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package flamegraph
import (
"fmt"
"ior/internal/types"
"os"
"strings"
"sync"
)
type counter struct {
count uint64
duration uint64
}
func (c *counter) merge(other counter) {
c.count += other.count
c.duration += other.duration
}
// TODO: make it generic, generate multiple trace points
// path, traceid (syscall name), comm, pid, tid
// traceid, path is by default set in this order
// store an intermediate format which then can be converted to the others...
// e.g. path ¶ traceid ¶ comm ¶ pid ¶ tid ¶ flags ¶ counter
// counter can also have bytes (for reads and writes)
type collapsed map[string]map[types.TraceId]counter
// TODO: Unit test this
func (c collapsed) merge(other collapsed) (merged int) {
for k, v := range other {
if _, ok := c[k]; !ok {
c[k] = make(map[types.TraceId]counter)
}
for traceId, cnt := range v {
if existingCnt, ok := c[k][traceId]; ok {
existingCnt.merge(cnt)
merged++
c[k][traceId] = existingCnt
continue
}
c[k][traceId] = cnt
}
}
return
}
func (c collapsed) dump() {
var wg sync.WaitGroup
wg.Add(4)
go c.dumpBy(&wg, "ior-by-path-count-flamegraph.collapsed", true, func(cnt counter) uint64 {
return cnt.count
})
go c.dumpBy(&wg, "ior-by-path-duration-flamegraph.collapsed", true, func(cnt counter) uint64 {
return cnt.duration
})
go c.dumpBy(&wg, "ior-by-syscall-count-flamegraph.collapsed", false, func(cnt counter) uint64 {
return cnt.count
})
go c.dumpBy(&wg, "ior-by-syscall-duration-flamegraph.collapsed", false, func(cnt counter) uint64 {
return cnt.duration
})
wg.Wait()
}
func (c collapsed) dumpBy(wg *sync.WaitGroup, outfile string, syscallAtTop bool, by func(counter) uint64) {
defer wg.Done()
defer fmt.Println("Dumping done")
fmt.Println("Dumping", outfile)
file, err := os.Create(outfile)
if err != nil {
panic(err)
}
defer file.Close()
for path, value := range c {
var sb strings.Builder
for i, part := range strings.Split(path, "/") {
if i > 1 {
sb.WriteString(";")
sb.WriteString("/")
}
sb.WriteString(part)
}
for traceId, cnt := range value {
var err error
if syscallAtTop {
_, err = fmt.Fprintf(file, "%s;syscall`%s %v\n", sb.String(), traceId.Name(), by(cnt))
} else {
_, err = fmt.Fprintf(file, "syscall`%s;%s %v\n", traceId.Name(), sb.String(), by(cnt))
}
if err != nil {
panic(err)
}
}
}
}
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