Solaris Performance and Tools: Dtrace and Mdb Techniques for - download pdf or read online

By Richard McDougall

ISBN-10: 0131568191

ISBN-13: 9780131568198

In overall, the 2 books Solaris functionality and instruments & Solaris Internals reviewed the following current a brand new point of data concerning the internals of Solaris, what they do, how they behave, and the way to research that habit. The books are a needs to for builders, approach programmers, and platforms directors who paintings with Solaris eight, nine, or 10. they're specifically valuable for clients of Solaris 10 and OpenSolaris as a result of their exploration of the recent instruments in these releases. those books obtain my optimum advice.

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Download PDF by Richard McDougall: Solaris Performance and Tools: Dtrace and Mdb Techniques for

In overall, the 2 books Solaris functionality and instruments & Solaris Internals reviewed right here current a brand new point of information concerning the internals of Solaris, what they do, how they behave, and the way to investigate that habit. The books are a needs to for builders, approach programmers, and platforms directors who paintings with Solaris eight, nine, or 10.

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This statistic has now been deliberately set to zero in Solaris 10. [3] Historically, this metric was useful on uniprocessor systems as a way of indicating how much time was spent waiting for I/O. In a multiprocessor system it's not possible to make this simple approximation, which led to a significant amount of confusion Part One: Observability Methods 39 40 Part One: Observability Methods (basically, if %wio was non-zero, then the only useful information that could be gleaned is that at least one thread somewhere was waiting for I/O.

Ithr (interrupts as threads). The number of interrupts that are converted to real threads, typically as a result of inbound network packets, blocking for a mutex, or a synchronization event. (High-priority interrupts won't do this, and interrupts without mutex contention typically interrupt the running thread and complete without converting to a full thread). 11 in Solaris™ Internals for further information. The locking-related statistics reported by mpstat are as follows. • smtx (kernel mutexes).

While DTrace can sample activity, it may be is better suited to trace Part One: Observability Methods 51 52 Part One: Observability Methods activity, measuring nanosecond timestamps for each event. The sched provider exists to facilitate the tracing of scheduling events. With sched, runq-sz and %runocc can be measured with a much higher accuracy. 15. DTrace Probes for CPU States The sched provider makes available probes related to CPU scheduling. Because CPUs are the one resource that all threads must consume, the sched provider is very useful for understanding systemic behavior.

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Solaris Performance and Tools: Dtrace and Mdb Techniques for Solaris 10 and Opensolaris by Richard McDougall


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