Probe Point Specifications
Currently IBM provides the following probe providers on AIX 6.1: syscall, uft, interval, trace, and the probevue probes (BEGIN and END). The syscall provider defines probe points for a subset of the available system calls. User Function Tracing (uft) probes can be defined for entry points of functions defined in a C or C++ program. Both syscall and uft probes must include a valid function prototype in the Vue script before function parameters (for the entry probes) or return values (for syscall exit probes only) can be accessed. The interval probes fire on a timer and can be defined on 100 millisecond intervals. The trace provider allows ProbeVue to access traditional trace hooks. Finally the probevue probes called BEGIN and END will fire as the probevue environment itself starts and exits.
Read more about this topic: Probe Vue
Famous quotes containing the words probe and/or point:
“Y’know scientists are funny. We probe and measure and dissect. Invent lights without heat, weigh a caterpillar’s eyebrow. But when it comes to really important things we’re as stupid as the caveman.... Like love. Makes the world go ‘round, but what do we know about it? Is it a fact? Is it chemistry? Electricity?”
—Martin Berkeley, and Jack Arnold. Helen Dobson (Lori Nelson)
“Ideals possess the strange quality that if they were completely realized they would turn into nonsense. One could easily follow a commandment such as “Thou shalt not kill” to the point of dying of starvation; and I might establish the formula that for the proper functioning of the mesh of our ideals, as in the case of a strainer, the holes are just as important as the mesh.”
—Robert Musil (1880–1942)