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[Discuss-gnuradio] USRP Benchmark fails with 32MB/sec


From: Tomek
Subject: [Discuss-gnuradio] USRP Benchmark fails with 32MB/sec
Date: Sat, 3 Nov 2007 13:23:10 +0100

Hey!

I installed the software and all tests ran OK. I have an USRP and I ran the
benchmark "test_usrp_benchmark.py" and almost every time I start the script
I get another result. Sometimes 4MB sometimes 16MB but never 32MB. 

I´m using an DELL Inspiron 8100 with 512 RAM, 866MHZ Mobile PIII and USB 2.0
PCMCIA could this be the problem?

Testing 2MB/sec... usb_throughput = 2M
ntotal    = 1000000
nright    = 0
runlength = 0
delta     = 1000000
FAILED
Testing 4MB/sec... usb_throughput = 4M
ntotal    = 2000000
nright    = 1999326
runlength = 1999326
delta     = 674
OK
Testing 8MB/sec... usb_throughput = 8M
ntotal    = 4000000
nright    = 3998982
runlength = 3998982
delta     = 1018
OK
Testing 16MB/sec... usb_throughput = 16M
ntotal    = 8000000
nright    = 7535300
runlength = 7535300
delta     = 464700
FAILED
Testing 32MB/sec... usb_throughput = 32M
ntotal    = 16000000
nright    = 254869
runlength = 0
delta     = 16000000
FAILED
Max USB/USRP throughput = 8MB/sec

============================================================

Testing 2MB/sec... usb_throughput = 2M
ntotal    = 1000000
nright    = 997875
runlength = 997875
delta     = 2125
OK
Testing 4MB/sec... usb_throughput = 4M
ntotal    = 2000000
nright    = 1999697
runlength = 1999697
delta     = 303
OK
Testing 8MB/sec... usb_throughput = 8M
ntotal    = 4000000
nright    = 3989160
runlength = 3948456
delta     = 51544
OK
Testing 16MB/sec... usb_throughput = 16M
ntotal    = 8000000
nright    = 7998554
runlength = 7998554
delta     = 1446
OK
Testing 32MB/sec... usb_throughput = 32M
ntotal    = 16000000
nright    = 267176
runlength = 0
delta     = 16000000
FAILED
Max USB/USRP throughput = 16MB/sec


============================================================

Testing 2MB/sec... usb_throughput = 2M
ntotal    = 1000000
nright    = 999930
runlength = 999930
delta     = 70
OK
Testing 4MB/sec... usb_throughput = 4M
ntotal    = 2000000
nright    = 1997399
runlength = 1997399
delta     = 2601
OK
Testing 8MB/sec... usb_throughput = 8M
ntotal    = 4000000
nright    = 3959270
runlength = 3918566
delta     = 81434
FAILED
Testing 16MB/sec... usb_throughput = 16M
ntotal    = 8000000
nright    = 7898637
runlength = 7859980
delta     = 140020
FAILED
Testing 32MB/sec... usb_throughput = 32M
ntotal    = 16000000
nright    = 241073
runlength = 0
delta     = 16000000
FAILED
Max USB/USRP throughput = 4MB/sec





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