PMLOGWRITEMARK(3)          Library Functions Manual          PMLOGWRITEMARK(3)

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 indicates a discontinuity in the time
       series of logged data in the archive, see PCPIntro(1) for more
       information.

       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 error message by calling pmErrStr(3).

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

Performance Co-Pilot                  PCP                    PMLOGWRITEMARK(3)