[Disksim-users] DiskSim 4.0 - runvalid - fail - results do NOT match expected

Mon Jun 9 13:52:52 EDT 2008

We observe virtually identical results on our Win32 port of DiskSim.

Ted Wobber
MSR Silicon Valley

-----Original Message-----
From: disksim-users-bounces at ece.cmu.edu [mailto:disksim-users-bounces at ece.cmu.edu] On Behalf Of Cagdas Dirik
Sent: Sunday, June 08, 2008 2:46 PM
To: disksim-users at ece.cmu.edu
Subject: [Disksim-users] DiskSim 4.0 - runvalid - fail - results do NOT match expected

Hi,

Like Lei, when I runvalid DiskSim 4.0, I am getting mismatching results. I have
tried this on a OS 10.4 with gcc version 4.0.1. Also tried it on a linux box and
got the same mismatching outputs.

Any ideas on what the problem might be?

Thanks,

Cagdas

Hi,

I compiled the source code of disksim 4.0 successfully on my virtual machine
(Fedora Core 4), and ran runvalid and memsvalid files under the valid directory.

The results are as follows, and it seems that,
1) for runvalid, some simulation results are not the same as expected, please
see the results marked in red.
2) for memsvalid, it looks like there is no mems.g3.parv file under the valid
directory.

Thanks,

Lei

[root at smile valid]# ./runvalid

These results represent actual drive validation experiments

QUANTUM_QM39100TD-SW (rms should be about 0.378)
disksim_run_simulation(): simulated 1090389 events
rms = 0.377952

SEAGATE_ST32171W (rms should be about 0.349)
disksim_run_simulation(): simulated 1585710 events
rms = 0.347570

SEAGATE_ST34501N (rms should be about 0.318)
disksim_run_simulation(): simulated 1591859 events
rms = 0.317972

SEAGATE_ST39102LW (rms should be about 0.107)
disksim_run_simulation(): simulated 883217 events
rms = 0.106906

IBM_DNES-309170W (rms should be about 0.135)
disksim_run_simulation(): simulated 2690642 events
rms = 0.135884

QUANTUM_TORNADO (rms should be about 0.159)
disksim_run_simulation(): simulated 1094910 events
rms = 0.267721

HP_C2247_validate (rms should be about 0.090)
disksim_run_simulation(): simulated 829410 events
rms = 0.089931

HP_C3323_validate (rms should be about 0.306)
disksim_run_simulation(): simulated 1088847 events
rms = 0.305653

HP_C2490_validate (rms should be about 0.254)
disksim_run_simulation(): simulated 1068808 events
rms = 0.253762

DEC_RZ26_validate (rms should be about 0.438)
*** warning: ignoring hpl parameters for non-hpl seek type.
disksim_run_simulation(): simulated 707184 events
rms = 0.340367

The remaining tests exercise other DiskSim components

Open synthetic workload (avg. resp. should be about 47.3ms)
disksim_run_simulation(): simulated 1044524 events
IOdriver Response time average:         10.937386

Closed synthetic workload (avg. resp. should be about 87.6ms)
disksim_run_simulation(): simulated 571678 events
IOdriver Response time average:         87.819135

Mixed synthetic workload (avg. resp. should be about 24.4ms)
disksim_run_simulation(): simulated 1313881 events
IOdriver Response time average:         22.086628

RAID 5 at device driver (avg. resp. should be about 22.8ms)
disksim_run_simulation(): simulated 1974909 events
IOdriver Response time average:         22.861326

Set of disk arrays at device driver (avg. resp. should be about 33.3ms)
disksim_run_simulation(): simulated 1895981 events
Overall I/O System Response time average:       34.272035

Memory cache at controller (avg. resp. should be about 23.0ms)
disksim_run_simulation(): simulated 1396705 events
IOdriver Response time average:         24.651367

Cache device managed at controller (avg. resp. should be about 27.4ms)
disksim_run_simulation(): simulated 2123707 events
IOdriver Response time average:         28.939379

Simpledisk instead of original model (avg. resp. should be about 13.5ms)
disksim_run_simulation(): simulated 377469 events
IOdriver Response time average:         13.711596
3 different disks
(avg. resps. should be about 10.951)
disksim_run_simulation(): simulated 1044524 events
IOdriver Response time average:         10.937386
3 disks on separate controllers
(avg. resps. should be about 10.951)
disksim_run_simulation(): simulated 1044524 events
IOdriver Response time average:         10.937386

Note: this validates HP trace input, *not* the corresponding traced disk
HP srt trace input (avg. resp should be about 48.8ms)
disksim_run_simulation(): simulated 3422024 events
IOdriver Response time average:         48.786646

ASCII input (avg. resp should be about 13.8ms)
disksim_run_simulation(): simulated 10754770 events
IOdriver Response time average:         13.766948

syssim: externally-controlled DiskSim (avg. resp should be about 8.9ms)
response time: n=1000 average=8.894719 std. deviation=2.116511
IOdriver Response time average:         8.894719

[root at smile valid]# ./memsvalid

G1 MEMS Device - synthetic workload (avg. resp. should be about 2.00 ms)
disksim_run_simulation(): simulated 891324 events
IOdriver Response time average:         2.004587

G2 MEMS Device - synthetic workload (avg. resp. should be about 1.18 ms)
disksim_run_simulation(): simulated 800016 events
IOdriver Response time average:         1.178837

G3 MEMS Device - synthetic workload (avg. resp. should be about 0.87 ms)
*** assertion failed: in disksim_loadparams() (disksim_loadparams.c:86):
disksim->parfile != NULL: mems.g3.parv
./memsvalid: line 15: 11021 gave up                 ../src/disksim mems.g3.parv
mems.g3.nospring.outv ascii 0 1 mems0 "Spring constant factor" 0.00

G1 MEMS Device with 75% springs - synthetic workload (avg. resp. should be
about 2.01 ms)
disksim_run_simulation(): simulated 891263 events
IOdriver Response time average:         2.013940

G2 MEMS Device with 75% springs - synthetic workload (avg. resp. should be
about 1.16 ms)
disksim_run_simulation(): simulated 799997 events
IOdriver Response time average:         1.158043

G3 MEMS Device with 75% springs - synthetic workload (avg. resp. should be
about 0.85 ms)
*** assertion failed: in disksim_loadparams() (disksim_loadparams.c:86):
disksim->parfile != NULL: mems.g3.parv
./memsvalid: line 30: 11027 gave up         ../src/disksim mems.g3.parv
mems.g3.outv ascii 0 1 mems0 "Spring constant factor" 0.75

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