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pmprintvalue(3) [centos man page]

PMPRINTVALUE(3) 					     Library Functions Manual						   PMPRINTVALUE(3)

NAME
pmPrintValue - print a performance metric value C SYNOPSIS
#include <stdio.h> #include <pcp/pmapi.h> void pmPrintValue(FILE *f, int valfmt, int type, const pmValue *val, int minwidth); cc ... -lpcp DESCRIPTION
The value of a single performance metric (as identified by val) is printed on the standard I/O stream identified by f. The value of the performance metric is interpreted according to the format of val as defined by valfmt (from a pmValueSet within a pmResult structure; see pmFetch(3)) and the generic description of the metrics type passed in via type. The value for type is typically extracted from a pmDesc structure, following a call to pmLookupDesc(3) for a particular performance metric. The output will be optionally padded to be at least minwidth characters wide. pmPrintValue is most useful for displaying values of performance metrics from pmFetch(3) (which returns a set of valfmt and val pairs for each requested metric), based upon the metrics type as returned from pmLookupDesc(3). SEE ALSO
PMAPI(3), pmAtomStr(3), pmConvScale(3), pmExtractValue(3), pmFetch(3), pmLookupDesc(3), pmTypeStr(3) and pmUnitsStr(3). Performance Co-Pilot PCP PMPRINTVALUE(3)

Check Out this Related Man Page

PMATOMSTR(3)						     Library Functions Manual						      PMATOMSTR(3)

NAME
pmAtomStr, pmAtomStr_r - convert a performance metric value into a string C SYNOPSIS
#include <pcp/pmapi.h> const char *pmAtomStr(const pmAtomValue *avp, int type); char *pmAtomStr_r(const pmAtomValue *avp, int type, char *buf, int buflen); cc ... -lpcp DESCRIPTION
All performance metric values may be encoded in a pmAtomValue union, defined as follows; typedef union { __int32_t l; /* 32-bit signed */ __uint32_t ul; /* 32-bit unsigned */ __int64_t ll; /* 64-bit signed */ __uint64_t ull; /* 64-bit unsigned */ float f; /* 32-bit floating point */ double d; /* 64-bit floating point */ char *cp; /* char ptr */ pmValueBlock *vbp; /* pmValueBlock ptr */ } pmAtomValue; Given the performance metric value pointed to by avp, and a performance metric type defined by type, pmAtomStr will generate the corre- sponding metric value as a string, suitable for diagnostic or report output. The pmAtomStr_r function does the same, but stores the result in a user-supplied buffer buf of length buflen, which should have room for at least 80 bytes. The value for type is typically extracted from a pmDesc structure, following a call to pmLookupDesc(3) for a particular performance metric. If the type is PM_TYPE_STRING values longer than 38 characters will be truncated after 34 characters, and truncation shown with ellipsis ``...'' at the end of the value. If the type is PM_TYPE_AGGREGATE then up to the first three 32-bit words are displayed as hexadecimal values. If the type is PM_TYPE_EVENT then a summary of the number of event records found in the value is generated. The return value from pmAtomStr is held in a single static buffer, so the returned value is only valid until the next call to pmAtomStr. NOTES
pmAtomStr returns a pointer to a static buffer and hence is not thread-safe. Multi-threaded applications should use pmAtomStr_r instead. SEE ALSO
PMAPI(3), pmConvScale(3), pmExtractValue(3), pmLookupDesc(3), pmPrintValue(3), pmTypeStr(3) and pmUnitsStr(3). Performance Co-Pilot PCP PMATOMSTR(3)
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