Adding upstream version 1.16.0.upstream/1.16.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 72 insertions, 0 deletions

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+# perf.plugin
+
+`perf.plugin` collects system-wide CPU performance statistics from Performance Monitoring Units (PMU) using
+the `perf_event_open()` system call.
+
+## Important Notes
+
+Accessing hardware PMUs requires root permissions, so the plugin is setuid to root.
+
+Keep in mind that the number of PMUs in a system is usually quite limited and every hardware monitoring
+event for every CPU core needs a separate file descriptor to be opened.
+
+## Charts
+
+The plugin provides statistics for general hardware and software performance monitoring events:
+
+Hardware events:
+1.  CPU cycles
+2.  Instructions
+3.  Branch instructions
+4.  Cache operations
+5.  BUS cycles
+6.  Stalled frontend and backend cycles
+
+Software events:
+1.  CPU migrations
+2.  Alignment faults
+3.  Emulation faults
+
+Hardware cache events:
+1.  L1D cache operations
+2.  L1D prefetch cache operations
+3.  L1I cache operations
+4.  LL cache operations
+5.  DTLB cache operations
+6.  ITLB cache operations
+7.  PBU cache operations
+
+## Configuration
+
+The plugin is disabled by default because the number of PMUs is usually quite limited and it is not desired to
+allow Netdata to struggle silently for PMUs, interfering with other performance monitoring software. If you need to
+enable the perf plugin, edit /etc/netdata/netdata.conf and set:
+
+```raw
+[plugins]
+    perf = yes
+```
+
+```raw
+[plugin:perf]
+    update every = 1
+    command options = all
+```
+
+You can use the `command options` parameter to pick what data should be collected and which charts should be
+displayed. If `all` is used, all general performance monitoring counters are probed and corresponding charts
+are enabled for the available counters. You can also define a particular set of enabled charts using the
+following keywords: `cycles`, `instructions`, `branch`, `cache`, `bus`, `stalled`, `migrations`, `alighnment`,
+`emulation`, `L1D`, `L1D-prefetch`, `L1I`, `LL`, `DTLB`, `ITLB`, `PBU`.
+
+## Debugging
+
+You can run the plugin by hand:
+
+```raw
+sudo /usr/libexec/netdata/plugins.d/perf.plugin 1 all debug
+```
+
+You will get verbose output on what the plugin does.
+
+[![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fcollectors%2Fperf.plugin%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)]()