It's possible that the HD may be a contributory factor, especially if you use particularly slow magnetic platter drives. The most common cause of local lag is the CPU. You may need to deal with numerous low-level basic tech support before getting anybody that's useful on a technical level. If you suspect that there's a line quality issue at play, you should definitely call up your ISP's customer service. You might be able to get some new paths by resetting your modem, but other than that, you have very little control over the total latency between the parties. As such, there is nothing you can do about it. Things like last mile saturation if you live in a particularly busy place for Internet activity or having line quality issues or using wireless may contribute to this, but in general, it's not a function of your connection. This means that the lag you experience to another user isn't generally so much a function of your individual connections, it's more about the paths between you. In practice, routes are frequently cached and used for speed improvements, but you can't make any guarantees as to the route that traffic will take. In addition to this, traffic may change routes every single packet. It also means that "incorrect guesses" may be made - that is, each node may prioritize things that are not important to you or gaming. This is why major backbones being bad means that it's unlikely that your connections will be very good. But it may depending on how routing goes. For example, if you look at the geography of Florida and Georgia, you wouldn't think that a packet between the two might end up in Illinois. However, this means that traffic may end up in bizarre places. For some points, that might be avoiding points with low availability. For some points, that might be avoiding points that are heavily saturated. For some points, that might be emphasizing geography. For some points, that might be utilizing very low-latency hops. Each spot has some picture of how to get the traffic "closer" to your destination and advanced heuristics are used in order to send traffic "optimally." For some points, that might be decreasing the quantity of hops. Internet routing is important because when you establish a "direct" connection, what actually happens is the traffic is sent through roughly 10-15 different points as it travels "toward" the destination. This could be a function of Internet routing or in rare cases, it could be a function of your connection. If you have significant packet loss, Dolphin won't get appropriate packets to compute ping properly. There are some situations in which you would see significant spikes in the netplay lobby as a result of Internet quality. If they're broken (high packet loss, low network availability, or high pings), don't expect a positive experience. If you live in the US, backbonesmay contribute significantly to connection lag. The vast majority of connections have 3-7ms of jitter. This would be an especially bad jitter value and it would mean that if, for example, your average ping is 60ms, your ping sways from 45ms to 75ms. This means that it feels very different from not having the local resources to run properly, which will instead drop frames during emulation and also run more frames to "catch up." Connections tend to have at most 15ms of jitter. This is easy to spot because you will typically see consistent pings in the netplay lobby and emulation stops entirely when your buffer runs out. Feel free to read over this guide if you find it more helpful but if you're looking for more direct and actionable information, the other guides are better choices.įirst and foremost, we will look at Internet lag. The information is still accurate, but it's laid out in a more helpful form at Internet Troubleshooting and Computer Troubleshooting. UPDATE 20AUG2017: This guide is slightly outdated. These two things are very different and it's easy to confuse them because Dolphin's ping computation depends on having no local lag for accuracy. When Dolphin is having issues running, there may be two causes: Local lag or connection lag.
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