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Update collectors' README

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Thomas Roehl 2021-03-29 15:23:55 +02:00
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collectors/README.md
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@ -73,14 +73,15 @@ The collector will measure both groups `MEM_DP` and `FLOPS_DP` for `duration` se
# Contributing own collectors
A collector reads data from any source, parses it to metrics and submits these metrics to the `metric-collector`. A collector provides three function:
* `Init() error`: Initializes the collector and its data structures.
* `Read(duration time.Duration) error`: Read, parse and submit data. If the collector has to measure anything for some duration, use the provided function argument `duration`
* `Close()`: Closes down the collector.
It is recommanded to call `setup()` in the `Init()` function as it creates the required data structures.
Submitting data:
Each collector contains data structures for the submission of metrics:
Each collector contains data structures for the submission of metrics after calling `setup()` in `Init()`:
* `node` (`map[string]string`): Just key-value store for all metrics concerning the whole system
* `sockets` (`map[int]map[string]string`): One key-value store per CPU socket like `sockets[1]["testmetric] = 1.0` for the second socket. You can either use `len(sockets)` to get the amount of sockets or you use `SocketList()`.
* `cpus` (`map[int]map[string]string`): One key-value store per hardware thread like `cpus[12]["testmetric] = 1.0`. You can either use `len(cpus)` to get the amount of hardware threads or you use `CpuList()`.