is any chance we could get someone from microsoft to address this issue? certain storage targets (like the ddn) are optimized for large i/o sizes. secondly, the 64k i/o doesnt match any of the "page sizes" for my hardware raid storage controllers, so i cant get cache write through (another big win).
In message <[EMAIL PROTECTED]>,"Leonid Keller" writes: >Please, do not use "Enabling large SG lists" flag (ModeFlag=2). >It violates StorPort restriction and can cause problems. >I've added it for the goal of checking performance with 1MB size buffers >and in hope, that the restriction will be soon removed. >I was working then with SP1 and StorPort driver gave me 1MB size >packets. >Seems like MS patched the StorPOrt in SP2. >As I understood from the patches to this list, SP2's StorPort ignores a >try to increase the number of physical breaks, so ModeFlag=2 won't cause >problems, but also won't work. > >About the max packet size. >>From my experience, the largest packet size with StorPort is 64K. >And it seems that there is no way to overcome this restriction. > > >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] On Behalf Of Eleanor Witiak >> Sent: Tuesday, February 05, 2008 7:47 PM >> To: chas williams - CONTRACTOR; Mirko Benz >> Cc: [email protected] >> Subject: RE: [ofw] SRP problems with WinOF 1.0.1 >> >> I'm running revision 807 (and I don't see any SRP changes >> between 807 and 1.0.1) and I too get 64k on Windows Server >> 2003 32-bit. >> >> I've also tried it on Windows Server 2003 64-bit and I see >> similar numbers. >> >> I'm actually trying to go above 64k but my issue is I can't >> seem to get pass 17 for number of physical breaks. >> >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] On Behalf Of chas >> williams - CONTRACTOR >> Sent: Tuesday, February 05, 2008 12:04 PM >> To: Mirko Benz >> Cc: [email protected] >> Subject: Re: [ofw] SRP problems with WinOF 1.0.1 >> >> In message <[EMAIL PROTECTED]>,Mirko Benz writes: >> >- Enabling large SG lists (ModeFlags = 3) does not work. >> Maximum we see >> >> >is 32k per I/O >> > >> >FMR_POOL and large I/O sizes work when using a 64 bit >> Windows version. >> >Anybody else seeing this problem? >> >> interesting. we see 64k i/o sizes on 32-bit windows (windows >> server 2003). >> >> we havent tested 64-bit windows much. >> _______________________________________________ >> ofw mailing list >> [email protected] >> http://lists.openfabrics.org/cgi-bin/mailman/listinfo/ofw >> _______________________________________________ >> ofw mailing list >> [email protected] >> http://lists.openfabrics.org/cgi-bin/mailman/listinfo/ofw >> > > _______________________________________________ ofw mailing list [email protected] http://lists.openfabrics.org/cgi-bin/mailman/listinfo/ofw
