The Boot Prefetch Action
The Boot Prefetch action collates and summarizes events relevant to boot when using On/Off Trace Capture Tool.
xperf -i <trace file> ... [-o <output>] -a bootprefetch ...
| Option | Description |
|---|---|
| -summary |
Show the summary of boot prefetching |
| -events |
Dump ReadyBoot events with earliness information |
| -disktime |
Show the disk time breakdown during boot prefetching. |
If the -events option is used the -pattern option may be used
| Option | Description |
|---|---|
| -pattern |
Dump also overlapping events when dumping events |
If the -pattern option is used, -type name may be used.
| Option | Description |
|---|---|
| -type name |
Dump only specific type of events when dumping events in pattern view name is one of the five types: hit, prefetch, miss, pend, and write |
If the -events option is used the -range option may be used.
| Option | Description |
|---|---|
| -range t1 t2 |
Process ReadyBoot events completed between times T1 and T2. |
If no report type is selected, default is to show the summary.