root@fuzzy (Dr. Michael M. Cohen) (04/27/91)
Re: The recently announced 4D4X0 systems, can you (Dave) post some details here? Is this the R4000 based system or just a faster R3000? Any ETA on the system (and on arrival of R4000 upgrades for 4D3X0 systems)? TIA, MMCohen
jeremy@perf2.asd.sgi.com (Jeremy Higdon) (04/27/91)
In article <15089@darkstar.ucsc.edu>, root@fuzzy (Dr. Michael M. Cohen) writes: > Re: The recently announced 4D4X0 systems, can you (Dave) post > some details here? Is this the R4000 based system or just a faster > R3000? Any ETA on the system (and on arrival of R4000 upgrades > for 4D3X0 systems)? > TIA, MMCohen I'm not Dave, but . . . . The 4D/400 family are 40 mhz R3000 machines. From what I've seen, there will be a 420, 440, and 480 (of course, you can also get to what would be a 460, though there is no model by that name in the periodic table I've seen). Dates you'll have to get from your salesman.
ken@uh.msc.umn.edu (Ken Chin-Purcell) (04/28/91)
Jeremy Higdon writes: > The 4D/400 family are 40 mhz R3000 machines. Has either bus (Iris or VME) gotten faster? We're hungry for throughput.... -- Ken Chin-Purcell, Graphics, AHPCRC, Minnesota Supercomputer Ctr. -- also known as ken@msc.edu and 612-626-8090
jeremy@perf2.asd.sgi.com (Jeremy Higdon) (04/30/91)
In article <3985@uc.msc.umn.edu>, ken@uh.msc.umn.edu (Ken Chin-Purcell) writes: > Jeremy Higdon writes: > > > The 4D/400 family are 40 mhz R3000 machines. > > Has either bus (Iris or VME) gotten faster? We're hungry for > throughput.... > The VME and MP buses run at the same speed, but with the 1MB second level cache, you will probably get a better cache hit rate; thus, you shouldn't need as many MP bus accesses.
jmb@patton.wpd.sgi.com (Jim Barton) (05/02/91)
In article <100399@sgi.sgi.com>, jeremy@perf2.asd.sgi.com (Jeremy Higdon) writes: |> From: jeremy@perf2.asd.sgi.com (Jeremy Higdon) |> Newsgroups: comp.sys.sgi |> Subject: Re: 4D4X0 ?? |> Message-ID: <100399@sgi.sgi.com> |> Date: 30 Apr 91 04:26:16 GMT |> Organization: Silicon Graphics, Inc., Mountain View, CA |> |> In article <3985@uc.msc.umn.edu>, ken@uh.msc.umn.edu (Ken Chin-Purcell) writes: |> > Jeremy Higdon writes: |> > |> > > The 4D/400 family are 40 mhz R3000 machines. |> > |> > Has either bus (Iris or VME) gotten faster? We're hungry for |> > throughput.... |> > |> |> The VME and MP buses run at the same speed, but with the 1MB second |> level cache, you will probably get a better cache hit rate; thus, you |> shouldn't need as many MP bus accesses. |> |> Now wait a second. The MP bus SUSTAINS 64Mb/s read bandwidth from memory, and 32Mb/s write bandwidth to memory/IO. The IO DMA engine is built to run at 32Mb/s, so that is the theoretical peak for IO bandwidth. The VMEbus PEAKS at 32Mb/s in the best of all possible worlds. Measured IO3 (POWERChannel) VMEbus performance is 24-28Mb/s with fast IO controllers. -- Jim Barton Silicon Graphics Computer Systems jmb@sgi.com
jeremy@perf2.asd.sgi.com (Jeremy Higdon) (05/03/91)
In article <1991May2.012911.10176@odin.corp.sgi.com>, jmb@patton.wpd.sgi.com (Jim Barton) writes: > In article <100399@sgi.sgi.com>, jeremy@perf2.asd.sgi.com (Jeremy Higdon) writes: > |> From: jeremy@perf2.asd.sgi.com (Jeremy Higdon) > |> Newsgroups: comp.sys.sgi > |> Subject: Re: 4D4X0 ?? > |> Message-ID: <100399@sgi.sgi.com> > |> Date: 30 Apr 91 04:26:16 GMT > |> Organization: Silicon Graphics, Inc., Mountain View, CA > |> > |> In article <3985@uc.msc.umn.edu>, ken@uh.msc.umn.edu (Ken Chin-Purcell) writes: > |> > Jeremy Higdon writes: > |> > > |> > > The 4D/400 family are 40 mhz R3000 machines. > |> > > |> > Has either bus (Iris or VME) gotten faster? We're hungry for > |> > throughput.... > |> > > |> > |> The VME and MP buses run at the same speed, ^ on the 4D/400 and the 4D/300 machines.
jeremy@perf2.asd.sgi.com (Jeremy Higdon) (05/03/91)
In article <101106@sgi.sgi.com>, jeremy@perf2.asd.sgi.com (Jeremy Higdon) writes: > In article <1991May2.012911.10176@odin.corp.sgi.com>, jmb@patton.wpd.sgi.com (Jim Barton) writes: > > In article <100399@sgi.sgi.com>, jeremy@perf2.asd.sgi.com (Jeremy Higdon) writes: > > |> From: jeremy@perf2.asd.sgi.com (Jeremy Higdon) > > |> Newsgroups: comp.sys.sgi > > |> Subject: Re: 4D4X0 ?? > > |> Message-ID: <100399@sgi.sgi.com> > > |> Date: 30 Apr 91 04:26:16 GMT > > |> Organization: Silicon Graphics, Inc., Mountain View, CA > > |> > > |> In article <3985@uc.msc.umn.edu>, ken@uh.msc.umn.edu (Ken Chin-Purcell) writes: > > |> > Jeremy Higdon writes: > > |> > > > |> > > The 4D/400 family are 40 mhz R3000 machines. > > |> > > > |> > Has either bus (Iris or VME) gotten faster? We're hungry for > > |> > throughput.... > > |> > > > |> > > |> The VME and MP buses run at the same speed, > > ^ on the 4D/400 and the > 4D/300 machines. > ^ which is not to say that the VME and MP buses run at the same speed, but that the MP bus on the 4D/400 runs at the same speed as the MP bus on the 4D/300, etc.