The environment variables determine the directory in which to store dynamic information files or whether to overwrite pgopti.dpi. The PGO environment variables are described in the table below.
Variable |
Description |
PROF_DIR |
Specifies the directory in which dynamic information files are created. This variable applies to all three phases of the profiling process. |
PROF_DUMP_INTERVAL |
Initiates interval profile dumping in an instrumented user application. |
PROF_NO_CLOBBER |
Alters the feedback compilation phase slightly. By default, during the feedback compilation phase, the compiler merges the data from all dynamic information files and creates a new pgopti.dpi file, even if one already exists. When this variable is set, the compiler does not overwrite the existing pgopti.dpi file. Instead, the compiler issues a warning and you must remove the pgopti.dpi file if you want to use additional dynamic information files. |
See also the documentation for your operating system for instructions on how to specify environment variables and their values.