On my machine before the change, "raco setup -D" took 8m13s real, 13m52s
user; after the change, it takes 4m0s real, 9m3s user.
It's useful to look at the progress output, particularly the place that
a particular collection is scheduled on. Before, progress would stop on
the "macro-debugger" collection for a long time. Now, you can still see
individual places blocking for long periods of time by looking for long
runs where a place number is absent.
On my machine, the "images" collection is scheduled on place 0, and it
keeps 0 occupied for a long time---until around when setup hits
"scribblings". Then place 2 is occupied by "gui-debugger", then 1 is
occupied by "macro-debugger". CPUs utilization drops to around 75% when
it hits "gui-debugger" and then to around 50% at "macro-debugger". Both
of those collections depend on "images". It drops again, briefly, around
"scribble", which is also around when "images" finishes---I'm not sure
what that means. It also takes a while to climb back to around 100%, and
I'm not sure why that happens either (possibly related to
"scribble"/"scribblings"?).
It seems like it should help to issue more collections while those few
block, but doing it naively (-j 5 or -j 6) doesn't work.
Ryan
On 02/28/2012 11:22 AM, Robby Findler wrote:
On Tue, Feb 28, 2012 at 7:40 AM, Matthew Flatt<mfl...@cs.utah.edu> wrote:
At Tue, 28 Feb 2012 07:21:24 -0600, Robby Findler wrote:
Last I heard, Eli was saying that there was something seriously wrong
with 'raco setup' on two cores. Did that ever get resolved?
Commits 012ef60cd545ba and 534886dbe4b6ad (yesterday) were in response
and improved things on my machine, so it's probably worth checking again.
Here's what I get. Looks like we see improvements to 3 or so places
and then don't anymore. But there also doesn't seem to be any bad
behavior in there, at least for me (on dual quad-core 2.8 ghz xeon
processors).
time raco setup -Dj 1
[...]
real 17m26.143s
user 14m19.715s
sys 2m39.913s
time raco setup -Dj 2
[...]
real 9m16.022s
user 13m14.917s
sys 3m49.053s
time raco setup -Dj 3
[...]
real 7m57.370s
user 13m50.130s
sys 5m15.396s
time raco setup -Dj 4
[...]
real 7m19.843s
user 14m12.368s
sys 6m45.303s
time raco setup -Dj 5
[...]
real 7m12.761s
user 14m43.506s
sys 8m47.768s
time raco setup -Dj 6
[...]
real 7m16.931s
user 15m9.667s
sys 10m46.150s
time raco setup -Dj 7
[...]
real 7m29.394s
user 15m30.409s
sys 12m44.665s
time raco setup -Dj 8
[...]
real 7m29.394s
user 15m30.409s
sys 12m44.665s
Robby
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