Messages in this thread | | | Date | Tue, 7 Nov 2006 14:00:00 +0800 | From | "Zhao Xiaoming" <> | Subject | Re: ZONE_NORMAL memory exhausted by 4000 TCP sockets |
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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/
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