On Mon, Jun 11, 2012 at 1:41 PM, Konstantin Belousov <kostikbel_at_gmail.com> wrote: > On Mon, Jun 11, 2012 at 01:23:03PM -0500, Alan Cox wrote: >> On Sat, Jun 9, 2012 at 9:26 PM, Garrett Cooper <yanegomi_at_gmail.com> wrote: >> >> > I build out of my UFS-only VM in VMware Fusion from time to time, >> > and it looks like there's a large chunk of processes that are swapped out >> > when doing two parallel builds: >> > >> > last pid: 27644; load averages: 2.43, 0.94, 0.98 >> > >> > up 1+15:06:06 19:20:48 >> > 79 processes: 4 running, 75 sleeping >> > CPU: 77.3% user, 0.0% nice, 22.7% system, 0.0% interrupt, 0.0% idle >> > Mem: 407M Active, 186M Inact, 208M Wired, 24M Cache, 110M Buf, 145M Free >> > Swap: 1024M Total, 267M Used, 757M Free, 26% Inuse >> > >> > I know that some minor changes have gone in in the past couple >> > months to change when swapping and page ins/outs would occur, but I was >> > wondering if this behavior was intended; I'm finding it a bit bizarre that >> > there's ~150MB free, ~180MB inactive, and 267MB swapped out as previous >> > experience has dictated that swap is basically untouched except in extreme >> > circumstances. >> > >> >> I can't think of any change in the past couple months that would have this >> effect. Specifically, I don't recall there having been any change that >> would make the page daemon more (or less aggressive) in laundering dirty >> pages. >> >> Keep in mind that gcc at higher optimization levels can and will use a lot >> of memory, i.e., hundreds of megabytes. > The new jemalloc in debugging mode uses much more anonymous memory now. > And since typical compiler process is relatively short-lived, the picture > posted probably related to some memory hog recently finished a run. Good point -- that was another thing that crossed my mind (even though it stayed that way for quite a while).. I'll try the compile with MALLOC_PRODUCTION to see if the behavior differs quite a bit. Thanks! -GarrettReceived on Mon Jun 11 2012 - 20:07:21 UTC
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