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I am running a program with go 1.4 and I am trying to pass a large struct to a go function.
go ProcessImpression(network, &logImpression, campaign, actualSpent, partnerAccount, deviceId, otherParams)
I get this error:
runtime.newproc: function arguments too large for new goroutine
I have moved to pass by reference which helps but I am wondering if there is some way to pass large structs in a go function.
Thanks,
237
When we send data into the channel using a GoRoutine, it will be blocked until the data is consumed by another GoRoutine. When we receive data from channel using a GoRoutine, it will be blocked until the data is available in the channel.
The most common way to handle errors is to return the error type as the last return value of a function call and check for the nil condition using an if statement.
Error using Errorf() in Golang We can also handle Go errors using the Errorf() function. Unlike, New() , we can format the error message using Errorf() . This function is present inside the fmt package, so we can directly use this if we have imported the fmt package. Let's see an example.
Some people learn that “a goroutine takes up around 2 kilobytes”, most likely referencing the Go 1.4 release notes, and even fewer learn that this represents its initial stack size.
No, none I know of.
I don't think you should be too aggressive tuning to avoid copying, but it appears from the source that this error is emitted when parameters exceed the usable stack space for a new goroutine, which should be kilobytes. The copying overhead is real at that point, especially if this isn't the only time these things are copied. Perhaps some struct either explicitly is larger than expected thanks to a large struct member (1kb array rather than a slice, say) or indirectly. If not, just using a pointer as you have makes sense, and if you're worried about creating garbage, recycle the structs pointed to using sync.Pool.
133
I was able to fix this issue by changing the arguments from
func doStuff(prev, next User)
to
func doStuff(prev, next *User)
The answer from @twotwotwo in here is very helpful.
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