Probes

The SDT probes defined by the Solaris kernel are listed in Table 22-1. The name stability and data stability of these probes are both Private because their description here thus reflects the kernel's implementation and should not be inferred to be an interface commitment. For more information about the DTrace stability mechanism, see Stability.

Table 22-1 SDT Probes

Probe name	Description	`arg0`
`callout-start`	Probe that fires immediately before executing a callout (see `<sys/callo.h>`). Callouts are executed by periodic system clock, and represent the implementation for `timeout`(9F).	Pointer to the `callout_t` (see `<sys/callo.h>`) corresponding to the callout to be executed.
`callout-end`	Probe that fires immediately after executing a callout (see `<sys/callo.h>`).	Pointer to the `callout_t` (see `<sys/callo.h>`) corresponding to the callout just executed.
`interrupt-start`	Probe that fires immediately before calling into a device's interrupt handler.	Pointer to the `dev_info` structure (see `<sys/ddi_impldefs.h>`) corresponding to the interrupting device.
`interrupt-complete`	Probe that fires immediately after returning from a device's interrupt handler.	Pointer to `dev_info` structure (see `<sys/ddi_impldefs.h>`) corresponding to the interrupting device.

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