Prometheus cumulative metrics transform to n9e metric type litianshuncommittedJun 22, 2020 bfe5a2a prom counter type default Subtract litianshuncommittedJun 22, 2020 d2ad05f Commits on Jun 20, 2020 add some doc: stdin args description UlricQincommittedJun 20, 2020 ...
In your eBPF program you can usePT_REGS_IP(ctx)to get the address of the kprobe you attached to as au64variable. Note that sometimes you can observePT_REGS_IPbeing off by one. You can subtract 1 in your code to make it point to the right instruction that can be found/proc/kallsyms...
// Sub subtracts the given value from the Gauge. (The value can be // negative, resulting in an increase of the Gauge.) Sub(float64) // SetToCurrentTime sets the Gauge to the current Unix time in seconds. SetToCurrentTime()
Resulting metrics: # HELP ebpf_exporter_page_cache_ops_total Page cache operation counters by type # TYPE ebpf_exporter_page_cache_ops_total counter ebpf_exporter_page_cache_ops_total{command="syslog-ng",op="account_page_dirtied"} 1531 ebpf_exporter_page_cache_ops_total{command="syslog-ng"...