[linux-mm-cc] kernel make benchmark on small x86 desktop

Nai Xia nai.xia at gmail.com
Mon Apr 14 02:38:41 EDT 2008


Hi, Nitin,

Unfortunately, this result is negative.

I limited the RAM memory to 56M, after that the kernel compling test was done:

# time make -j4 bzImage >/dev/null 2>&1

the result without compcache:
real    125m57.405s
user    19m28.617s
sys     2m41.942s

the result with default loaded compcache:
real    153m35.538s
user    19m45.838s
sys     4m2.727s


I personally think this give us the information when some "stale"
anonymous pages get "pinned" in memory for a long time, it is bad  for
overal performance.
This will never happen in fillmem benchmark, because it travels the
memory back and forth,
the possibility of visiting each page is equal.

How do you think ?

Best Regards,
Nai


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