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44 of overall statistics about each of the individual handling of IOs, and
108 \item[average component times across all IOs] The time line of each IO
155 in the system. This provides some idea as to how quickly IOs are
159 of IOs during the run\footnote{One of the areas that needs some
161 IOs during a run. In theory, one would like ${Q2I} + {I2D} + {D2C}
185 \emph{Q2A} and \emph{Q2C} times for those IOs.
215 requests into fewer, but larger, IOs to the underlying driver. In this
218 for the minimum, average and maximum IOs generated.
236 -- issued} IOs. The next two sections provides some rudimentary
238 between IOs. Values provided include the number of seeks (number of IOs
240 IOs, the \emph{median} value for all seeks, and the \emph{mode} -
258 number of seeks is indicative as to how many IOs are coming out of
288 \item[IOs per Unplug \& Unplugs-due-to-timeout]
290 In this subsection one can see the average number of IOs on the request
305 DEV | IOs/Unp IOs/Unp(to)
310 DEV | IOs/Unp IOs/Unp(to)
362 doing buffered IO, then the actual submitted IOs will most likely
383 will also break down the various parts of an IOs time line based upon a
472 histogram output for the amount of IOs released at unplug time.
538 of IOs and when they are completed. Figure~\ref{fig:activity} shows
565 column (Y values) represents the number of IOs of that size.
636 and will produce a file containing streams of IOs (separated by blank
637 spaces). As an example, here is a snippet of 4 IOs that were merged
638 together, you will note there are 3 merged IOs, and 1 inserted in the
694 \item Combined data -- all read and write IOs
711 \item[r] For read (device to system) IOs
712 \item[w] For write (system to device) IOs
713 \item[c] Combined -- both read and write IOs
1002 number of IOs released. There are 21 output values into the file, as