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Merge pull request #612 from camsys/backports
Operational updates
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,130 @@ | ||
| import datetime | ||
| import os | ||
| import time | ||
| from multiprocessing import Pipe, Process | ||
|
|
||
| import psutil | ||
|
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||
| def record_memory_usage( | ||
| logstream, event="", event_idx=-1, measure_uss=False, measure_cpu=False, pid=None | ||
| ): | ||
|
|
||
| if pid is None: | ||
| pid = os.getpid() | ||
| current_process = psutil.Process(pid) | ||
| with current_process.oneshot(): | ||
| process_name = current_process.name() | ||
|
|
||
| if measure_uss: | ||
| try: | ||
| info = current_process.memory_full_info() | ||
| uss = info.uss | ||
| except (PermissionError, psutil.AccessDenied, RuntimeError): | ||
| info = current_process.memory_info() | ||
| uss = 0 | ||
| else: | ||
| info = current_process.memory_info() | ||
| uss = 0 | ||
|
|
||
| if measure_cpu: | ||
| cpu_pct = current_process.cpu_percent() | ||
| else: | ||
| cpu_pct = -1 | ||
|
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| full_rss = rss = info.rss | ||
|
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| num_children = 0 | ||
| for child in current_process.children(recursive=True): | ||
| try: | ||
| child_info = child.memory_info() | ||
| full_rss += child_info.rss | ||
| num_children += 1 | ||
| except (psutil.NoSuchProcess, psutil.AccessDenied) as e: | ||
| pass | ||
|
|
||
| timestamp = datetime.datetime.now().strftime("%Y/%m/%d %H:%M:%S.%f") # sortable | ||
|
|
||
| print( | ||
| f"{process_name}," | ||
| f"{pid}," | ||
| f"{int(rss)}," | ||
| f"{int(full_rss)}," | ||
| f"{int(uss)}," | ||
| f"{cpu_pct}," | ||
| f"{event_idx}," | ||
| f"{event}," | ||
| f"{num_children}," | ||
| f"{timestamp}", | ||
| file=logstream, | ||
| ) | ||
|
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|
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| def monitor_memory_usage( | ||
| pid, | ||
| conn, | ||
| interval=0.5, | ||
| flush_interval=5, | ||
| filename="/tmp/sidecar.csv", | ||
| measure_uss=True, | ||
| measure_cpu=True, | ||
| ): | ||
| event = "" | ||
| event_idx = 0 | ||
| last_flush = time.time() | ||
| if measure_cpu: | ||
| psutil.cpu_percent() | ||
| with open(filename, "w") as stream: | ||
| MEM_LOG_HEADER = ( | ||
| "process,pid,rss,full_rss,uss,cpu,event_idx,event,children,time" | ||
| ) | ||
| print(MEM_LOG_HEADER, file=stream) | ||
| while True: | ||
| # timestamp = datetime.datetime.now().strftime("%Y/%m/%d %H:%M:%S.%f") # sortable | ||
| # print(f"{timestamp} [{event}]", file=stream) | ||
| record_memory_usage( | ||
| stream, | ||
| event=event, | ||
| event_idx=event_idx, | ||
| measure_uss=measure_uss, | ||
| measure_cpu=measure_cpu, | ||
| pid=pid, | ||
| ) | ||
| if conn.poll(interval): | ||
| event_ = conn.recv() | ||
| if event_ != event: | ||
| event_idx += 1 | ||
| event = event_ | ||
| else: | ||
| pass | ||
| now = time.time() | ||
| if now > last_flush + flush_interval: | ||
| stream.flush() | ||
| last_flush = now | ||
| if event == "STOP": | ||
| stream.flush() | ||
| break | ||
|
|
||
|
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||
| class MemorySidecar: | ||
| def __init__(self, filename="/tmp/sidecar.csv"): | ||
| self.local_conn, child_conn = Pipe() | ||
| self.sidecar_process = Process( | ||
| target=monitor_memory_usage, | ||
| args=(os.getpid(), child_conn), | ||
| kwargs=dict(filename=filename), | ||
| ) | ||
| self.sidecar_process.start() | ||
|
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| def stop(self): | ||
| self.set_event("STOP") | ||
| self.sidecar_process.join(timeout=5) | ||
| if self.sidecar_process.exitcode is None: | ||
| self.sidecar_process.kill() | ||
| print("memory sidecar stopped") | ||
|
|
||
| def set_event(self, event): | ||
| try: | ||
| self.local_conn.send(str(event)) | ||
| except BrokenPipeError: | ||
| pass |
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