How to achieve high concurrency in golang?

Golang’s method of achieving high concurrency: First, M is associated with a kernel thread, and through the scheduling of scheduler P, it connects to one or more G; then based on the one-to-one relationship between M and P, through P Schedule N Gs; finally realize the many-to-many relationship between kernel threads and Gs [M:N].

golang’s method of achieving high concurrency:

go language uses MPG mode to implement CSP

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has a lot to do with traditional concurrency Threads will only increase CPU and memory overhead. Too many threads will consume a large amount of computer hardware resources, causing a concurrency bottleneck.

• M refers to Machine. An M is directly associated with a kernel thread.

• P refers to "processor", which represents the context environment required by M and is also the processor that handles user-level code logic.

• #G refers to Goroutine, which is actually a lightweight thread in nature.

My personal understanding: M is associated with a kernel thread, and through the scheduling of scheduler P (context), one or more can be connected G is equivalent to dividing a kernel thread into N user threads. M and P have a one-to-one relationship (but the relationship changes in actual scheduling). N Gs are scheduled through P (P and G have a one-to-many relationship). ), realizing the many-to-many relationship (M:N) between the kernel thread and G. In this way, one kernel thread can start N Goroutines, and the number of user threads available for machines with the same hardware configuration will increase geometrically, and the concurrency will be greatly increased. improve.

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