mmv_lookup_value_desc - find a value in the Memory Mapped Value file

#include<pcp/pmapi.h>#include<pcp/mmv_stats.h>pmAtomValue*mmv_lookup_value_desc(void*addr,constchar*metric,constchar*inst);cc...-lpcp_mmv-lpcp

mmv_lookup_value_desc searches for the value of the instance identified by the external instance name in‐st of the metric metric in the MMV(5) file.  addr is the address returned from mmv_stats_init().

       The pointer returned points to a pmAtomValue union, which is 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;

       MMV string values should be set using either of the mmv_set_string or mmv_set_strlen routines.

mmv_lookup_value_desc - find a value in the Memory Mapped Value file

       The function returns the address inside of the memory mapped region on success or NULL on failure.

mmv_stats_init(3), mmv_inc_value(3) and mmv(5).

Performance Co-Pilot                                                                    MMV_LOOKUP_VALUE_DESC(3)