[Disksim-users] why is the number of handled request to be short always 1 less than issued request?

[xm yang]

hi,
when the valaue of Probability of time-critical request is set to 1.0,  disksim report that the number of handled request is same to the configured value of the parametre, Number of I/O requests to generate, in parv file. however, when changed it's value to 0.0, disksim always report that the number of handled request is to be short 1 less than  issued  request. why? 

following are disksim reported:

OVERALL I/O SYSTEM STATISTICS
-----------------------------

Overall I/O System Total Requests handled:    49151
......
Overall I/O System Non-Critical Writes:      49151      0.999980
Overall I/O System Number of reads:         0      0.000000
Overall I/O System Number of writes:    49152      1.000000
Overall I/O System Sequential reads:        0      0.000000      0.000000
Overall I/O System Sequential writes:   24679      0.502096      0.502096
......
SYSTEM-LEVEL LOGORG STATISTICS
------------------------------

System Logical Organization #0
System logorg #0 Number of requests:       49152
System logorg #0 Number of read requests:  0      0.000000
System logorg #0 Number of accesses:       49152
System logorg #0 Number of read accesses:  0      0.000000
......
System logorg #0 disk Number of buffer accesses:    49151
......
IODRIVER STATISTICS
-------------------

IOdriver Total Requests handled:    49151
......
IOdriver Number of writes:    49152      1.000000
......
DISK STATISTICS
......
Disk Number of buffer accesses:    49151
......


       
---------------------------------
 雅虎邮箱，您的终生邮箱！
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.andrew.cmu.edu/pipermail/disksim-users/attachments/20080617/9c54cf05/attachment.html>