NAME

       __pmLogWriteMark - append a <mark> record to a PCP archive

C SYNOPSIS

       #include <pcp/pmapi.h>
       #include <pcp/libpcp.h>

       int __pmLogWriteMark(__pmArchCtl *acp, const __pmTimestamp *last_stamp, const __pmTimestamp *inc);

       cc ... -lpcp

CAVEAT

       This documentation is intended for internal Performance Co-Pilot (PCP) developer use.

       These interfaces are not part of the PCP APIs that are guaranteed to remain fixed across releases, and at
       some point in the future they may not work or may provide different semantics.

DESCRIPTION

       __pmLogWriteMark  appends a <mark> record to the current data file of a PCP archive.  A <mark> record in‐
       dicates a discontinuity in the time series of logged data in the archive, see PCPIntro(1) for more infor‐
       mation.

       The timestamp of the <mark> record is given by last_stamp optionally incremented by  inc  unless  inc  is
       NULL (in which case no increment is done).

       The current data volume's I/O stream and the archive version (determines the format of the <mark> record)
       are determined from acp.

DIAGNOSTICS AND RETURN VALUES

       The  return value is 0 if all is well, else some error code less than zero that can be turned into an er‐
       ror message by calling pmErrStr(3).

SEE ALSO

       PCPIntro(1), PMAPI(3) and __pmLogWrite(3).

Performance Co-Pilot                                   PCP                                     PMLOGWRITEMARK(3)