denki: derived metrics assigning power draw to individual processes

src/derived/denki.conf

@@ -0,0 +1,30 @@
+#
+# Copyright (c) 2023, Red Hat.
+#
+# This file is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation; either version 2 of the License, or (at your
+# option) any later version.
+#
+# This file is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# for more details.
+#
+#
+# Denki (power) derived metrics
+# These derived metrics use RAPL hardware metrics to assign power usage
+# to processes based on the processor and memory power draw metrics.
+#
+proc.denki.cpu = scalar((rate(denki.rapl.raw))[core]) * (rate(proc.psinfo.utime) + rate(proc.psinfo.stime)) / (kernel.all.uptime - proc.psinfo.start_time)
+proc.denki.cpu(oneline) = Power used for processors by individual processes
+proc.denki.cpu(helptext) = '\
+Power used (in watts) by processors, broken down by individual
+processes based on RAPL hardware metrics from x86_64 machines.'
+
+proc.denki.mem = scalar((rate(denki.rapl.raw))[dram]) * (proc.memory.vmrss / (mem.util.other - mem.util.shmem - mem.util.slab - mem.util.vmallocUsed - mem.util.hugepagesTotalBytes))
+proc.denki.mem(oneline) = Power used for memory by individual processes
+proc.denki.mem(helptext) = '\
+Power used (in watts) by memory for individual processes.  This
+calculation is based on using RAPL hardware metrics from x86_64
+machines and resident set size (RSS) for each running process.'