2.4.10-ac1-Preempt-kernel-1

2.4.10-ac1-Preempt-kernel-1

[Thomas Zimmerman]

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Just for fun:
$cd /usr/src/linux [2.4.10-ac1+netrand+preempt+reempt-stats]
$cat /proc/latencytimes
[snip empty report]
$make -j dep
[snip long make]
$cat /proc/latencytimes
Worst 20 latency times of 2604 measured in this period.
  usec      cause     mask   start line/file      address   end line/fil
e
 25673   reacqBKL        1  1374/sched.c         c0113219   696/sched.c
 22718  spin_lock        1   547/sched.c         c0111644   696/sched.c
 10238  spin_lock        1   547/sched.c         c0111644   303/namei.c
  7599      timer        5    76/softirq.c       c011a437   119/softirq.
c
  6832  spin_lock        0   547/sched.c         c0111644   280/time.c
  6731  spin_lock        1   708/open.c          c01370c8   757/open.c
  6174        BKL        0    59/ioctl.c         c0148204   121/ioctl.c
  6097       ide0        0   585/irq.c           c01084ef   647/irq.c
  4753        BKL        1  1462/inode.c         c0178979  1470/inode.c
  4008        BKL        1  1462/inode.c         c0178979   143/attr.c
  3961  spin_lock        0   547/sched.c         c0111644   647/irq.c
  3791   reacqBKL        0  1374/sched.c         c0113219  1378/sched.c
  3753        BKL        0  2687/buffer.c        c013cbe6   696/sched.c
  3519  spin_lock        0   547/sched.c         c0111644   133/file_tab
le.c
  2925  spin_lock        0  1308/audio.c         c01e5c0b  1319/audio.c
  1990  spin_lock        0   547/sched.c         c0111644   172/select.c
  1793  spin_lock        0   547/sched.c         c0111644   700/namei.c
  1500        BKL        0   301/namei.c         c0143757   133/file_tab
le.c
  1387        BKL        0   837/inode.c         c01776d3   647/irq.c
  1208   reacqBKL        0  1374/sched.c         c0113219  1470/inode.c
qubes@darklands:/usr/src/linux>
-------------
For full disclosure: I use the binary only nvidia driver and have vmware2.x
modules loaded (but unused yet). This is in X with kde loaded, gkrellm
running (reported ~280 procs at height of make), xmms running. Only one skip
in play back, and the mouse jumped a bit sometimes. :)

Now, it's off to build a kernel w/o the stats, to see it that changes
anything....and it does. The sound didn't skip this time, and the proc load
"only" got upto ~200. 

This is a AMD Athlon 800 w/512 Meg ram, ext3 root, reiserfs /usr on sw raid0 
over two sw raid1s. 

Thomas

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