edc2d17086
It turns out if you set GODEBUG=gctrace=2, it enables an obscure debugging mode that, in addition to printing gctrace statistics, also does a second STW GC following each regular GC. This debugging mode has long since lost its value (you could maybe use it to analyze floating garbage, except that we don't print the gctrace line on the second GC), and it interferes substantially with the operation of the GC by messing up the statistics used to schedule GCs. It's also a source of mark termination GC work when we're in concurrent GC mode, so it's going to interfere with eliminating mark 2. And it's going to get in the way of unifying STW and concurrent GC. This CL removes this debugging mode. Updates #26903. This is preparation for eliminating mark 2 and unifying STW GC and concurrent GC. Change-Id: Ib5bce05d8c4d5b6559c89a65165d49532165df07 Reviewed-on: https://go-review.googlesource.com/c/134316 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Rick Hudson <rlh@golang.org> |
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