Commit d86b07cb authored by Matthieu Dorier's avatar Matthieu Dorier
Browse files

Update README.md

parent 35efb444
......@@ -64,7 +64,9 @@ Will output
/home/shane/software/darshan/testFile.00000003 1048576
```
You can obtain a header using the **-v** option:
#### Displaying a header
You can obtain a header using the **-v** (or **--verbose**) option:
```
> quarshan -o POSIX_BYTES_WRITTEN ior1.darshan -v
......@@ -75,6 +77,8 @@ You can obtain a header using the **-v** option:
/home/shane/software/darshan/testFile.00000003 1048576
```
#### Working with multiple counters
You can ask for multiple counters by separating them by commas (without spaces).
These counters must all be part of the same module (here POSIX, for example):
......@@ -87,7 +91,10 @@ These counters must all be part of the same module (here POSIX, for example):
/home/shane/software/darshan/testFile.00000003 1048576 4
```
You can provide reduction operations to directly compute statistics using **-r**:
#### Computing statistics automatically
You can provide reduction operations to directly compute statistics
using **-r** (or **--reductions**):
```
> quarshan -o POSIX_BYTES_WRITTEN,POSIX_SIZE_WRITE_100K_1M -r avg,min ior1.darshan -v
......@@ -104,8 +111,10 @@ operation, it will be applied to all requested counters. If you provide multiple
reduction operations, you must make sure to provide the same number as the number
of counters.
You can also **select** records that satisfy a particular condition using
*-s* or *--select*.
#### Conditionally selecting records
You can select only records that satisfy a particular condition using
*-s* (or *--select*).
For example to consider only records for which POSIX_F_META_TIME > 5.0e-5, use
and display the POSIX_BYTES_WRITTEN counter for them, use:
......
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