Re: svn to git, N-squared?

On 6/12/06, Linus Torvalds [off-list ref] wrote:

On Mon, 12 Jun 2006, Jon Smirl wrote:

quoted

I've stablized like this. 1GB RAM with 2.8Ghz P4 hyperthread. Is there
anyway to tell what it is doing in the kernel for so much time?

oprofile will tell you.

I don't see why it would spend a lot of time in the kernel, unless it's
the SVN part that does a ton of reads or something. git should have almost
no kernel footprint apart from the individual objects creation/reading, so
once it's repacked, I generally see very little system time.

What does top say? (Ie can you see _which_ process spends time in the
kernel?)

top - 11:54:32 up 4 days,  1:27,  5 users,  load average: 1.85, 1.74, 1.55
Tasks: 135 total,   2 running, 133 sleeping,   0 stopped,   0 zombie
Cpu(s): 14.7% us, 35.3% sy,  0.0% ni, 49.3% id,  0.0% wa,  0.2% hi,  0.5% si,  0
Mem:   1035740k total,  1020836k used,    14904k free,    18368k buffers
Swap: 118222276k total,   645124k used, 117577152k free,   183172k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
14525 jonsmirl  16   0  604m 391m 1904 S   24 38.7 916:53.39 git-svnimport
20947 jonsmirl  17   0     0    0    0 R    1  0.0   0:00.03 git-svnimport
20864 jonsmirl  16   0  2120 1024  788 R    1  0.1   0:00.08 top
 2436 root      15   0 71184  28m 6100 S    0  2.8 119:13.55 Xorg
    1 root      16   0  1992  340  312 S    0  0.0   0:00.79 init
    2 root      RT   0     0    0    0 S    0  0.0   0:00.00 migration/0
    3 root      34  19     0    0    0 S    0  0.0   0:01.42 ksoftirqd/0
    4 root      RT   0     0    0    0 S    0  0.0   0:00.00 watchdog/0


-- 
Jon Smirl
jonsmirl@gmail.com