--- name: "pmSeriesSetup" section: "3" platform: "linux" package: "pcp" version: "7.2.2-2" release: "Arch Linux 2026-11-01" platforms: ["linux"] url: "https://new.carta.tech/pmSeriesSetup" --- # pmSeriesSetup(3) fast, scalable time series services ## NAME **pmSeriesSetup**, **pmSeriesSetSlots**, **pmSeriesSetEventLoop**, **pmSeriesSetConfiguration**, **pmSeriesSetMetricRegistry**, **pmSeriesClose** - fast, scalable time series services ## C SYNOPSIS **#include \** **int pmSeriesSetup(pmSeriesModule \****module***,** **pmSeriesCallBacks \****callbacks***,** **void \****arg***);** **int pmSeriesSetSlots(pmSeriesModule \****module***,** **void \****slots***);**\ **int pmSeriesSetEventLoop(pmSeriesModule \****module***,** **void \****uvloop***);**\ **int pmSeriesSetConfiguration(pmSeriesModule \****module***,** **struct dict \****config***);**\ **int pmSeriesSetMetricRegistry(pmSeriesModule \****module***,** **struct mmv\_registry \****registry***);** **int pmSeriesClose(pmSeriesModule \****module***);** **cc ... -lpcp\_web** ## DESCRIPTION The **pmSeriesSetup** and related API functions prepare an application for accessing the fast, scalable time series querying functionality of the Performance Co-Pilot (PCP). This functionality is provided through asynchronous APIs, which function in an event-driven fashion. The interfaces described here prepare a given time series *module* which associates callback routines with certain asynchronous events that occur as part of servicing time series requests. As a general pattern, all interfaces in these APIs that need to invoke *callbacks* provided by the calling program will take an opaque (void \* pointer) parameter, *arg*. This pointer will be passed through unchanged and is typically used to access a data structure maintaining state within the calling program. Where asynchronous setup is required by **pmSeriesSetup** its completion will be indicated through use of the *on\_setup* callback, which is part of the passed in **pmSeriesModule** structure. This structure also provides for custom diagnostics handling, through the *on\_info* callback. These are self-explanatory, see *\* for exact calling conventions. The *callbacks* registered by **pmSeriesSetup** to handle events are as follows: - **pmSeriesMatchCallBack** *on\_match* When a time series query discovers time series identifiers that match the query, the *on\_match* callback will be called once for every series identifier (SID). The SID is a unique 40-byte ASCII representation of a SHA hash. - **pmSeriesDescCallBack** *on\_desc* Metric descriptor requests from **pmSeriesDescs**(1) will invoke this callback once for each series identifier. - **pmSeriesInstCallBack** *on\_inst* Instance identification callback - internal (numeric) and external (string) instance identifiers, as well as time series and source (host) SHA1 identifiers. Called once for each instance. The associated series identifier is also provided to the callback. - **pmSeriesLabelCallBack** *on\_labelmap* Provides metric labels (name and value mappings) for each series identifier passed to **pmSeriesLabels**(1). - **pmSeriesStringCallBack** *on\_instance* Provides an instance name for a call to **pmSeriesInstances**(1)**-** the callback is called once for each instance name. The associated series identifier is also provided to the callback. - **pmSeriesStringCallBack** *on\_context* Provides a context name for a call to **pmSeriesSources**(1)**-** the callback is called once for each source (hostname or archive). The associated source identifier is also provided to the callback. - **pmSeriesStringCallBack** *on\_metric* Provides a metric name for a call to **pmSeriesMetrics**(1)**-** the callback is called once for each metric name. The associated series identifier is also provided to the callback. - **pmSeriesStringCallBack** *on\_label* Provides a label name for a call to **pmSeriesLabels**(1)**-** the callback is called once for each label name. The associated series identifier is also provided to the callback. - **pmSeriesValueCallBack** *on\_value* Calls to the **pmSeriesQuery** interface that provide a time window may result in values being found for matching time series. The *on\_value* callback will be invoked once for each time series value, also providing the sample timestamp (in both string and binary form, as a time in nanoseconds since the epoch). The associated series identifier is also provided to the callback. - **pmSeriesDoneCallBack** *on\_done* On completion of all asynchronous interfaces that return success (zero return code), this callback will be called. It provides a status code indicating overall success (zero) or failure (negative PMAPI code) of the operation. The helper functions **pmSeriesSetSlots** (key-value server), **pmSeriesSetEventLoop** (libuv), **pmSeriesSetConfiguration** (configuration file) and **pmSeriesSetMetricRegistry** (MMV instrumentation) interfaces provide a mechanism for passing in state for each of the associated subsystems. Finally, a call to **pmSeriesClose** is used to end services available from a series *module* previously established through **pmSeriesSetup**. Within PCP, the [**pmproxy**(1)](/pmproxy/1.md) and [**pmseries**(1)](/pmseries/1.md) utilities are the primary users of these interfaces, providing REST API and command line time series query services respectively. ## DIAGNOSTICS Where these functions return a status code, this is always zero on success. On failure a negative PMAPI error code is returned. ## SEE ALSO [**pmproxy**(1)](/pmproxy/1.md), [**pmlogger**(1)](/pmlogger/1.md), [**pmseries**(1)](/pmseries/1.md), [**mmv\_stats\_registry**(3)](/mmv_stats_registry/3.md), [**pmSeriesDescs**(3)](/pmSeriesDescs/3.md), [**pmSeriesQuery**(3)](/pmSeriesQuery/3.md), [**PMAPI**(3)](/PMAPI/3.md) and [**PMWEBAPI**(3)](/PMWEBAPI/3.md).