TPFMT(1) BSD General Commands Manual TPFMT(1)NAME
tpfmt -- format tprof samples
SYNOPSIS
tpfmt [-CkLPs] [-p pid]
DESCRIPTION
The tpfmt utility creates and outputs a plain text representation for a given profiling result recorded by tprof(8).
The tpfmt utility accepts the following options.
-C Don't distinguish CPUs. All samples are treated as its CPU number is 0.
-k Kernel only. Ignore samples for userland code.
-L Don't distinguish LWPs. All samples are treated as its LWP ID is 0.
-P Don't distinguish processes. All samples are treated as its PID is 0.
-p pid Process only samples for the process with PID pid and ignore the rest.
-s Per symbol. Try to aggregate samples by functions rather than instructions. It's currently useful only for in-kernel samples.
EXAMPLES
See tprof(8) for an example.
SEE ALSO tprof(4), tprof(8)AUTHORS
The tpfmt utility is written by YAMAMOTO Takashi.
BSD November 27, 2011 BSD
Check Out this Related Man Page
TPROF(8) BSD System Manager's Manual TPROF(8)NAME
tprof -- record tprof profiling samples
SYNOPSIS
tprof [-c] [-o file] command ...
DESCRIPTION
The tprof is a sampling based profiler.
tprof utility makes the kernel driver start profiling, executes the specified command, keeps recording samples from the kernel driver until
the command finishes, and reports statistics to the standard error.
The tprof pseudo driver and a suitable backend should be loaded beforehand.
The tprof utility accepts the following options.
-o file Write the collected samples to the file named file. The default is ``tprof.out''.
-c Write the collected samples to the standard output. Note that the output is a binary stream.
EXAMPLES
The following command profiles the system during 1 second and shows the top-10 kernel functions which likely consumed CPU cycles.
tprof -c sleep 1 2>/dev/null | tpfmt -skCLP | head -10
DIAGNOSTICS
The tprof utility reports the following statistics about the activities of the tprof pseudo driver.
sample The number of samples collected and prepared for userland consumption.
overflow The number of samples dropped because the per-CPU buffer was full.
buf The number of buffers successfully prepared for userland consumption.
emptybuf The number of buffers which have been dropped because they were empty.
dropbuf The number of buffers dropped because the number of buffers kept in the kernel exceeds the limit.
dropbuf_samples The number of samples dropped because the buffers containing the samples were dropped.
SEE ALSO tpfmt(1), tprof(4)AUTHORS
The tprof utility is written by YAMAMOTO Takashi.
CAVEATS
The contents and representation of recorded samples are undocumented and will likely be changed for future releases of NetBSD in an incompat-
ible way.
BSD November 26, 2011 BSD
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