lkml.org 
[lkml]   [2006]   [Nov]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: ZONE_NORMAL memory exhausted by 4000 TCP sockets
The latest update:
It seems that Linux kernel memory management mechanisms including
buddy and slab algorisms are not very efficient under my test
conditions that tcp stack requires a lot of (hundreds of MB) packet
buffers and release them very frequently.
Here is the proof. After change my kernel configuration to support
2/2 VM splition, LOMEM consumption reduced to 270M bytes compared with
640M bytes of the 1/3 kernel. All test conditions are the same and
memory pages allocated by TCP stack are also the same, 34K ~ 38K
pages. In other words, 'lost' memory changed from ~500M to ~130M.
Thus, I have nothing to do but guessing the much more free pages make
the slab/buddy algorisms more efficient and waste less memory.
Finally I got what I want. Thank you all for your help and advices.

Xiaoming.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-11-07 07:03    [W:0.028 / U:6.316 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site