PerfMonComps: Short-term workaround for missing psutil in LCG 97a_ATLAS_1

The psutil module is missing in LCG 97a_ATLAS_1. Currently PerfMonMTSvc gets the application start time using that module and this causes the issue raised in [1]. This MR essentially provides a workaround to this problem such that we can recover performance related metrics in jobs w/ threads>1. A more proper way of handling dependencies will be implemented in a future MR such that we catch similar issues at build time. Also, we'll need to eventually include the module in a future LCG release and/or find another way to extract that information (which can also be done on the C++ side, of course).

[1] ATLASRECTS-5592

Control/PerformanceMonitoring/PerfMonComps/share/PerfMonMTSvc_jobOptions.py

@@ -4,7 +4,7 @@
 from AthenaCommon.Logging import logging
 from AthenaCommon.AppMgr import ServiceMgr as svcMgr
 from AthenaCommon.ConcurrencyFlags import jobproperties as jp
-import os,psutil
+import os
 
 log = logging.getLogger("PerfMonMT")
 log.info("Setting up PerfMonMT...")
@@ -16,7 +16,13 @@ if not hasattr(svcMgr, 'PerfMonMTSvc'):
     from PerfMonComps.MTJobOptCfg import PerfMonMTSvc
     svcMgr += PerfMonMTSvc("PerfMonMTSvc")
     # Set the job start time
-    svcMgr.PerfMonMTSvc.wallTimeOffset = psutil.Process(os.getpid()).create_time() * 1000 # Get the job start time in ms
+    try:
+        import psutil
+        svcMgr.PerfMonMTSvc.wallTimeOffset = psutil.Process(os.getpid()).create_time() * 1000 # Get the job start time in ms
+    except Exception:
+        log.warning("Cannot import psutil, wall-time measurements will be biased due to biased offset")
+        import time
+        svcMgr.PerfMonMTSvc.wallTimeOffset = time.time() * 1000 # Get the current time in ms as a substitute
     # Set number of threads/slots
     svcMgr.PerfMonMTSvc.numberOfThreads = max(1,jp.ConcurrencyFlags.NumThreads())
     svcMgr.PerfMonMTSvc.numberOfSlots = max(1,jp.ConcurrencyFlags.NumConcurrentEvents())