From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: Paul Mackerras <paulus@ozlabs.org>
Cc: benh@kernel.crashing.org, mpe@ellerman.id.au,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH 00/16] Remove hash page table slot tracking from linux PTE
Date: Tue, 21 Nov 2017 14:11:44 +0530 [thread overview]
Message-ID: <871sks10s7.fsf@linux.vnet.ibm.com> (raw)
In-Reply-To: <20171027054136.GC27483@fergus.ozlabs.ibm.com>
Paul Mackerras <paulus@ozlabs.org> writes:
> On pseries, performance is about 2.4% worse without new hcalls, but
> that is less than 1 standard deviation. With new hcalls, performance
> is 0.95% worse, only a third of a standard deviation. I think we need
> to do more measurements to try to get a more accurate picture here.
>
> Were the pseries numbers done on KVM or PowerVM? Could you do a set
> of measurements on the other one too please? (I assume the numbers
> with the new hcall were done on KVM, and can't be done on PowerVM.)
>
I got ebizzy and kernel compile run on powernv and powervm config. You
can find the numbers below. I did 10 iterations and only added stdev and
median below. I do find powernv do better with patch series.
ebizzy run
-----------
PowerNV (ebizzy -m -n 1000 -P -s 512000 -S 100 -t 100):
With patches, 10 iterations results records/sec.
stdev = 37.60
median = 7411.5
Without patch:
stdev = 23.071
median = 7350
PowerVM numbers(./ebizzy -m -n 1000 -P -s 512000 -S 100 -t 30):
With patch (no new hcalls):
stdev = 20.721
median = 6955.5
Without patch
stdev = 35.049
median = 7081
kernel compile:(time -p)
---------------------------
PowerNV:
With patches:
Real
----
stdev = 1.624
median = 61.56
User:
stdev = 61.204
median = 4816.73
Sys:
stdev = 4.367
median = 387.575
Without patches:
Real:
stdev = 1.318
median = 63.635
User:
stdev = 50.531
median = 4820.51
Sys:
stdev = 6.409
median = 389.765
PowerVM numbers:
-------------------
With patches (no new hcalls):
Real:
stdev = 3.016
median = 442.745
User:
stdev = 9.738
median = 5507.87
Sys:
stdev = 0.223
median = 176.455
Witout patches:
Real:
stdev = 0.720
median = 442.445
User:
stdev = 8.621
median = 5501.615
Sys:
stdev = 0.189
median = 173.3
next prev parent reply other threads:[~2017-11-21 8:41 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-27 4:08 [PATCH 00/16] Remove hash page table slot tracking from linux PTE Aneesh Kumar K.V
2017-10-27 4:08 ` [PATCH 01/16] powerpc/mm/hash: Remove the superfluous bitwise operation when find hpte group Aneesh Kumar K.V
2017-10-27 4:08 ` [PATCH 02/16] powerpc/mm: Update native_hpte_find to return hash pte Aneesh Kumar K.V
2017-10-27 4:08 ` [PATCH 03/16] powerpc/pseries: Update hpte find helper to take hash value Aneesh Kumar K.V
2017-10-27 4:08 ` [PATCH 04/16] powerpc/mm: Add hash invalidate callback Aneesh Kumar K.V
2017-10-27 4:08 ` [PATCH 05/16] powerpc/mm: use hash_invalidate for __kernel_map_pages() Aneesh Kumar K.V
2017-10-27 4:08 ` [PATCH 06/16] powerpc/mm: Switch flush_hash_range to not use slot Aneesh Kumar K.V
2017-10-27 4:08 ` [PATCH 07/16] powerpc/mm: Add hash updatepp callback Aneesh Kumar K.V
2017-10-27 4:08 ` [PATCH 08/16] powerpc/mm/hash: Don't track hash pte slot number in linux page table Aneesh Kumar K.V
2017-10-27 4:08 ` [PATCH 09/16] powerpc/mm: Add new firmware feature HASH API Aneesh Kumar K.V
2017-10-27 4:08 ` [PATCH 10/16] powerpc/kvm/hash: Implement HASH_REMOVE hcall Aneesh Kumar K.V
2017-10-27 4:08 ` [PATCH 11/16] powerpc/kvm/hash: Implement HASH_PROTECT hcall Aneesh Kumar K.V
2017-10-27 4:08 ` [PATCH 12/16] powerpc/kvm/hash: Implement HASH_BULK_REMOVE hcall Aneesh Kumar K.V
2017-10-27 4:08 ` [PATCH 13/16] powerpc/mm/pseries: Use HASH_PROTECT hcall in guest Aneesh Kumar K.V
2017-10-27 4:08 ` [PATCH 14/16] powerpc/mm/pseries: Use HASH_REMOVE " Aneesh Kumar K.V
2017-10-27 4:08 ` [PATCH 15/16] powerpc/mm/pseries: Move slot based bulk remove to helper Aneesh Kumar K.V
2017-10-27 4:08 ` [PATCH 16/16] powerpc/mm/pseries: Use HASH_BULK_REMOVE hcall in guest Aneesh Kumar K.V
2017-10-27 4:34 ` [PATCH 00/16] Remove hash page table slot tracking from linux PTE Paul Mackerras
2017-10-27 5:27 ` Aneesh Kumar K.V
2017-10-27 5:41 ` Paul Mackerras
2017-10-30 7:57 ` Aneesh Kumar K.V
2017-10-30 11:49 ` Aneesh Kumar K.V
2017-10-30 13:14 ` Aneesh Kumar K.V
2017-10-30 13:49 ` Aneesh Kumar K.V
2017-11-21 8:41 ` Aneesh Kumar K.V [this message]
2017-10-28 22:35 ` Ram Pai
2017-10-29 14:05 ` Aneesh Kumar K.V
2017-10-29 22:04 ` Paul Mackerras
2017-10-30 0:51 ` Ram Pai
2017-11-01 4:46 ` Michael Ellerman
2017-11-01 11:02 ` Paul Mackerras
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