| Summary: | Modern kernels no longer use cputime for task->utime and task->stime | ||
|---|---|---|---|
| Product: | systemtap | Reporter: | agentzh <agentzh> |
| Component: | tapsets | Assignee: | Unassigned <systemtap> |
| Status: | UNCONFIRMED --- | ||
| Severity: | normal | ||
| Priority: | P2 | ||
| Version: | unspecified | ||
| Target Milestone: | --- | ||
| Host: | Target: | ||
| Build: | Last reconfirmed: | ||
Not sure how to add a stap feature test for this kernel change. |
The task_time_string() tapset function assumes task->{utime,stime} to be cputime (or jiffies), which leads to very wrong results being returned. Modern kernels already use nanoseconds for these two fields.