How can other goroutines keep executing whilst invoking a syscall? (when using GOMAXPROCS=1)
As far as I'm aware of, when invoking a syscall the thread gives up control until the syscall returns.
How can Go achieve this concurrency without creating a system thread per blocking-on-syscall goroutine?
From the documentation:
Goroutines
They're called goroutines because the existing terms—threads,
coroutines, processes, and so on—convey inaccurate connotations. A
goroutine has a simple model: it is a function executing concurrently
with other goroutines in the same address space. It is lightweight,
costing little more than the allocation of stack space. And the stacks
start small, so they are cheap, and grow by allocating (and freeing)
heap storage as required.
Goroutines are multiplexed onto multiple OS threads so if one should
block, such as while waiting for I/O, others continue to run. Their
design hides many of the complexities of thread creation and
management.
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