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AdoredTV: Pascal DPC Latency investigated.

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Is it really an issue or not? AdoredTV investigates, very interesting. turns out people may be jumping on a bandwagon because they are self inflicting DPC Latency.

 
I remember when I bought a Creative USB headset, having it plugged in caused CPU spikes and DPC issues. Only thing that fixed it was when my MB died and it got replaced.
 
N19h7m4r3 said:
That's what I thought the second I saw it was AdoredTV :p :D

Also didn't NVIDIA address this in a recent'ish patch, which reduced the issue a good bit?
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I hadn't paid a huge amount of attention to it but is this the problem Nvidia said they identified replicated, it was a driver bug and they would find a fix for it(though it took them some time)?

If so, saying it was never an issue seems.... stupid. This seems rather like those saying there was never a Kepler performance problem.... after Nvidia admitted the problem, promised a fix and released a kepler fix driver which significantly improved performance which had been lacking for the prior 6 months. Apparently it never happened despite Nvidia admitting it because if you test a post fix driver there is no evidence of lacking performance.

Personally, the AdoredTV guy was wrong on pretty much every single thing he said about Polaris... people keep linking to him and taking his videos seriously though. He puts in effort but he's consistently wrong which trumps how much effort or how convincing his videos are.

EDIT:- I went ahead and watched it, the guy is an idiot. He didn't actually have any noticeably latency problems, others are reporting a problem, having stuttering... it's being called a stuttering issue all over Nvidia forums. They then due to the stuttering find latency monitors to check if it shows anything. He never had the initial problem, saw a latency spike and finally realised there was a spike when alt-tabbing. But he never had any symptoms.

All the people complaining about stuttering which again Nvidia said they replicated, are not talking about alt-tabbing. This is my issue with him, he completely fundamentally mixed issues and comes up with stupid explanations. Other people don't have stutter because there is latency when alt-tabbing... :rolleyes::rolleyes:
 
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Think the video kind of misses the point - a small number of people have seen consistent spikes of high latency while gaming - using real time monitoring not just a measure of the highest latency seen and definitely not from alt-tabbing. I do think though that for the larger number of the people complaining about it it is probably due to a combination of software (and probably a bit of poor housekeeping on their PC).

That said with my 1070 over a variety of drivers and software, etc. I've not seen any signs of that problem myself.
 
I suppose he feels the need to get more Nvidia positive videos out to combat the Fanboy claims directed at him and be taken seriously by both camps, Probably hoping to build a younger fan base where a lot of what he explains sounds too complicated so they just take his word for it and wave that flag.
 
fs123 said:
Can you suggest a better method?

Latencymon has helped me in the past when experiencing audio crackle so it's a good way of finding problems and to make sure your system is running optimally.
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he needed to actually find a way of finding the symptoms, ie, stuttering is the symptom, he used a card that had no symptoms and managed to diagnose that alt-tabbing, the sole intent of which is to interrupt full control that was handed to the game for fullscreen mode, causes a system interrupt, and then decided that if you don't play fullscreen, that system interrupt doesn't occur, and thus the DPC latency issue doesn't exist.

One, there are latency monitors that don't just show a max and current, but you know, a graph, which lets you see if there are multiple spikes or not and on which the alt tab spike would be painfully visible and most importantly, you need to have the symptom before attempting to find out what the problem is. If there is no problem with the card, looking for latency issues is a non starter and just frankly ridiculous.

This video is the equivalent of every idiot on a forum who says, "I didn't have a driver problem, therefore the drivers are fine", or the other type "I had a problem with drivers when I had card X, thus card X is awful and everyone who uses it must have the same problem". He basically said, he found the DPC latency issue and it wasn't a problem for him so it's probably not a problem for anyone else.
 
fs123 said:
Can you suggest a better method?

Latencymon has helped me in the past when experiencing audio crackle so it's a good way of finding problems and to make sure your system is running optimally.
Click to expand...

DPC Latency Checker gives a graph that can be useful for seeing what is actually happening over time and helping to narrow down the cause and how much of an impact it is really having (you need more than 1 tool really to investigate it in any meaningful way).
 
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Well, I have the a latency problem when watching movies on my 1070. Same PC, no problem with a 290. Put in the 1070 and movies stutter every so often.
 
melmac said:
Well, I have the a latency problem when watching movies on my 1070. Same PC, no problem with a 290. Put in the 1070 and movies stutter every so often.
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Well based off this video.... stop alt-tabbing while watching a movie. /s

A lot of people are talking about stutter, I'm fairly sure Nvidia have said they have replicated it and are looking to fix it, not sure if they did or not yet.
 
DPC latency can be a real pain in the back side to figure out and fix.
When I had this happen to me it turned out to be my Intel rapid storage where you cache a ssd with a hard drive.
 
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