01-08-2008
Can you transform your posted code to a complete program that demonstrates just the issue while being short, so that others can copy onto their systems to run and trace. Without seeing the content of the variables, it is impossible for anyone to help you debug.
And you have not even mentioned in what way the else part is not working. It's not running as expected? It is being executed in a wrong way? So, be specific with what you are expecting.
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LEARN ABOUT CENTOS
pmtrace
PMTRACE(1) General Commands Manual PMTRACE(1)
NAME
pmtrace - command line performance instrumentation
SYNOPSIS
pmtrace [-q] [-c value | -e command | -v value] [-h host] [-S state] tag
DESCRIPTION
pmtrace provides a simple command line interface to the trace Performance Metrics Domain Agent (PMDA) and the associated pcp_trace library.
The default pmtrace behavior is to provide point trace data to the trace PMDA, using the tag argument as the identifying name associated
with each trace point. The tag then becomes an instance identifier within the set of trace.point metrics.
The -e option allows an arbitrary command to be executed. This command will be measured as a transaction since it has well defined start
and end points. The information is made available through the trace.transact metrics.
Trace data can be sent to the trace PMDA running on host, rather than the localhost, using the -h option. This overrides use of the envi-
ronment variable PCP_TRACE_HOST.
The -q option suppresses messages from a successful trace, so that pmtrace runs quietly.
The -c option allows an arbitrary counter value to be exported through the trace.count metrics, while the -v option allows an arbitrary
floating point value to be exported through the trace.observe metrics
The -S option enables internal debugging and tracing. The value of state is a bit-wise combination of debug flags as defined in pmtraces-
tate(3), and may be specified using the decimal or hexadecimal syntax prescribed by strtol(3).
ENVIRONMENT
Since pmtrace uses the libpcp_trace library routines, the environment variables PCP_TRACE_HOST, PCP_TRACE_PORT, and PCP_TRACE_TIMEOUT are
all honored. Refer to pmdatrace(3) for a detailed description of the semantics of each.
FILES
$PCP_DEMOS_DIR/trace/pmtrace.c
source code for pmtrace
PCP ENVIRONMENT
Environment variables with the prefix PCP_ are used to parameterize the file and directory names used by PCP. On each installation, the
file /etc/pcp.conf contains the local values for these variables. The $PCP_CONF variable may be used to specify an alternative configura-
tion file, as described in pcp.conf(5).
SEE ALSO
pmcd(1), pmdatrace(1), pmprobe(1), PMAPI(3), and pmdatrace(3).
DIAGNOSTICS
All are generated on standard error and are intended to be self-explanatory.
The pmtrace exit status is always zero except when the -e option is in use, in which case the exit status of command is returned.
Performance Co-Pilot PCP PMTRACE(1)