Windows 10: How to interpret the Task Manager stats

  1.    04 Apr 2016 #1

    How to interpret the Task Manager stats

    I am trying to figure out where is the bottleneck in my system, namely disk I/O or CPU, for my video editng tasks.

    I newly loaded Win 10 Pro on a SSD drive, but found no difference in the final encoding performance, whether I put all the Video files on the SSD or a SATA 3 HD.

    So I ran the Task Manager, but was just as clueless, as the data does not make sense.

    I look the CPU Performance, it was never fully utilised. I presume the BLUE graph is the speed of the CPU, it varies when I change the Power setting to Balanced, and fixed at 3.2Ghz when High Performance was set. But the GREEN graphs utilitisation ( I think ) was never more than 40%, I thought OK may be it is disk bound

    But looking at the disk performance whether the files are on SATA 3 HD or SSD, they were never utilized to more than 10% or so.

    So it seems that the system is not disk I/O or CPU bound, what can it be?

    The system was newly booted, and no other Apps are running. In fact, the Task Manager is not showing anything else that is remotely significant in the background.

    Can someone help to explain this, or am I missing some other parameters?

      My ComputerSystem Spec

  2. Fafhrd's Avatar
    Posts : 1,928
    Windows 10 x86 14383 Insider Pro and Core 10240
       04 Apr 2016 #2

    You do not say how the "bottleneck" manifests itself.

    Pictures say much more than words, and allow for more detailed answers - can you provide screenshots or snips that indicate what you say?

    In particular the Task Manager data that "does not make sense".

    Of course when involved with Video editing, you won't be looking at the Task Manager, or even the Resource monitor with its more detailed graphs and component resource monitors. No doubt you could switch to your editing task, do something, then return to the resource graphs to see any increase in activity.

    The event viewer logs may indicate any problem.
      My ComputersSystem Spec

  3.    05 Apr 2016 #3


    The problem is through the Task Manager, I do not see any bottleneck. To me, with only just a single problem running with some background tasks, the program must somehow hit either CPU or disk I/O bottleneck, but not through what I saw in the Task Manager. I shall get some screen shots.

    But CPU usage was only about 40-50%, disk I/O still has plenty of bandwidth left, so why the system run faster until either one of those hits the limit? May be I don't understand enough about time-sliced multitasking system. I am used to real-time multitasking systems.

    If there are not bottleneck showing up, why can't the program run faster.....that's my point. So there must be a hidden bottleneck or mis-tuning of the system somewhere.

      My ComputerSystem Spec

  4. Fafhrd's Avatar
    Posts : 1,928
    Windows 10 x86 14383 Insider Pro and Core 10240
       05 Apr 2016 #4

    Ffrree, I wonder if you would get a more informed response in a forum with focused interests in Video processing and editing, where hardware performance and tuning for this sort of task with specialist software must be a regularly discussed subject? Here on Tenforums, much of the discourse concerns tangible performance issues which interfere with even normal everyday PC use following systems installed or upgraded to Windows 10.

    Feel free to supply some information regarding your suspicions and findings and someone here with interests that transect yours will surely offer some helpful suggestions.
      My ComputersSystem Spec

  5.    05 Apr 2016 #5

    It is very possible for a multi core CPU to be a bottleneck even when total CPU usage isn't high. Most applications have limits on the number of cores they can use efficiently. Creating an application that can efficiently use multiple cores is difficult and many do not do it well. If one or more individual cores has high usage this is likely the case. Video editing is very CPU intensive.
      My ComputerSystem Spec


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