Thread (39 messages) 39 messages, 8 authors, 2008-08-28

Re: cat /proc/net/tcp takes 0.5 seconds on x86_64

From: Herbert Xu <herbert@gondor.apana.org.au>
Date: 2008-08-27 04:19:37

Hans de Goede [off-list ref] wrote:
Eric Dumazet wrote:
quoted
# dmesg | grep "TCP established hash"
TCP established hash table entries: 262144 (order: 10, 4194304 bytes)
# time cat /proc/net/tcp >/dev/null

real    0m0.091s
user    0m0.001s
sys     0m0.090s
As quoted above my idle x86_64, using the exact same hash table size, running 
2.6.27-rc2.git1 uses 0.520 seconds for that same command, thats a difference of 
more then a factor 50 !!
That looks like a factor of 5 to me, not 50.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} [off-list ref]
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help