On Mon, 1 Jul 2002, Matthew Dillon wrote: > SMP builds are still producing panics every 2-4 buildworlds after the > KSE commit, I'm still trying to track that down. But I was able to > complete the softupdates/non-softupdates test with a UP build of > -current: > > with softupdates (UP BUILD, CURRENT): > 3122.30 real 2360.70 user 532.54 sys > 3083.17 real 2361.14 user 529.53 sys > 3085.05 real 2361.59 user 529.32 sys > > without softupdates (UP BUILD, CURRENT): > 3361.70 real 2365.23 user 535.50 sys > 3451.55 real 2368.22 user 537.26 sys > 3454.85 real 2369.42 user 536.69 sys > ^^^^^ > ~350 second dif note user times > for real.
> My conclusion is that softupdates is working fine and (A) the new GCC > is a whole lot less efficient then the old GCC and (B) user times are > masking gains (due to high parallelism) that would otherwise be > realized with softupdates. This seems like the right diagnosis. The new gcc is very well pessimized. A 60% increase in user times is normal :-(. Your increase of almost 70% seems a little high. I guess this is because the user times are not quite directly comparable. SMP can easily increase user time by causing more cache misses... > : (original tests under -stable) > :test1# cat x1 (SMP BUILD, STABLE, WITH SOFTUPDATES) > : 1497.09 real 1397.98 user 612.06 sys > : 1500.12 real 1399.33 user 609.79 sys > : 1494.82 real 1398.30 user 612.46 sys > :test1# cat x2 (SMP BUILD, STABLE, WITHOUT SOFTUPDATES) > : 2449.14 real 1401.34 user 625.54 sys > : 2389.75 real 1400.38 user 629.86 sys > : 2358.82 real 1403.26 user 624.93 sys > : > ( ~889 second difference in real time) Bruce To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
