backbencher/chunk-65536.log at master · megacoder/backbencher · GitHub

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# Let write role testing create the file
rm -f /usr/tdrs/data/archdev/tf135c/datafile
/usr/bin/time -p ./backbencher -n4096000000 -c 65536 /usr/tdrs/data/archdev/tf135c/datafile
   Role: Writing
 Method: read(2) / write(2)
    End: 1168620724.838875
  Start: 1168620717.128540
Seconds: 7.710335
  Bytes: 4096000000.000000
   Rate: 5.31235e+08
 BlkSiz: 65536
ls -lh /usr/tdrs/data/archdev/tf135c/datafile
-rw-r-----  1 tf135c blaster 3.9G Jan 12 08:52 /usr/tdrs/data/archdev/tf135c/datafile
rm -f /usr/tdrs/data/archdev/tf135c/datafile
/usr/bin/time -p ./backbencher -m -n4096000000 -c 65536 /usr/tdrs/data/archdev/tf135c/datafile
   Role: Writing
 Method: mmap(2) / munmap(2)
    End: 1168620738.081360
  Start: 1168620724.900473
Seconds: 13.180887
  Bytes: 4096000000.000000
   Rate: 3.10753e+08
 BlkSiz: 65536
ls -lh /usr/tdrs/data/archdev/tf135c/datafile
-rw-r-----  1 tf135c blaster 3.9G Jan 12 08:52 /usr/tdrs/data/archdev/tf135c/datafile
# Do read role testing using leftover data file
/usr/bin/time -p ./backbencher -r -n4096000000 -c 65536 /usr/tdrs/data/archdev/tf135c/datafile
   Role: Reading
 Method: read(2) / write(2)
    End: 1168620758.506277
  Start: 1168620748.976065
Seconds: 9.530212
  Bytes: 4096000000.000000
   Rate: 4.29791e+08
 BlkSiz: 65536
/usr/bin/time -p ./backbencher -rm -n4096000000 -c 65536 /usr/tdrs/data/archdev/tf135c/datafile
   Role: Reading
 Method: mmap(2) / munmap(2)
    End: 1168620772.152654
  Start: 1168620758.509603
Seconds: 13.643051
  Bytes: 4096000000.000000
   Rate: 3.00226e+08
 BlkSiz: 65536