TPFMT(1) BSD General Commands Manual TPFMT(1)NAME
tpfmt -- format tprof samples
tpfmt [-CkLPs] [-p pid]
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.
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
PROFIL(2) BSD System Calls Manual PROFIL(2)NAME
profil -- control process profiling
Standard C Library (libc, -lc)
profil(char *samples, size_t size, u_long offset, u_int scale);
The profil() function enables or disables program counter profiling of the current process. If profiling is enabled, then at every clock
tick, the kernel updates an appropriate count in the samples buffer.
The buffer samples contains size bytes and is divided into a series of 16-bit bins. Each bin counts the number of times the program counter
was in a particular address range in the process when a clock tick occurred while profiling was enabled. For a given program counter
address, the number of the corresponding bin is given by the relation:
[(pc - offset) / 2] * scale / 65536
The offset parameter is the lowest address at which the kernel takes program counter samples. The scale parameter ranges from 1 to 65536 and
can be used to change the span of the bins. A scale of 65536 maps each bin to 2 bytes of address range; a scale of 32768 gives 4 bytes,
16384 gives 8 bytes and so on. Intermediate values provide approximate intermediate ranges. A scale value of 0 disables profiling.
If the scale value is nonzero and the buffer samples contains an illegal address, profil() returns -1, profiling is terminated and errno is
set appropriately. Otherwise profil() returns 0.
/usr/lib/gcrt0.o profiling C run-time startup file
gmon.out conventional name for profiling output file. This may be different if the PROFDIR environment variable is set.
The following error may be reported:
[EFAULT] The buffer samples contains an invalid address.
SEE ALSO gprof(1), moncontrol(3)BUGS
This routine should be named profile().
The samples argument should really be a vector of type unsigned short.
The format of the gmon.out file is undocumented.
BSD June 4, 1993 BSD
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