dxr performance

DxR route lookup algorithm-forward and dxr-forwardWhat kind of computing in a general computer that now carries a modern operating system looks and must be super fast? No doubt, the answer is memory access. What kind of computing in a general computer that now carries a modern operating system looks very slow theoretically? There is no doubt that the answer is routing addressing. It's really boring to have

corresponds to rule.Then, the DXR algorithm is a step-by-step optimization for the above diagram. In order to better illustrate the DXR, I give the transformation form again:Interval Lookup If you follow the above diagram, the entire IPV4 address space is divided into n intervals, and the final goal of the routing lookup is to correspond a IPV4 address to a certain interval! So far, the work is done. But t

the price for it? If we consider the MMU facility, we will find that the compact data structure saves space and improves speed.Our long-term education is to take righteousness must sacrifice such an education, if not sacrifice, not to be righteous, may also be blackmailed, not blame themselves for being false, because they did not die. In fact, even if the resources are not so abundant, even the resources are scarce, the compact data structure will surely lead to a waste of time? Or is it that

Simulate MMU to design a route table that indexes IPv4 addresses, which is different from DxR and mmudxr.I don't know if anyone has played this game. Maybe, maybe not.Time and space are always on the opposite sides. because of incomplete facilities, you can only choose when resources are scarce. However, if the resources are abundant, you can have both the fish and the bear's paw! For route search, the compact data structure occupies a small amount of

protect itself from the benefits of its goals. However, as we all know, it was eventually designed. And, thanks to the efficient use of the CPU cache, the MMU degenerated into a slow path that will only be enabled when the cache is not hit, and by locality we know that most of the time, the flow of execution is fast ... It seems that the idea should be changed a bit.I know that the DXR algorithm is the way it is, so it's not my personal nonsense. But

Simulate MMU to design a route table that indexes IPv4 addresses, unlike DxR. I don't know if anyone has played this game. Maybe, maybe not. Time and space are always on the opposite sides. because of incomplete facilities, you can only choose when resources are scarce. However, if the resources are abundant, you can have both the fish and the bear's paw! For route search, the compact data structure occupies a small amount of space. Is it time-consumi

protect itself from the benefits of its goals. However, as we all know, it was eventually designed. And, thanks to the efficient use of the CPU cache, the MMU degenerated into a slow path that will only be enabled when the cache is not hit, and by locality we know that most of the time, the flow of execution is fast ... It seems that the idea should be changed a bit.I know that the DXR algorithm is the way it is, so it's not my personal nonsense. But

What kind of computations do you think are present in a general-purpose computer with modern operating systems that look and must be super fast, without a doubt, the answer is memory access.What kind of computing in a general-purpose computer that now carries modern operating systems looks and is theoretically super-slow, without a doubt, the answer is routed addressing.The early holiday is really boring!Why do you think memory addressing is fast? Why do you think it must be fast? Because the op

What kind of computations do you think are present in a general-purpose computer with modern operating systems that look and must be super fast, without a doubt, the answer is memory access.What kind of computing in a general-purpose computer that now carries modern operating systems looks and is theoretically super-slow, without a doubt, the answer is routed addressing.The early holiday is really boring!Why do you think memory addressing is fast? Why do you think it must be fast?Because the ope

Diagram of the route entry positioning structure based on the DxR algorithm Concept First, the question is about the positioning structure of the route entry rather than the search structure. In this case, when an IPv4 address is used as the input, the next hop is obtained, there will be no search operations. You just need to constantly use index positioning. In order to have an intuitive understanding, the search structure is given first: 1. Start wi

From failure of designing a route table in a simulated MMU to DxR RegressionIn a text written a few days ago, I described a failed experience. If I care about the process, it is a success. However, I have to roll back to DxR and study its nature rather than its algorithm ideas. The reason for my failure is that my reverse psychology is at odds. I did not really study the nature of

This article is a detailed analysis of the use of PHP performance testing tools in the production environment xhprof, the need for a friend reference Xhprof is a PHP performance testing tool that is open source for Facebook, and it can also be called the Profile tool, a word that doesn't know how to translate. There are many similarities compared to the xdebug that have been used before. Previously there

This is the fourth part of agile development performance management. (One, two, three, four, five, six, and seven) I recently read Drucker's book and found that it clearly states the concept and statement "enterprise performance only exists outside, while enterprise internal cost only, next, let's talk about the performance appraisal of the agile development

SQL Performance Optimization-Methods for locating network performance problems (DEMO) and performance optimization demo Recently, my colleague from the project team told me that he encountered an SQL Performance problem. He said that there were only 69 records in the table, and it took more than two minutes to execute

Label:Poptest is the only training institute for developing Test and development engineers in China, aiming at the ability of the trainees to be competent in automated testing, performance testing and testing tools development. In Poptest's LoadRunner training, in order to improve the performance of students experience, add a lot of server optimization knowledge, for pe