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Code Issues Releases Activity

Allow to specify CPU usage period as duration string

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The current implementation assumes the given duration in seconds.
Instead, also allow to specify a duration in the format as expected by
`time.ParseDuration` and use that if found. If a plain integer is
specified, it is still parsed as a duration in seconds.
This commit is contained in:
Tobias Klauser
2021-07-01 10:20:45 +02:00
committed by Tobias Klauser
parent f870d0110a
commit 8918f15c19
2 changed files with 30 additions and 9 deletions
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21
README.md
View File

@ -79,7 +79,7 @@ The output displays:
Note that processes running the agent are marked with `*` next to the PID (e.g. `4132*`). Note that processes running the agent are marked with `*` next to the PID (e.g. `4132*`).
#### $ gops \<pid\> #### $ gops \<pid\> [duration]
To report more information about a process, run `gops` followed by a PID: To report more information about a process, run `gops` followed by a PID:
@ -96,6 +96,24 @@ local/remote: 127.0.0.1:56765 <-> 127.0.0.1:50955 (ESTABLISHED)
local/remote: 100.76.175.164:52353 <-> 54.241.191.232:443 (ESTABLISHED) local/remote: 100.76.175.164:52353 <-> 54.241.191.232:443 (ESTABLISHED)
``` ```
If an optional duration is specified in the format as expected by
[`time.ParseDuration`](https://golang.org/pkg/time/#ParseDuration), the CPU
usage for the given time period is reported in addition:
```sh
$ gops <pid> 2s
parent PID: 5985
threads: 27
memory usage: 0.199%
cpu usage: 0.139%
cpu usage (2s): 0.271%
username: jbd
cmd+args: /Applications/Splice.app/Contents/Resources/Splice Helper.app/Contents/MacOS/Splice Helper -pid 5985
local/remote: 127.0.0.1:56765 <-> :0 (LISTEN)
local/remote: 127.0.0.1:56765 <-> 127.0.0.1:50955 (ESTABLISHED)
local/remote: 100.76.175.164:52353 <-> 54.241.191.232:443 (ESTABLISHED)
```
#### $ gops tree #### $ gops tree
To display a process tree with all the running Go processes, run the following command: To display a process tree with all the running Go processes, run the following command:
@ -199,4 +217,3 @@ gops allows you to start the runtime tracer for 5 seconds and examine the result
```sh ```sh
$ gops trace (<pid>|<addr>) $ gops trace (<pid>|<addr>)
``` ```

18
main.go
View File

@ -55,11 +55,15 @@ func main() {
// See if it is a PID. // See if it is a PID.
pid, err := strconv.Atoi(cmd) pid, err := strconv.Atoi(cmd)
if err == nil { if err == nil {
var interval int var period time.Duration
if len(os.Args) >= 3 { if len(os.Args) >= 3 {
interval, _ = strconv.Atoi(os.Args[2]) period, err = time.ParseDuration(os.Args[2])
if err != nil {
secs, _ := strconv.Atoi(os.Args[2])
period = time.Duration(secs) * time.Second
}
} }
processInfo(pid, interval) processInfo(pid, period)
return return
} }
@ -131,7 +135,7 @@ func processes() {
} }
} }
func processInfo(pid, interval int) { func processInfo(pid int, period time.Duration) {
p, err := process.NewProcess(int32(pid)) p, err := process.NewProcess(int32(pid))
if err != nil { if err != nil {
log.Fatalf("Cannot read process info: %v", err) log.Fatalf("Cannot read process info: %v", err)
@ -148,9 +152,9 @@ func processInfo(pid, interval int) {
if v, err := p.CPUPercent(); err == nil { if v, err := p.CPUPercent(); err == nil {
fmt.Printf("cpu usage:\t%.3f%%\n", v) fmt.Printf("cpu usage:\t%.3f%%\n", v)
} }
if interval > 0 { if period > 0 {
if v, err := cpuPercentWithinTime(p, time.Second*time.Duration(interval)); err == nil { if v, err := cpuPercentWithinTime(p, period); err == nil {
fmt.Printf("cpu usage (%ds):\t%.3f%%\n", interval, v) fmt.Printf("cpu usage (%v):\t%.3f%%\n", period, v)
} }
} }
if v, err := p.Username(); err == nil { if v, err := p.Username(); err == nil {