Messages in this thread | | | Date | Mon, 2 Feb 2009 03:29:03 +0100 | Subject | Re: libata - anomaly performance with NCQ | From | Bartosz SKOWRON <> |
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On Sat, Jan 31, 2009 at 6:18 AM, Robert Hancock <hancockrwd@gmail.com> wrote:
> bonnie++ is one I've used, I'm sure there are others.. Of course, what do > you compare the results to..
Hmmm more tests == more confusions ;-)
NCQ ENABLED:
Version 1.03b ------Sequential Output------ --Sequential Input- --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP banan 6G 32681 99 81220 35 37915 31 32675 99 88157 28 286.0 0 ------Sequential Create------ --------Random Create-------- -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP 16 3115 32 +++++ +++ 3774 38 3321 38 +++++ +++ 1004 10
NCQ DISABLED: Version 1.03b ------Sequential Output------ --Sequential Input- --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP banan 6G 32617 99 84305 36 36022 16 32889 99 88199 28 233.9 0 ------Sequential Create------ --------Random Create-------- -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP 16 3866 40 +++++ +++ 5538 48 3668 38 +++++ +++ 1093 11
So it looks very similar but without ncq looks a bit better, doesn't it?
something practical test: copy a movie file (~750MB) into /tmp (tmpfs): ncq: ~70-75MB/s noncq: ~65-70MB/s
and hdparm once again:
ncq: Timing buffered disk reads: 108 MB in 3.06 seconds = 35.33 MB/sec noncq: Timing buffered disk reads: 258 MB in 3.01 seconds = 85.63 MB/sec
Can you or anyone else analyze those results? They confuse me a lot cause they are sometimes in a conflict. And what results of bonnie++ should i compare to other tests? sequintal output:block ? or per?
and here is my hdd: Model=ST9320421AS , FwRev=SD13 , SerialNo= 5TJ0DGSP Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% } RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4 BuffType=unknown, BuffSize=16384kB, MaxMultSect=16, MultSect=?16? CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=625142448 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: mdma0 mdma1 mdma2 UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6 AdvancedPM=yes: unknown setting WriteCache=enabled Drive conforms to: unknown: ATA/ATAPI-4,5,6,7
regards, bart
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