Refactor display iteration/state and harden collector runtime

1 files changed, 46 insertions, 0 deletions

diff --git a/internal/stats/types.go b/internal/stats/types.go
new file mode 100644
index 0000000..4094d2d
--- /dev/null
+++ b/internal/stats/types.go
@@ -0,0 +1,46 @@
+package stats
+
+// CPULine is one line of /proc/stat: cpu name + counters (user, nice, system, idle, ...).
+type CPULine struct {
+	Name                                                                    string
+	User, Nice, System, Idle, Iowait, IRQ, SoftIRQ, Steal, Guest, GuestNice int64
+}
+
+// Total returns sum of all CPU counters.
+func (c CPULine) Total() int64 {
+	return c.User + c.Nice + c.System + c.Idle + c.Iowait + c.IRQ + c.SoftIRQ + c.Steal + c.Guest + c.GuestNice
+}
+
+// MemLine is one key from /proc/meminfo (e.g. MemTotal, MemFree).
+type MemLine struct {
+	Key   string
+	Value int64
+}
+
+// NetLine is one interface line: iface and key=value pairs (b, tb, p, tp, e, te, d, td).
+type NetLine struct {
+	Iface string
+	B     int64 // rx bytes
+	Tb    int64 // tx bytes
+	P     int64
+	Tp    int64
+	E     int64
+	Te    int64
+	D     int64
+	Td    int64
+}
+
+// LoadAvg is 1/5/15 min load average.
+type LoadAvg struct {
+	Load1, Load5, Load15 string
+}
+
+// DiskLine is one device from /proc/diskstats with cumulative counters.
+type DiskLine struct {
+	Device       string
+	SectorsRead  int64 // cumulative sectors read (each sector = 512 bytes)
+	SectorsWrite int64 // cumulative sectors written
+	ReadTicks    int64 // cumulative ms spent reading
+	WriteTicks   int64 // cumulative ms spent writing
+	IoTicks      int64 // cumulative ms the device had I/O in progress
+}