On Wed, Apr 11, 2012 at 13:41, Satyam Shekhar <[email protected]> wrote: > Hi, > > I am trying to understand the output of the v8 profiler. Below is the > profiler output for my app. > > I have the following doubts. > > 1. What are unaccounted ticks?
The profiler is sampling based. That is, it wakes up at regular intervals (ticks) and records where the instruction pointer is. If the IP points to an address that cannot be resolved to a function, the tick is reported as unaccounted. > 2. What does nonlib col mean? > I think it means, that x% of the non-lib time was spent here. -- pls > correct me if I m wrong. That is correct, to the best of my understanding. > 3. When I tried adding the ticks from shared libraries + javascript it was > <(slightly) total ticks. Why is that? There is a cut-off point. Functions that barely register aren't printed. > 4. Which line in shared libraries(I am assuming it is counted there) account > for GC ticks? None. GC is accounted for separately under the (aptly named I daresay) section "GC": 36,598 ticks or 14.1% of total run time in your case. > 5. What does the output in JS section mean? > to be specific - > -- meaning where in the call stack is the function corresponding to > the line. > -- can the number of ticks in line be included in another. I don't understand what you mean by that. -- Job Board: http://jobs.nodejs.org/ Posting guidelines: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines You received this message because you are subscribed to the Google Groups "nodejs" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nodejs?hl=en?hl=en
