linux-kernel - Re: [PATCH 01/29] iov_iter: Switch to using a table of operations

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Date:   Tue, 24 Nov 2020 12:50:22 +0000
From:   David Howells <dhowells@...hat.com>
To:     Pavel Begunkov <asml.silence@...il.com>
Cc:     dhowells@...hat.com, Christoph Hellwig <hch@...radead.org>,
        Matthew Wilcox <willy@...radead.org>,
        Jens Axboe <axboe@...nel.dk>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-fsdevel@...r.kernel.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/29] iov_iter: Switch to using a table of operations

Pavel Begunkov <asml.silence@...il.com> wrote:

> fio is relatively heavy, I'd suggest to try fio/t/io_uring with nullblk

no patches:

IOPS=885152, IOS/call=25/25, inflight=64 (64)
IOPS=890400, IOS/call=25/25, inflight=32 (32)
IOPS=890656, IOS/call=25/25, inflight=64 (64)
IOPS=896096, IOS/call=25/25, inflight=96 (96)
IOPS=876256, IOS/call=25/25, inflight=128 (128)
IOPS=905056, IOS/call=25/25, inflight=128 (128)
IOPS=882912, IOS/call=25/25, inflight=96 (96)
IOPS=887392, IOS/call=25/25, inflight=64 (32)
IOPS=897152, IOS/call=25/25, inflight=128 (128)
IOPS=871392, IOS/call=25/25, inflight=32 (32)
IOPS=865088, IOS/call=25/25, inflight=96 (96)
IOPS=880032, IOS/call=25/25, inflight=32 (32)
IOPS=905376, IOS/call=25/25, inflight=96 (96)
IOPS=898016, IOS/call=25/25, inflight=128 (128)
IOPS=885792, IOS/call=25/25, inflight=64 (64)
IOPS=897632, IOS/call=25/25, inflight=96 (96)

first patch only:

IOPS=876640, IOS/call=25/25, inflight=64 (64)
IOPS=878208, IOS/call=25/25, inflight=64 (64)
IOPS=884000, IOS/call=25/25, inflight=64 (64)
IOPS=900864, IOS/call=25/25, inflight=64 (64)
IOPS=878496, IOS/call=25/25, inflight=64 (64)
IOPS=870944, IOS/call=25/25, inflight=32 (32)
IOPS=900672, IOS/call=25/25, inflight=32 (32)
IOPS=882368, IOS/call=25/25, inflight=128 (128)
IOPS=877120, IOS/call=25/25, inflight=128 (128)
IOPS=861856, IOS/call=25/25, inflight=64 (64)
IOPS=892896, IOS/call=25/25, inflight=96 (96)
IOPS=875808, IOS/call=25/25, inflight=128 (128)
IOPS=887808, IOS/call=25/25, inflight=32 (80)
IOPS=889984, IOS/call=25/25, inflight=128 (128)

all patches:

IOPS=872192, IOS/call=25/25, inflight=96 (96)
IOPS=887360, IOS/call=25/25, inflight=32 (32)
IOPS=894432, IOS/call=25/25, inflight=128 (128)
IOPS=884640, IOS/call=25/25, inflight=32 (32)
IOPS=886784, IOS/call=25/25, inflight=32 (32)
IOPS=884160, IOS/call=25/25, inflight=96 (96)
IOPS=886944, IOS/call=25/25, inflight=96 (96)
IOPS=903360, IOS/call=25/25, inflight=128 (128)
IOPS=887744, IOS/call=25/25, inflight=64 (64)
IOPS=891072, IOS/call=25/25, inflight=32 (32)
IOPS=900512, IOS/call=25/25, inflight=128 (128)
IOPS=888544, IOS/call=25/25, inflight=128 (128)
IOPS=877312, IOS/call=25/25, inflight=128 (128)
IOPS=895008, IOS/call=25/25, inflight=128 (128)
IOPS=889376, IOS/call=25/25, inflight=128 (128)

David