Thanks Marco.  Indeed these 1-pixel-wide events have titles "syscall", 
"proc stoc", this in not really comparable with the first line.

On Thursday, January 12, 2017 at 2:35:21 PM UTC+1, Marko Kevac wrote:
>
> Library which is used to draw this charts have few event types internally. 
> Some event types have begin and an end (let's call them "events with 
> duration"), some are instant.
> An instant event can happen asynchronously (at the same time) with an 
> event with duration. In that case, chart library puts instant events in a 
> second row (line).
>
> On Wednesday, January 11, 2017 at 3:08:07 PM UTC+3, Val wrote:
>>
>> Hello
>> trying to analyze and optimize the work load of my goroutines, I'm using 
>> the Trace <https://golang.org/cmd/trace/> web viewer and visualize the 
>> work of each of my processors :
>>
>>
>>
>> <https://lh3.googleusercontent.com/-WVJau-oABcU/WHYdFVtXZ_I/AAAAAAAAAdc/7qfogCmWy2IqrNSFuriSc57QXNUZ0doIACLcB/s1600/trace_procs.png>
>>  
>> <https://lh3.googleusercontent.com/-KHPKC5yNGLQ/WHYftcQIw7I/AAAAAAAAAd4/zbkeRPm8i_4DM3JCju38PBQEGN5-KGzygCLcB/s1600/trace_procs_2nd_line.png>
>>
>>
>> Really useful, I love it!
>>
>> *My question is* : what is the second line (which is sparser) for each 
>> proc?
>> does it mean that each of my physical cores has 2 logical cores?  Is it 
>> related to hyperthreading?
>> Does it mean there "might be" some way of programming the tasks to better 
>> fill the second line, thus increasing overall speed?
>> Thank you for insight!
>> Val
>>
>

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