From: Paolo Bonzini <pbonzini@redhat.com>
To: Daniel Wagner <daniel.wagner@bmw-carit.de>,
linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Paul Gortmaker <paul.gortmaker@windriver.com>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH v3 2/4] KVM: use simple waitqueue for vcpu->wq
Date: Tue, 20 Oct 2015 15:11:31 +0200 [thread overview]
Message-ID: <56263D83.1030709@redhat.com> (raw)
In-Reply-To: <1445326090-1698-3-git-send-email-daniel.wagner@bmw-carit.de>
On 20/10/2015 09:28, Daniel Wagner wrote:
> min max mean std
> count 382.000000 382.000000 382.000000 382.000000
> mean 6068.552356 269502.528796 8056.016198 3912.128273
> std 707.404966 848866.474783 1062.472704 9835.891707
> min 2335.000000 29828.000000 7337.426000 445.738750
> 25% 6004.500000 44237.500000 7471.094250 1078.834837
> 50% 6372.000000 64175.000000 7663.133700 1783.172446
> 75% 6465.500000 150384.500000 8210.771900 2759.734524
> max 6886.000000 10188451.000000 15466.434000 120469.205668
>
> After
> min max mean std
> count 300.000000 300.000000 300.000000 300.000000
> mean 5618.380000 217464.786667 7745.545114 3258.483272
> std 824.719741 516371.888369 847.391685 5632.943904
> min 3494.000000 31410.000000 7083.574800 438.445477
> 25% 4937.000000 45446.000000 7214.102850 1045.536261
> 50% 6118.000000 67023.000000 7417.330800 1699.574075
> 75% 6224.000000 134191.500000 7871.625600 2809.536185
> max 6654.000000 4570896.000000 13528.788600 52206.226799
Anything above ~10000 cycles means that the host went to C1 or
lower---the number means more or less nothing in that case.
The mean shows an improvement indeed.
Paolo
next prev parent reply other threads:[~2015-10-20 13:11 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-20 7:28 [PATCH v3 0/4] Simple wait queue support Daniel Wagner
2015-10-20 7:28 ` [PATCH v3 1/4] wait.[ch]: Introduce the simple waitqueue (swait) implementation Daniel Wagner
2015-10-26 12:04 ` Boqun Feng
2015-10-26 12:28 ` Peter Zijlstra
2015-10-26 12:59 ` Daniel Wagner
2015-10-26 13:26 ` Peter Zijlstra
2015-10-26 14:19 ` Boqun Feng
2015-11-04 10:33 ` Thomas Gleixner
2015-11-04 12:12 ` Daniel Wagner
2015-11-18 10:33 ` Peter Zijlstra
2015-11-18 15:07 ` Thomas Gleixner
2015-10-20 7:28 ` [PATCH v3 2/4] KVM: use simple waitqueue for vcpu->wq Daniel Wagner
2015-10-20 13:11 ` Paolo Bonzini [this message]
2015-10-20 14:00 ` Peter Zijlstra
2015-10-20 15:40 ` Paolo Bonzini
2015-10-20 16:06 ` Peter Zijlstra
2015-10-21 8:55 ` Paul Mackerras
2015-10-21 9:05 ` Peter Zijlstra
2015-10-21 9:10 ` Paul Mackerras
2015-10-21 9:24 ` Paul Mackerras
2015-10-21 11:13 ` Peter Zijlstra
2015-10-23 11:51 ` Daniel Wagner
2015-10-20 7:28 ` [PATCH v3 3/4] rcu: Do not call rcu_nocb_gp_cleanup() while holding rnp->lock Daniel Wagner
2015-10-20 7:28 ` [PATCH v3 4/4] rcu: use simple wait queues where possible in rcutree Daniel Wagner
2015-10-25 20:10 ` [PATCH v3 0/4] Simple wait queue support Paul E. McKenney
2015-10-26 6:34 ` Daniel Wagner
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