From: Sergey Senozhatsky <sergey.senozhatsky.work@gmail•com>
To: Laurent Dufour <ldufour@linux•vnet.ibm.com>
Cc: kemi <kemi.wang@intel•com>,
paulmck@linux•vnet.ibm.com, peterz@infradead•org,
akpm@linux-foundation•org, kirill@shutemov•name,
ak@linux•intel.com, mhocko@kernel•org, dave@stgolabs•net,
jack@suse•cz, Matthew Wilcox <willy@infradead•org>,
benh@kernel•crashing.org, mpe@ellerman•id.au, paulus@samba•org,
Thomas Gleixner <tglx@linutronix•de>,
Ingo Molnar <mingo@redhat•com>,
hpa@zytor•com, Will Deacon <will.deacon@arm•com>,
Sergey Senozhatsky <sergey.senozhatsky@gmail•com>,
Andrea Arcangeli <aarcange@redhat•com>,
Alexei Starovoitov <alexei.starovoitov@gmail•com>,
linux-kernel@vger•kernel.org, linux-mm@kvack•org,
haren@linux•vnet.ibm.com, khandual@linux•vnet.ibm.com,
npiggin@gmail•com, bsingharora@gmail•com,
Tim Chen <tim.c.chen@linux•intel.com>,
linuxppc-dev@lists•ozlabs.org, x86@kernel•org
Subject: Re: [v5,22/22] powerpc/mm: Add speculative page fault
Date: Mon, 6 Nov 2017 19:27:26 +0900 [thread overview]
Message-ID: <20171106102726.GB1298@jagdpanzerIV> (raw)
In-Reply-To: <c0b7f172-5d9c-eec6-540d-216b908f005f@linux.vnet.ibm.com>
On (11/02/17 15:11), Laurent Dufour wrote:
> On 26/10/2017 10:14, kemi wrote:
> > Some regression is found by LKP-tools(linux kernel performance) on this patch series
> > tested on Intel 2s/4s Skylake platform.
> > The regression result is sorted by the metric will-it-scale.per_process_ops.
>
> Hi Kemi,
>
> Thanks for reporting this, I'll try to address it by turning some features
> of the SPF path off when the process is monothreaded.
make them madvice()-able?
not all multi-threaded apps will necessarily benefit of SPF. right?
just an idea.
-ss
prev parent reply other threads:[~2017-11-06 10:27 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-11 13:52 [PATCH v5 00/22] Speculative page faults Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 01/22] x86/mm: Define CONFIG_SPF Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 02/22] powerpc/mm: " Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 03/22] mm: Dont assume page-table invariance during faults Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 04/22] mm: Prepare for FAULT_FLAG_SPECULATIVE Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 05/22] mm: Introduce pte_spinlock " Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 06/22] mm: VMA sequence count Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 07/22] mm: Protect VMA modifications using " Laurent Dufour
2017-10-26 10:18 ` Andrea Arcangeli
2017-11-02 15:16 ` Laurent Dufour
2017-11-02 17:25 ` Laurent Dufour
2017-11-02 20:08 ` Andrea Arcangeli
2017-11-06 9:47 ` Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 08/22] mm: RCU free VMAs Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 09/22] mm: Cache some VMA fields in the vm_fault structure Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 10/22] mm: Protect SPF handler against anon_vma changes Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 11/22] mm/migrate: Pass vm_fault pointer to migrate_misplaced_page() Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 12/22] mm: Introduce __lru_cache_add_active_or_unevictable Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 13/22] mm: Introduce __maybe_mkwrite() Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 14/22] mm: Introduce __vm_normal_page() Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 15/22] mm: Introduce __page_add_new_anon_rmap() Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 16/22] mm: Provide speculative fault infrastructure Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 17/22] mm: Try spin lock in speculative path Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 18/22] mm: Adding speculative page fault failure trace events Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 19/22] perf: Add a speculative page fault sw event Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 20/22] perf tools: Add support for the SPF perf event Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 21/22] x86/mm: Add speculative pagefault handling Laurent Dufour
2017-10-11 13:52 ` [PATCH v5 22/22] powerpc/mm: Add speculative page fault Laurent Dufour
2017-10-26 8:14 ` [v5,22/22] " kemi
2017-11-02 14:11 ` Laurent Dufour
2017-11-06 10:27 ` Sergey Senozhatsky [this message]
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