Enum perfcnt::linux::SoftwareEventType [−] [src]

pub enum SoftwareEventType {
    CpuClock,
    TaskClock,
    PageFaults,
    ContextSwitches,
    CpuMigrations,
    PageFaultsMin,
    PageFaultsMaj,
    AlignmentFaults,
    EmulationFaults,
}

Variants

[−]

This reports the CPU clock, a high-resolution per-CPU timer.

[−]

This reports a clock count specific to the task that is running.

[−]

This reports the number of page faults.

[−]

This counts context switches.

Until Linux 2.6.34, these were all reported as user-space events, after that they are reported as happening in the kernel.

[−]

This reports the number of times the process has migrated to a new CPU.

[−]

This counts the number of minor page faults. These did not require disk I/O to handle.

[−]

This counts the number of major page faults. These required disk I/O to handle.

[−]

This counts the number of alignment faults.

These happen when unaligned memory accesses happen; the kernel can handle these but it reduces performance. This happens only on some architectures (never on x86).

(Since Linux 2.6.33)

[−]

This counts the number of emulation faults. The kernel sometimes traps on unimplemented instructions and emulates them for user space. This can negatively impact performance.

(Since Linux 2.6.33)