From mboxrd@z Thu Jan 1 00:00:00 1970 From: Fengguang Wu Subject: Re: [ext4] 71d4f7d0321: -49.6% xfstests.generic.274.seconds Date: Fri, 22 Aug 2014 09:52:23 +0800 Message-ID: <20140822015223.GA11430@localhost> References: <20140821143006.GA19943@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: linux-ext4@vger.kernel.org, LKML , lkp@01.org To: Theodore Ts'o Return-path: Content-Disposition: inline In-Reply-To: <20140821143006.GA19943@localhost> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org On Thu, Aug 21, 2014 at 10:30:06PM +0800, Fengguang Wu wrote: > Hi Ted, >=20 > We noticed increased xfstests 274's test speed and the first good > commit is 71d4f7d032149b935a26eb3ff85c6c837f3714e1 ("ext4: remove > metadata reservation checks"). >=20 > test case: snb-drag/xfstests/4HDD-ext4-generic-slow2 > snb-drag is a Sandy Bridge PC with 6G memory. >=20 > d5e03cbb0c88cd1 71d4f7d032149b935a26eb3ff=20 > --------------- -------------------------=20 > 51 =C2=B1 2% -49.6% 25 =C2=B1 1% TOTAL xfstests.= generic.274.seconds > 817 =C2=B1 1% -3.0% 792 =C2=B1 1% TOTAL time.elap= sed_time >=20 > xfstests.generic.274.seconds >=20 > 60 ++--------------------------------------------------------------= -------+ > | = | > 55 ++ .*..*.. *.. *.. = | > | .*. . .. .. = | > 50 *+.*..*. *..*..*..* *..*..*..*..* * = | > | = | > 45 ++ = | > | = | > 40 ++ = | > | = | > 35 ++ = | > | = | > 30 ++ = | > | = | > 25 O+-O--O--O--O--O---O--O--O--O--O--O--O--O--O--O--O--O---O--O--O-= -O--O--O >=20 >=20 > [*] bisect-good sample > [O] bisect-bad sample This is sweet, got another improvement: testbox/testcase/testparams: snb-drag/xfstests/4HDD-ext4-generic-mid d5e03cbb0c88cd1 71d4f7d032149b935a26eb3ff =20 --------------- ------------------------- =20 45 =C2=B1 4% -50.2% 22 =C2=B1 7% xfstests.generic.= 256.seconds 7044859 =C2=B1 2% -7.0% 6553446 =C2=B1 0% time.minor_page_f= aults 36156 =C2=B1 2% -7.0% 33638 =C2=B1 0% time.involuntary_= context_switches 171551 =C2=B1 1% -4.8% 163312 =C2=B1 0% time.voluntary_co= ntext_switches 436 =C2=B1 1% -5.7% 411 =C2=B1 0% time.elapsed_time time.voluntary_context_switches 176000 ++------------------------------------------------------------= -----+ | * *.. *.. = | 174000 ++ *.. .. : : *..* : * = | 172000 ++ .. .*.* : : + : + = | *..*..* *. : : + : + .* = | 170000 ++ : .* * *. = | = =20 168000 ++ *. = | | = | 166000 ++ = | 164000 ++ O O = | | O O O O O O O O O= O O 162000 ++ O O O O O O = | 160000 O+ O O = | | O O = | 158000 ++------------------------------------------------------------= -----+ xfstests.generic.256.seconds 60 ++-----------------------------*----------------------------------= -----+ | : : = | 55 ++ : : = | 50 ++ : : = | | .*.. .* : .*.. = | 45 *+ *.. .*..*...*..*..*. : .*. .*.. .* = | | *. *. *. *. = | 40 ++ = | | = | 35 ++ = | 30 ++ = | | = | 25 ++ O O = | O O O O O O O O O O O O= O | 20 ++----O--------O---------O--O--O-----O-----O-----O----------------= -----O Thanks, =46engguang