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NAME | C++ SYNOPSIS | DESCRIPTION | DESTRUCTOR | CONSTRUCTORS | DIAGNOSTICS | SEE ALSO | COLOPHON |
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QMCSOURCE(3) Library Functions Manual QMCSOURCE(3)
QmcSource - manages contexts created by all groups
#include <QmcSource.h>
c++ ... -lpcp_qmc -lpcp
The QmcSource class maintains a unique list of all metric sources
in use to minimize the creation of new contexts (see
pmNewContext(3)) when the context could have been duplicated (see
pmDupContext(3)). This also reduces the duplication of
descriptions of each source.
In general, QMC users should only need to access QmcSource
methods to obtain source descriptions for a QmcContext(3) object.
All context creation by the user should be handled through
QmcGroup(3).
~QmcSource();
Destructor.
static QmcSource* getSource(int type, const char* source,
bool matchHosts)
This method will return a QmcSource object that represents a
context of type to source. The QmcSource object may be a new
object if the source has not been previously requested.
Memory management of the QmcSource objects is handled by
QmcSource. If all QmcContext(3)s to the QmcSource have been
deleted, the QmcSource object will also be deleted.
The matchHosts flag controls the algorithm that is used to
match hosts to archives. If matchHosts is equal to false
then no attempt will be made by this method to match a host
context to an existing source context. A QmcSource object
will always be returned in this case, although the
QmcSource::status method may indicate that a context to
source failed.
If matchHosts is equal to true, host contexts will be matched
to a predefined archive source collected from that source.
If no archive sources for the source have been previous
specified, getSource will return a NULL pointer.
Error messages are generated using pmprintf(3) but are not
flushed. It is the responsibility of the user to call pmflush(3)
to output any messages.
Additional diagnostics may be activated by adding the option pmc
to the global debugging specification, as described in
pmSetDebug(3).
PMAPI(3), QMC(3), QmcContext(3), QmcGroup(3), pmDupContext(3),
pmflush(3), pmNewContext(3) and pmprintf(3).
This page is part of the PCP (Performance Co-Pilot) project.
Information about the project can be found at
⟨http://www.pcp.io/⟩. If you have a bug report for this manual
page, send it to pcp@groups.io. This page was obtained from the
project's upstream Git repository
⟨https://github.com/performancecopilot/pcp.git⟩ on 2024-06-14.
(At that time, the date of the most recent commit that was found
in the repository was 2024-06-14.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
Performance Co-Pilot SGI QMCSOURCE(3)
Pages that refer to this page: QMC(3)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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