diff options
author | Kevin Lyda <kevin@ie.suberic.net> | 2017-02-12 14:38:12 +0000 |
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committer | Niall Sheridan <nsheridan@gmail.com> | 2017-02-12 14:38:12 +0000 |
commit | ed8bc523fd0d1a66acf3fa449c453508035efdfc (patch) | |
tree | c05849546e1dd9d771dcc4c4ff52056d249a95fb /vendor/github.com/prometheus/procfs/proc_io.go | |
parent | 9c344a0a95c44ef9cebade7b8a65ac160d9eb900 (diff) |
Initial pass at prometheus support. (#56)
Diffstat (limited to 'vendor/github.com/prometheus/procfs/proc_io.go')
-rw-r--r-- | vendor/github.com/prometheus/procfs/proc_io.go | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/vendor/github.com/prometheus/procfs/proc_io.go b/vendor/github.com/prometheus/procfs/proc_io.go new file mode 100644 index 0000000..b4e31d7 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/proc_io.go @@ -0,0 +1,55 @@ +package procfs + +import ( + "fmt" + "io/ioutil" + "os" +) + +// ProcIO models the content of /proc/<pid>/io. +type ProcIO struct { + // Chars read. + RChar uint64 + // Chars written. + WChar uint64 + // Read syscalls. + SyscR uint64 + // Write syscalls. + SyscW uint64 + // Bytes read. + ReadBytes uint64 + // Bytes written. + WriteBytes uint64 + // Bytes written, but taking into account truncation. See + // Documentation/filesystems/proc.txt in the kernel sources for + // detailed explanation. + CancelledWriteBytes int64 +} + +// NewIO creates a new ProcIO instance from a given Proc instance. +func (p Proc) NewIO() (ProcIO, error) { + pio := ProcIO{} + + f, err := os.Open(p.path("io")) + if err != nil { + return pio, err + } + defer f.Close() + + data, err := ioutil.ReadAll(f) + if err != nil { + return pio, err + } + + ioFormat := "rchar: %d\nwchar: %d\nsyscr: %d\nsyscw: %d\n" + + "read_bytes: %d\nwrite_bytes: %d\n" + + "cancelled_write_bytes: %d\n" + + _, err = fmt.Sscanf(string(data), ioFormat, &pio.RChar, &pio.WChar, &pio.SyscR, + &pio.SyscW, &pio.ReadBytes, &pio.WriteBytes, &pio.CancelledWriteBytes) + if err != nil { + return pio, err + } + + return pio, nil +} |