From: "Shi, Yang" <yang.shi@linaro.org>
To: Jerome Marchand <jmarchan@redhat.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Hugh Dickins <hughd@google.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Dave Hansen <dave.hansen@intel.com>,
Vlastimil Babka <vbabka@suse.cz>,
Christoph Lameter <cl@gentwo.org>,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
Sasha Levin <sasha.levin@oracle.com>,
Andres Lagar-Cavilla <andreslc@google.com>,
Ning Qu <quning@gmail.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-fsdevel@vger.kernel.org
Subject: Re: [PATCHv7 00/29] THP-enabled tmpfs/shmem using compound pages
Date: Tue, 19 Apr 2016 09:11:55 -0700 [thread overview]
Message-ID: <571658CB.9080205@linaro.org> (raw)
In-Reply-To: <571641AC.1050801@redhat.com>
On 4/19/2016 7:33 AM, Jerome Marchand wrote:
> On 04/19/2016 12:55 AM, Shi, Yang wrote:
>> 2. I ran my THP test (generated a program with 4MB text section) on both
>> x86-64 and ARM64 with yours and Hugh's patches (linux-next tree), I got
>> the program execution time reduced by ~12% on x86-64, it looks very
>> impressive.
>>
>> But, on ARM64, there is just ~3% change, and sometimes huge tmpfs may
>> show even worse data than non-hugepage.
>>
>> Both yours and Hugh's patches has the same behavior.
>>
>> Any idea?
>
> Just a shot in the dark, but what page size do you use? If you use 4k
> pages, then hugepage size should be the same as on x86 and a similar
I do use 4K pages for both x86-64 and ARM64 in my testing.
Thanks,
Yang
> behavior could be expected. Otherwise, hugepages would be too big to be
> taken advantage of by your test program.
>
> Jerome
>
WARNING: multiple messages have this Message-ID (diff)
From: "Shi, Yang" <yang.shi@linaro.org>
To: Jerome Marchand <jmarchan@redhat.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Hugh Dickins <hughd@google.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Dave Hansen <dave.hansen@intel.com>,
Vlastimil Babka <vbabka@suse.cz>,
Christoph Lameter <cl@gentwo.org>,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
Sasha Levin <sasha.levin@oracle.com>,
Andres Lagar-Cavilla <andreslc@google.com>,
Ning Qu <quning@gmail.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-fsdevel@vger.kernel.org
Subject: Re: [PATCHv7 00/29] THP-enabled tmpfs/shmem using compound pages
Date: Tue, 19 Apr 2016 09:11:55 -0700 [thread overview]
Message-ID: <571658CB.9080205@linaro.org> (raw)
In-Reply-To: <571641AC.1050801@redhat.com>
On 4/19/2016 7:33 AM, Jerome Marchand wrote:
> On 04/19/2016 12:55 AM, Shi, Yang wrote:
>> 2. I ran my THP test (generated a program with 4MB text section) on both
>> x86-64 and ARM64 with yours and Hugh's patches (linux-next tree), I got
>> the program execution time reduced by ~12% on x86-64, it looks very
>> impressive.
>>
>> But, on ARM64, there is just ~3% change, and sometimes huge tmpfs may
>> show even worse data than non-hugepage.
>>
>> Both yours and Hugh's patches has the same behavior.
>>
>> Any idea?
>
> Just a shot in the dark, but what page size do you use? If you use 4k
> pages, then hugepage size should be the same as on x86 and a similar
I do use 4K pages for both x86-64 and ARM64 in my testing.
Thanks,
Yang
> behavior could be expected. Otherwise, hugepages would be too big to be
> taken advantage of by your test program.
>
> Jerome
>
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next prev parent reply other threads:[~2016-04-19 16:11 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-16 0:23 [PATCHv7 00/29] THP-enabled tmpfs/shmem using compound pages Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 01/29] thp, mlock: update unevictable-lru.txt Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 02/29] mm: do not pass mm_struct into handle_mm_fault Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 03/29] mm: introduce fault_env Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 04/29] mm: postpone page table allocation until we have page to map Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 05/29] rmap: support file thp Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 06/29] mm: introduce do_set_pmd() Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 07/29] thp, vmstats: add counters for huge file pages Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 08/29] thp: support file pages in zap_huge_pmd() Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 09/29] thp: handle file pages in split_huge_pmd() Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 10/29] thp: handle file COW faults Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 11/29] thp: skip file huge pmd on copy_huge_pmd() Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 12/29] thp: prepare change_huge_pmd() for file thp Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 13/29] thp: run vma_adjust_trans_huge() outside i_mmap_rwsem Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 14/29] thp: file pages support for split_huge_page() Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 15/29] thp, mlock: do not mlock PTE-mapped file huge pages Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 16/29] vmscan: split file huge pages before paging them out Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 17/29] page-flags: relax policy for PG_mappedtodisk and PG_reclaim Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 18/29] radix-tree: implement radix_tree_maybe_preload_order() Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 19/29] filemap: prepare find and delete operations for huge pages Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 20/29] truncate: handle file thp Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 21/29] mm, rmap: account shmem thp pages Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 22/29] shmem: prepare huge= mount option and sysfs knob Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 23/29] shmem: get_unmapped_area align huge page Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 24/29] shmem: add huge pages support Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 25/29] shmem, thp: respect MADV_{NO,}HUGEPAGE for file mappings Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 26/29] thp: update Documentation/vm/transhuge.txt Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 27/29] thp: extract khugepaged from mm/huge_memory.c Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:23 ` [PATCHv7 28/29] khugepaged: move up_read(mmap_sem) out of khugepaged_alloc_page() Kirill A. Shutemov
2016-04-16 0:23 ` Kirill A. Shutemov
2016-04-16 0:24 ` [PATCHv7 29/29] khugepaged: add support of collapse for tmpfs/shmem pages Kirill A. Shutemov
2016-04-16 0:24 ` Kirill A. Shutemov
2016-04-18 22:55 ` [PATCHv7 00/29] THP-enabled tmpfs/shmem using compound pages Shi, Yang
2016-04-18 22:55 ` Shi, Yang
2016-04-19 14:33 ` Jerome Marchand
2016-04-19 16:11 ` Shi, Yang [this message]
2016-04-19 16:11 ` Shi, Yang
2016-04-19 16:50 ` Andrea Arcangeli
2016-04-19 16:50 ` Andrea Arcangeli
2016-04-19 17:07 ` Andres Lagar-Cavilla
2016-04-19 17:07 ` Andres Lagar-Cavilla
2016-04-24 5:46 ` Wincy Van
2016-04-24 5:46 ` Wincy Van
2016-04-25 13:30 ` Andres Lagar-Cavilla
2016-04-25 13:30 ` Andres Lagar-Cavilla
2016-04-26 14:02 ` Wincy Van
2016-04-26 14:02 ` Wincy Van
2016-04-27 15:48 ` Andrea Arcangeli
2016-04-27 15:48 ` Andrea Arcangeli
2016-04-19 23:48 ` Shi, Yang
2016-04-19 23:48 ` Shi, Yang
2016-04-20 8:31 ` Hugh Dickins
2016-04-20 8:31 ` Hugh Dickins
2016-04-20 8:31 ` Hugh Dickins
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