Firefox/4.0b8pre SeaMonkey/2.1b2pre   
   jhg2WoAH3NODNb8^CT1A^BL@[>4DY[3AA]aK5@h;04E8nEh7aH^eSKk>^o>   
   From: Lars Erdmann    
      
   Allan wrote:   
   > On Thu, 9 Dec 2010 23:03:57 UTC, Lars Erdmann  wrote:   
   >   
   >> I have again updated the USB host controller drivers USBUHCD.   
   YS,USBOHCD.SYS,USBEHCD.SYS.   
   >   
   > Tried these too. They are also slow, compared to patched IBM driver.   
   >   
   >> However, it is a long time ago, that a patch was made available   
   >> to the USBEHCD IBM driver, that made it almost twice as fast here.   
   >>   
   >> Why didn't you pick that up ?   
   >>   
   > 1.) Because I don't know the source location   
   >   
   > Took me 2 minutes to find the same pattern as the original patch changed.   
   > For this version of yours, I used this patchfile:   
   >   
   > FILE USBEHCD2a.SYS   
   > VER 4F34 FF76F2   
   > CHA 4F34 6A0190   
   >   
   > I assume you can find this place in your own sources.   
      
   FF 76 F2 =  push    WORD PTR [bp-14]   
      
   (6A 01 90 =  push    1, nop)   
      
   FF 76 F2 is used all over the place. How can you be so sure that you patched   
   the CORRECT location ?   
   Anyway, maybe I can identify the correct spot.   
      
   >   
   >   
   > 2.) Because it increases IRQ load   
   >   
   > Of course it increeses IRQ load, when it is faster - did you expect anything   
   else ?   
   > Here, transfering a file, IRQ load with your driver is 0.5%   
   > with the patch, it is 0.8%  Hardly anything anyone would notice.   
   > Read speed goes from 6.5 ->  10.5MB/s   
   > Write speed goes from 5,4 ->  8,1MB/s   with this patch   
   >   
   > Maybe you can add a cmd line parameter, to set this.   
      
   There are people that believe it to be more important to not disturb timing   
   sensitive applications.   
   At least that's a request from someone else. But a parameter to control this   
   is certainly feasible.   
   I'll think about it. But please be aware that I am working on this in my FREE   
   TIME.   
   I have a job to earn a living.   
      
   Lars   
      
   --- Internet Rex 2.31   
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