`metricCollector.go`

The base class/configuration is located in metricCollector.go.

Collectors

memstatMetric.go: Reads /proc/meminfo to calculate the node metric mem_used
loadavgMetric.go: Reads /proc/loadavg and submits the node metrics:
- load_one
- load_five
- load_fifteen
netstatMetric.go: Reads /proc/net/dev and submits for all network devices (except loopback lo) the node metrics:
- <dev>_bytes_in
- <dev>_bytes_out
- <dev>_pkts_in
- <dev>_pkts_out
lustreMetric.go: Reads Lustre's stats file /proc/fs/lustre/llite/lnec-XXXXXX/stats and submits the node metrics:
- read_bytes
- read_requests
- write_bytes
- write_bytes
- open
- close
- getattr
- setattr
- statfs
- inode_permission
infinibandMetric.go: Reads InfiniBand LID from /sys/class/infiniband/mlx4_0/ports/1/lid and uses the perfquery command to read the node metrics:
- ib_recv
- ib_xmit
likwidMetric.go: Reads hardware performance events using LIKWID. It submits socket and cpu metrics:
- mem_bw (socket)
- power (socket, Sum of RAPL domains PKG and DRAM)
- flops_dp (cpu)
- flops_sp (cpu)
- flops_any (cpu, 2*flops_dp + flops_sp)
- cpi (cpu)
- clock (cpu)

Only the likwidMetric.go requires preparation steps. For this, the Makefile can be used. The LIKWID build needs to be configured:

Version of LIKWID in LIKWID_VERSION
Target user for LIKWID's accessdaemon in DAEMON_USER. The user has to have enough permissions to read the msr and pci device files
Target group for LIKWID's accessdaemon in DAEMON_GROUP

It performs the following steps:

Download LIKWID tarball
Unpacking
Adjusting configuration for LIKWID build
Build it
Copy all required files into collectors/likwid
The accessdaemon is installed with the suid bit set using sudo also into collectors/likwid