because it made a system call or tried to acquire a mutex.
Directly underneath each bar, a smaller bar or more commonly a fine
- vertical line indicates an event occuring during its execution.
+ vertical line indicates an event occurring during its execution.
Some of these are related to garbage collection; most indicate that
a goroutine yielded its logical processor but then immediately resumed execution
on the same logical processor. Clicking on the event displays the stack trace
function written in C.
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- Above the event trace for the first logical processor are
+ Above the event trace for the first logical processor are
traces for various runtime-internal events.
The "GC" bar shows when the garbage collector is running, and in which stage.