Pulsar (pulsar@springnet1.com) wrote:
: In article <77crd9$9er$1@hecate.umd.edu>,
: davewang@cslab.kecl.ntt.co.jp.DELETE.delete.DELETE@Glue.umd.edu (David T.
: Wang) wrote:
: > I'm curious about what kind of bandwidth the new G3 boxes with 100 MHz
: > busses provide. If you've been fortunate enough to acquire one of those
: > boxes, please see if you can run Stream and collect some numbers.
: >
: > http://www.cs.virginia.edu/stream/
: I'll try it on an iMac and a first series PowerMac G3 tomorrow and report
: the results.
: PowerMac G3
: 100Mhz bus
: 400Mhz processor
: 200MHz 1 meg L2 cache
: 64 megs of RAM.
: -------------------------------------------------------------
: This system uses 8 bytes per DOUBLE PRECISION word.
: -------------------------------------------------------------
: Array size = 400000, Offset = 0
: Total memory required = 9.2 MB.
: Each test is run 10 times, but only
: the *best* time for each is used.
: -------------------------------------------------------------
: Your clock granularity/precision appears to be 17 microseconds.
: Each test below will take on the order of 20713 microseconds.
: (= 1218 clock ticks)
: Increase the size of the arrays if this shows that
: you are not getting at least 20 clock ticks per test.
: -------------------------------------------------------------
: WARNING -- The above is only a rough guideline.
: For best results, please be sure you know the
: precision of your system timer.
: STREAM PPC604 OPT
: -------------------------------------------------------------
: Function Rate (MB/s) RMS time Min time Max time
: Copy: 233.4914 0.0276 0.0274 0.0278
: Scale: 222.5236 0.0291 0.0288 0.0300
: Add: 230.6473 0.0417 0.0416 0.0419
: Triad: 212.9736 0.0452 0.0451 0.0454
: STREAM PPC601 OPT
: -------------------------------------------------------------
: Function Rate (MB/s) RMS time Min time Max time
: Copy: 236.8265 0.0272 0.0270 0.0277
: Scale: 220.6060 0.0292 0.0290 0.0294
: Add: 215.3625 0.0448 0.0446 0.0451
: Triad: 212.9878 0.0457 0.0451 0.0508
: STREAM PPC UNROLL
: -------------------------------------------------------------
: Function Rate (MB/s) RMS time Min time Max time
: Copy: 184.2999 0.0348 0.0347 0.0350
: Scale: 180.5767 0.0356 0.0354 0.0358
: Add: 185.3640 0.0519 0.0518 0.0520
: Triad: 184.6402 0.0522 0.0520 0.0531
: STREAM PPC BASE
: -------------------------------------------------------------
: Function Rate (MB/s) RMS time Min time Max time
: Copy: 178.3674 0.0360 0.0359 0.0361
: Scale: 173.3290 0.0370 0.0369 0.0371
: Add: 182.5269 0.0527 0.0526 0.0528
: Triad: 182.6693 0.0528 0.0526 0.0535
: Ryan Tokarek
: <pulsar@springnet1.com>
: <http://www.cloudmaster.ml.org/pulsar/>
Thank you. They look quite respectable. Please tell us what you get
with the iMac.
-- davewang@cslab.kecl.ntt.co.jp.I.like.green.eggs.and.ham,not.spam All statements are personal opinions Not speaking for NTT or University of Maryland Kyoto, Japan.
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