Low-jitter/low-latency hardware.

[Paradox Uncr8ed]

As I just posted elsewhere, it seems that jitter is known on windows as "microstutter". And Battlefield 3 measures it as "frametime". So, having set some attention on it, hopefully there will come attention and benchmarks on it, for linux aswell.

Obviously a whole lot of people need to be informed that this exists, is real, and a whole lot of babble reduced.

So if "jitter" in topic was hard to understand, however it really is what this is about, also known as "os-jitter", particulary on linux-servers, where work has been done to reduce it, maybe Battlefields 3s "frametime" is what a lot of people here should be looking at. However if you think 50uS DPC latency on windows is good, and can`t see that I just posted about 5uS DPC latency, I don`t really know, there is problem with communication.

Ofcourse the 5uS DPC tweaked machine, is what "frametime" numbers would be interesting with.

Peace Be With You.

 

[Hitman928]

harrkev: Can you please shut the f*ck up, and keep on topic.

First off, you need to calm down, he's just trying to help.

Second, the only time I've heard of anyone concerned with or even mention OS-jitter is in cluster computing where you have multiple nodes working in parallel where the disparity between the real time progress of each node and their communication latency can cause noticeable jitter and can reek havoc for certain work loads. This is probably the reason why most people don't know what you're referring to, you're the first person I've met that cares about it for a single computer. Granted, the same principles apply to a single computer as your programs will always have multiple layers to work through and other processes to share the computer's resources with, it's just not usually ever noticeable for the vast majority of workloads and if it is noticeable for a particular work load, people usually will then get specialized hardware or a real time operating system to work with if latency is that big of a deal.

As others have said, it would help if you told us what you use the computer for as we could guide you to more specific hardware. You've mentioned a couple of things but not really confirmed what specifically the use of the computer is that you want to tailor. Can you tell us specifically what the computer will be used for or are you just looking for more "smoothness" in general?

Lastly, I think others have tried to tell you in not so specific ways that for a single computer, the hardware you use (if you get really modern hardware) is probably the last and smallest contributor to "jitter" on a modern computer. The software you deal with will have a far greater impact than the hardware you choose. Again, assuming you are using the computer for standard use and not something extremely latency sensitive.

Hope this helps.

Regards

 

[Paradox Uncr8ed]

Ok this thread has proven completely useless. It is on par with "certified ms engineers" who recommend not turning off services. Getting advice on hardware for lowest timing jitter, should prove to be the most difficult thing. I mean when you touch a subject like this, and want something particular, 10 monkeys are going to tell you not to do this, not understanding why, and lacking the capacity to even understand well-written replies.

I mean seriously. Internet lol. Something is wrong somewhere, when people obviously lacking capacity, talks as experts and leads people in the wrong way. In another thread, even if I talk very specifically about things, some moron STILL is going to accuse you and make completely rabid statements, even if the line of thought should be clear.
And this goes for what I do with DSP too. That is the worlds best. Still some people say they prefer a sound from the 1950s before the era of HiFi. I made a comment about Einstein, even he does math involving infinity. There are so many concepts in the world, that people think are popular, yet are completely trash. Einstein, tube-amps, vinyl etc. Liberal politics. And that goes for latency and jitter in a computer aswell. If I say I want low-jitter hardware, I mean that. And if you cannot understand what I mean by that, please stay out of the discussion. It is NOT FOR YOU. I don`t need your feeble "observations".

So.. how to improve 5uS DPC latency on windows. Then you tighten up the hardware wherever you can.

So.. E5 2600 series is for graphics workstations and low-latency trading, including intergrated i/o that reduces latency. Reduced latency = improved jitter. And obvious choice, for low jitter hardware.
Then we have bus, which should ofcourse have the fastest ram possible, and therefore a mainboard where ram can be overclocked.
etc etc. If you have any experience at all with computing, you should see clearly where I want to go.

Peace Be With You.

 

[Paradox Uncr8ed]

At this point I should have detailed this to the extent that, advising against now, would really be a cottaging-activist, trying to talk morals to a religious man. - And thus ignored.

 

[serpretetsky]

In the mean time, the masses are unaware of jitter, unless it is very noticable such as recent discussions on "microstutter".
Most still advise to "not turn off services" in windows, yet show me benchmarks of "motherboards" with DPC latency of 50-300uS. I am already running at 5uS in windows here. And it is not "the motherboard". This is about OS-jitter.

i'm actually curious, can you run http://www.thesycon.de/deu/latency_check.shtml and post a screenshot?

 

[serpretetsky]

As I just posted elsewhere, it seems that jitter is known on windows as "microstutter".

microstutter is a "defect" if the video rendering process between two cards. It's very specific and is detailed here: http://techreport.com/review/21516/inside-the-second-a-new-look-at-game-benchmarking (my favorite review of this topic)

I don't think it's what you referring to, since you seem to be referring to the OS, and microstutter has nothing to do with the OS at all, simply a mistiming of frames between two cards.

 

[Paradox Uncr8ed]

You can do the tweak yourself and do a "screenshot". And if lower DPC latency improves "microstutter" 5uS should really help with that aswell. An argument used in the "microstutter" debate, is variation in "frametime". Variation in frametime is reduced with lower DPC latency.

Peace Be With You.

 

[Paradox Uncr8ed]

Since this seems to represent such a leap in thought, you really should make a small partition, 10GB will do, install Windows XP on it, and a good game for testing, such as HL2, which you can get on steam. XP has the lowest DPC latency. Do the tweak, and realize how good it is, and have a great time with HL2. Also ofcourse notice the increased responsiveness from the system as a whole. I think that is good inspiration to take forward to future h/w and software buys. Indeed, fumbling without knowing this is, is to fumble blindly.

Peace Be With You.

 

[oynaz]

Peace Be With You.

Read:
Unless you disagree with me, then you can shut the fuck up, while I persist in insulting everyone trying to help me.

 

[Paradox Uncr8ed]

Some people obviously have big thoughts of themselves, and persist in claiming that they help, when indeed they are doing nothing but the most mindless of obscuration of facts. It`s like telling the guy who is driving his porche, no no no, this Lada engine is better. "we are trying to help".

Now do what I said, and get to know a world of higher technology, and stop being completely inane, and babbling in it`s service.

Peace Be With You.

 

[Paradox Uncr8ed]

I think it`s going to be a little bit of a computing judgement day to many. Imagine the bitchface when he realizes all those services and misconfigs, are what he defends, and it is completely wrong, and this he means people shall buy, and himself. It is going to get extremely hard to defend that position. (lol)

Peace Be With You.

 

[Paradox Uncr8ed]

Listen, I`d rather have you listen, and correct your assumption on latency and jitter. Imagine if your computer could do instant videophone, like a cellular. That proves it is possible to do low-latency long-distance communication. Bufferbloat on the internet is the same problem. So you know, acknowledge and be happy, and lame delays will be gone.

Peace Be With You.