hpt366 driver still has very poor performance

hpt366 driver still has very poor performance

[Chris Cheney]

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I am following up to my post on August 27. This bug is also filed at

http://bugme.osdl.org/show_bug.cgi?id=1217


I did some more tests and the bug still exists in 2.6.0-test7-bk1. I found 
that running the hpt372 with a 40pin cable ATA33 is roughly twice as fast for 
writes as using the 80pin cable ATA133, there is something definitely wrong 
here. Both modes are significantly slower than when using the same 80pin cable 
ATA100 on the Intel ICH5 controller. 
 
BTW - I think the ICH5 driver has a problem as well. When I tried to use the 
same 40pin cable I used for the hpt372, to test ATA33 mode, the kernel spit 
out a lot of messages about CRC errors. 

 
Chris Cheney



hpt372 bios 2.35 40pin cable 
---------------------------- 
Version  1.03       ------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
calc             2G 18668  66 19857   7 10159   3 19851  59 30713   3 186.5   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  3182  98 +++++ +++ +++++ +++  3098  94 +++++ +++  8743  99
calc,2G,18668,66,19857,7,10159,3,19851,59,30713,3,186.5,0,16,3182,98,+++++,+++,+++++,+++,3098,94,+++++,+++,8743,99



hpt372 bios 2.35 80pin cable 
----------------------------
Version  1.03       ------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
calc             2G  9689  34  9252   3  7228   2 20321  61 43606   4 189.8   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  3113  95 +++++ +++ +++++ +++  3107  94 +++++ +++  7596  85
calc,2G,9689,34,9252,3,7228,2,20321,61,43606,4,189.8,0,16,3113,95,+++++,+++,+++++,+++,3107,94,+++++,+++,7596,85



ich5 80pin cable 
----------------
Version  1.03       ------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
calc             2G 27586  98 48814  19 21368   6 24561  74 51393   4 185.2   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  3211  99 +++++ +++ +++++ +++  3241  99 +++++ +++  8650 100
calc,2G,27586,98,48814,19,21368,6,24561,74,51393,4,185.2,0,16,3211,99,+++++,+++,+++++,+++,3241,99,+++++,+++,8650,100


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