On Wed, May 26, 2021 at 2:31 AM varun...@gmail.com <varun.1...@gmail.com> wrote: > > Thanks @Ian for the clarification. > > The BySize arrays gives the number of active objects in a size class but it > does not give the total memory allocated for a size class. E.g, for 1k size > class, if 100K was the total size allocated and there are only 10 objects in > it, it does not tell the memory consumption of these 10 objects. > > I partially got what I am looking from the core dump. Taking core dump of the > process and analysing it with viewcore shows the follows: > > (viewcore) breakdown > all 11055939584 100.00% > text 28172288 0.25% > readonly 7422455808 67.14% > data 3137536 0.03% > bss 1497206784 13.54% (grab bag, includes OS thread > stacks, ...) > heap 2037923840 18.43% > in use spans 1340497920 12.12% > alloc 1306139856 11.81% > live 269335312 2.44% > garbage 1036804544 9.38% > free 19920896 0.18% > round 14437168 0.13% > manual spans 424214528 3.84% (Go stacks) > alloc 420808704 3.81% > free 3405824 0.03% > free spans 273211392 2.47% > retained 256065536 2.32% (kept for reuse by Go) > released 17145856 0.16% (given back to the OS) > ptr bitmap 65011712 0.59% > span table 2031616 0.02% > (viewcore) > > Cross referencing the output with this comment: > https://github.com/golang/go/issues/32284#issuecomment-497851388, alloc -> > heap -> in use spans seems to be HeapInUse. In the alloc of 1306139856 bytes, > there seems to be 1036804544 garbage. > > I have a follow-up question on this: > > For the memory profile taken around the same time as core dump, the total > memory seems to be 688M > (pprof) top 10 > Showing nodes accounting for 592.62MB, 86.06% of 688.58MB total > Dropped 178 nodes (cum <= 3.44MB) > > alloc -> heap -> in use spans -> live only accounts for 269M. Is the rest > ~420M in the profile coming from StackInUse (alloc -> heap -> manual spans)? > > Is it always the case that StackInUse is shown in heap profile ?
I'm not sure, sorry. Ian -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CAOyqgcXSonE5Ypv97Bbv2YGrF9-5kRPpEiNgBp%2BCBA62Y0K52Q%40mail.gmail.com.
