Impressive performance improvements with 2.1.120 & pre7 !

Anthony Ginepro ang at mail.dotcom.fr
Sat Sep 5 08:39:13 PDT 1998


	I just have one word to express what I feel: WOW !
I'm just having awesome performance compared with 2.1.119 & pre7,
here are some numbers (timing with my watch) :

					2.1.119	2.1.120
*xemacs reloading after 1 start :	+6s	2s
*netscape reloading after 1 start:     +12s     4s

(+ means slightly more than)

	So these show more than 3times faster reloading !!
(I don't have numbers for the 1st time loading but this
combination definitely kills anything else...)

	I dunno right now if it comes more than the kernel or
the aic7xxx driver but I at least say that my HD wasn't this
fast before pre7, so Doug you did an excellent job with the 
driver.

	Here are some infos about my configuration if that
can help some people :

kernel: Linux version 2.1.120 (ag at forge.localdomain) 
-------	(gcc version pgcc-2.91.55 19980824 (gcc2 ss-980609 experimental)) 
	#1 Sat Sep 5 16:59:44 CEST 1998

compilation options: -O6 -mamdk6 -ffast-math -fomit-frame-pointer
--------------------   (Yes, I have an AMD-K6 200Mhz & 64Mo SDram)

aic7xxx driver (/proc/aic7xxx/0): (with AIC7XXX_FAKE_NEGOCIATION_CMDS & VERBOSE_DEBUGGING)
---------------------------------
Adaptec AIC7xxx driver version: 5.1.0pre7/3.2.4
Compile Options:
  AIC7XXX_RESET_DELAY    : 5
  AIC7XXX_TAGGED_QUEUEING: Adapter Support Enabled
                             Check below to see which
                             devices use tagged queueing
  AIC7XXX_PAGE_ENABLE    : Enabled (This is no longer an option)
  AIC7XXX_PROC_STATS     : Disabled

Adapter Configuration:
           SCSI Adapter: Adaptec AHA-2940A Ultra SCSI host adapter
                           Ultra Narrow Controller
    PCI MMAPed I/O Base: 0xe4000000
      Adaptec SCSI BIOS: Enabled
                    IRQ: 11
                   SCBs: Active 1, Max Active 18,
                         Allocated 30, HW 3, Page 255
             Interrupts: 10801
      BIOS Control Word: 0x10b6
   Adapter Control Word: 0x005e
   Extended Translation: Enabled
Disconnect Enable Flags: 0x00ff
     Ultra Enable Flags: 0x008a
 Tag Queue Enable Flags: 0x000a
Ordered Queue Tag Flags: 0x000a
Default Tag Queue Depth: 24
    Tagged Queue By Device array for aic7xxx host instance 0:
      {255,16,255,8,255,255,255,255,255,255,255,255,255,255,255,255}
    Actual queue depth per device for aic7xxx host instance 0:
      {1,16,1,8,1,1,1,1,1,1,1,1,1,1,1,1}

Statistics:
(scsi0:0:1:0)
  Device using Narrow/Sync transfers at
  20.0 MByte/sec, offset 15
    Total transfers 10450 (8375 read;2075 written)
      blks(512) rd=65967; blks(512) wr=6898


(scsi0:0:3:0)
  Device using Narrow/Sync transfers at
  20.0 MByte/sec, offset 15
    Total transfers 307 (305 read;2 written)
      blks(512) rd=851; blks(512) wr=4

Hard Drives configuration: (/proc/scsi)
---------------------------------------
Attached devices: 
Host: scsi0 Channel: 00 Id: 01 Lun: 00
  Vendor: IBM      Model: DCAS-34330       Rev: S65A
  Type:   Direct-Access                    ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 03 Lun: 00
  Vendor: QUANTUM  Model: FIREBALL_TM3200S Rev: 300X
  Type:   Direct-Access                    ANSI SCSI revision: 02

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