> Given that halt_poll_success_ns, halt_poll_fail_ns and halt_wait_ns are
> expressed in nanoseconds it is necessary to represent these as 64-bit
> quantities, otherwise they would overflow after only about 4 seconds.
Paolo, would these new kvm_stats also be useful for the base implementation?
WARNING: multiple messages have this Message-ID (diff)
From: Christian Borntraeger <borntraeger@de.ibm.com>
To: Suraj Jitindar Singh <sjitindarsingh@gmail.com>,
linuxppc-dev@lists.ozlabs.org, pbonzini@redhat.com
Cc: kvm-ppc@vger.kernel.org, kvm@vger.kernel.org, mpe@ellerman.id.au,
paulus@samba.org, benh@kernel.crashing.org, agraf@suse.com,
rkrcmar@redhat.com, dmatlack@google.com
Subject: Re: [PATCH V4 5/5] powerpc/kvm/stats: Implement existing and add new halt polling vcpu stats
Date: Tue, 19 Jul 2016 10:41:21 +0200 [thread overview]
Message-ID: <578DE7B1.4000506@de.ibm.com> (raw)
In-Reply-To: <1468915977-26929-5-git-send-email-sjitindarsingh@gmail.com>
On 07/19/2016 10:12 AM, Suraj Jitindar Singh wrote:
> Also add new vcpu stats: halt_poll_success_ns, halt_poll_fail_ns and
> halt_wait_ns to be used to accumulate the total time spend polling
> successfully, polling unsuccessfully and waiting respectively, and
> halt_successful_wait to accumulate the number of times the vcpu waits.
> Given that halt_poll_success_ns, halt_poll_fail_ns and halt_wait_ns are
> expressed in nanoseconds it is necessary to represent these as 64-bit
> quantities, otherwise they would overflow after only about 4 seconds.
Paolo, would these new kvm_stats also be useful for the base implementation?
next prev parent reply other threads:[~2016-07-19 8:41 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-19 8:12 [PATCH V4 1/5] kvm/ppc/book3s: Move struct kvmppc_vcore from kvm_host.h to kvm_book3s.h Suraj Jitindar Singh
2016-07-19 8:12 ` Suraj Jitindar Singh
2016-07-19 8:12 ` [PATCH V4 2/5] kvm/ppc/book3s_hv: Change vcore element runnable_threads from linked-list to array Suraj Jitindar Singh
2016-07-19 8:12 ` Suraj Jitindar Singh
2016-07-19 8:12 ` [PATCH V4 3/5] kvm/ppc/book3s_hv: Implement halt polling in the kvm_hv kernel module Suraj Jitindar Singh
2016-07-19 8:12 ` Suraj Jitindar Singh
2016-07-19 8:38 ` Christian Borntraeger
2016-07-19 8:38 ` Christian Borntraeger
2016-07-19 18:58 ` David Matlack
2016-07-19 18:58 ` David Matlack
2016-07-21 9:24 ` Suraj Jitindar Singh
2016-07-21 9:24 ` Suraj Jitindar Singh
2016-07-19 8:12 ` [PATCH V4 4/5] kvm/stats: Add provisioning for ulong vm stats and u64 vcpu stats Suraj Jitindar Singh
2016-07-19 8:12 ` Suraj Jitindar Singh
2016-07-19 8:52 ` Christian Borntraeger
2016-07-19 8:52 ` Christian Borntraeger
2016-07-19 19:17 ` David Matlack
2016-07-19 19:17 ` David Matlack
2016-07-19 8:12 ` [PATCH V4 5/5] powerpc/kvm/stats: Implement existing and add new halt polling " Suraj Jitindar Singh
2016-07-19 8:12 ` Suraj Jitindar Singh
2016-07-19 8:41 ` Christian Borntraeger [this message]
2016-07-19 8:41 ` Christian Borntraeger
2016-07-19 19:20 ` David Matlack
2016-07-19 19:20 ` David Matlack
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