SteveW

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About SteveW

  • Rank
    Developer

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  • Gender
    Male
  • Location
    UK
  • Interests
    Writing Ideal Flight and other FS related material

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    Yes
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About Me

  • About Me
    Writing Ideal Flight - website www.codelegend.com

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  1. SteveW

    P3D running but CPU not running at max speed

    That's very funny. 😀😆 ...hold on that looks like my latest compression algorithm in binary.
  2. SteveW

    P3D running but CPU not running at max speed

    We find the number of cores, (01s) that loads the main location fastest as discussed, such as 01,00,00,01,01,00,01,01,01 = 66837 If that's too many cores, leaving not enough for the addons and system, then we can double one of the left hand ones (11), 01,11,00,01,01,01 = 1813 The app we can use is Windows Calculator, this shows the binary and decimal representations on the Programmer page. We can copy/paste (CTRL+C/CTRL+V) into the binary field (BIN) the number 01,00,00,01,01,00,01,01,01 even with the commas, this shows ‭66837‬ in the DEC field.
  3. SteveW

    P3D running but CPU not running at max speed

    1847 = 11100110111 HT off If we want HT On we first convert as such 01,01,01,00,00,01,01,00,01,01,01 = 1377557 So now we can use HT on and the sim, as far as it is concerned, continues just the same - it has no idea of the changes. That's 8 cores. How much time difference loading the main location with 6 cores and 8? 01,00,00,01,01,00,01,01,01 = 66837
  4. SteveW

    P3D running but CPU not running at max speed

    ...too much heat with HT enabled, we reduce the amount of cores where we might double the tasks for P3D (and maybe some addon). For example; with lots of cores and P3D simply allocate '01' on each P3D core, this still leaves the system to utilise the HT mode more effectively and allows the OC to push the fps up....
  5. SteveW

    P3D running but CPU not running at max speed

    Yes, the more cores there are, the more HT enabled will increase heat. Those spare cycles are used to do real computations and that means running P3D tasks more often. If we use heat generated as a guide to the work done by a CPU that might not give us the right idea. Simply because it may be set to do too much of the wrong work and not enough of the right work. It is that simple. Too much heat and not enough performance in P3D = wrong setting.
  6. SteveW

    P3D running but CPU not running at max speed

    It was the same with FSX, we could keep adding LPs (or cores) and the sim loaded faster and faster. But as more are added, eventually the sim loads half a second faster with one more core. So what do we do? If we have lots of cores do we allow that core? Maybe. If we have few cores, then it is better to not dedicate the core to a task. Look at the Task Manager graphs and we see most LPs go up to 100% during loading the scenario. These LPs 'blip' like that during the run of the sim as parts are loaded. If we allocate too many LPs to loading (on that particular machine) that takes throughput from the system and it produces less fps as the linkage is flawed. If that main task is 100% it's going to like it even less. So on any particular machine the balance is found very quickly by the loading speed test (at the heaviest airport you will be visiting). We can have multiple setups and use a different one for fast flying (pass over terrain quickly) and gliding (turning all the time) might require a slicker fps setting. Study level sim? Study the plane not the scenery!.
  7. SteveW

    P3D running but CPU not running at max speed

    Although we say 'lower fps' it's going to be the same HT On or Off with the same OC. HT Off and an increased overclock appears to allow slightly more fps because the items in the scene are loaded. But when new items are loaded then we do actually see less fps with HT Off. Again, setup not showing this behaviour is redlined somewhere, then, who knows what the performance characteristic will be.
  8. SteveW

    P3D running but CPU not running at max speed

    The heaviest place you will visit.
  9. SteveW

    P3D running but CPU not running at max speed

    What we are seeing is that the problems associated with a heavily loaded sim do not allow the sim to work in the same way as it does when loaded less. With Pete's system showing no improvement from 5 - 5.2 shows that there's a limit elsewhere unhelped by that. Having a setup working well and then moving to a location that overloads it means quite simply that's the wrong setting for that location. Seems you misunderstood me Pete. The loading speed test is suggesting you use that heaviest airport- as you say, what would be the point of the test of the easy airport - that makes no sense whatsoever. Loading the heaviest scenario a few times (so it's cached) and then comparing the time it takes to another setting is *the biggest hit the system takes* during the sim flight. Moving to another location with more throughput requirements is a basically another test another setup. The theory holds for that too.
  10. SteveW

    P3D running but CPU not running at max speed

    I'm never that confident unless I can get hands on to a system. But in Pete's case, I'm fairly sure that allowing all cores simply saturates the system. The main core reaches 100% through in some part the linkage to those repeat tasks on the extra cores. They would probably be robbing the system of fps as well. Those extra tasks are non-beneficial if those cores do not represent an increase in scenario loading time. Use only enough cores to improve the scenario loading time with the main airport. If only one or two seconds are gained by adding another core, that's probably excess to requirements. Too many cores allocated will eat into shared cache, slow down the entire process, and make more heat. If we have to ask ourselves why 4 and 6 core systems work OK. And if so, then we should be able to use four or six cores of an 8 or 10 core without issues.
  11. SteveW

    P3D running but CPU not running at max speed

    The shared cache is distributed on a per thread basis, rather than per core. So if we enable HT or not we have more or less the same number of threads and the same use of the cache. However, the HT mode applies better to that shared system - hence the cost increase for an HT mode CPU.
  12. SteveW

    P3D running but CPU not running at max speed

    Hi Pete, When talking about % use of a core, we need to know where you are in the sim, loading a scenario, flying at altitude, parked at the gate. It is terribly important to ascertain the type of situation that is required for best performance aspects, maybe that's landing for me... The reason for 100% on the main task is that it is given too much work to do. We first limit the fps for those times when there's not much to do, or the fps climbs and frames are ignored with excess heat generated. Parked in our fave. airport we set the system settings so the amount of work to do between frames can be handled without seeing 100% on that main task. If we set too high, maybe too much area or shadows whatever, the time to process that takes longer than a frame at 100% on that core. Part of that workload is the communication with that task from the other tasks. They will be seeing a harder time than need be. Restricting to four cores and not seeing the main task reach 100%? Not enough information in there for me to ascertain what's going on. HT off saves working out a few things and also saves the processor from utilising spare cycles, that's a lot on a Windows platform.
  13. SteveW

    P3D running but CPU not running at max speed

    If there's heat, then since heat = work done on the CPU, I can't see why optimising the overclock for HT would not be a benefit overall on a P3D system. The only gain to HT off is applying a few MHz more OC for a few more fps (if that), but reduces the highly threaded base of resources to a greater extent. Otherwise HT would not exist.
  14. SteveW

    P3D running but CPU not running at max speed

    I've been using the similar larger die 3960x for six years and looking to increase core count now.
  15. SteveW

    P3D running but CPU not running at max speed

    With no AM the system will allocate every LP to P3D which pushes out the resources the FSL modules are actually using.