Solaris Application Programming, 1/e - Chapter 4 - Parent Directory

78 Chapter 4 Informational Tools
It is possible to make trapstat run on a single process. The command line for
this is shown in Example 4.37.
Example 4.37 Command Line to Run trapstat on a Single Program
# trapstat
At the end of the run of the process, this will report the number of traps that the
single process caused. The figures will be reported (by default) as the number of
traps per second.
4.4.7 Reporting Virtual Memory Mapping Information for a
Process (pmap)
The pmap utility returns information about the address space of a given process.
Possibly the most useful information the utility returns is information about the
page size mapping returned under the -s option.
Example 4.38 shows a sample of output from the pmap utility under the -s
option. The output is useful in that it shows where the code and data are located in
memory, as well as where the libraries are located in memory. For each memory
range, a page size is listed in the Pgsz column. In this case, all the memory has
been allocated on 8KB pages (I discussed page sizes in Section 1.9.2 of Chapter 1).
Output from pmap is the best way to determine whether an application has successfully
obtained large pages.
Example 4.38 pmap -s Output
% pmap -s 7962
7962: ./myapp params
Address Kbytes Pgsz Mode Mapped File
00010000 272K 8K r-x-- /export/home/myapp
00054000 80K - r-x-- /export/home/myapp
00068000 32K 8K r-x-- /export/home/myapp
0007E000 48K 8K rwx-- /export/home/myapp
...
000D2000 2952K 8K rwx-- [ heap ]
...
004D4000 1984K 8K rwx-- [ heap ]
006C4000 8K - rwx-- [ heap ]
006C6000 50944K 8K rwx-- [ heap ]
...
FF210000 8K 8K r-x-- /usr/platform/sun4u-us3/lib/libc_psr.so.1
FF220000 32K 8K r-x-- /opt/SUNWspro/prod/usr/lib/libCrun.so.1
...