Thank you for your comment. ( -> Isaku Yamahata)
Isaku Yamahata wrote:----------------------
Sent: 2007年1月23日 22:29:47 +0900
Subject: Re: [Xen-ia64-devel] [PATCH] Add netfornt tx_queue_len
>
> The patch modifis common-code, not ia64 specific.
> You should send it to xen-devel with Cc to xen-ia64-devel.
>
----------------------------------------------
Hi all.
When I executed "netperf" by a short message of UDP, 
PV domain and PV-on-HVM driver issued Call trace.
I think that GrantEntry was filled with a lot of messages processings.
This problem is generated in IA64 only.
Probably, I think that I am the following problems. 
 In IA64
 NET_TX_RING_SIZE 1024, NR_GRANT_ENTRIES 2048
 In x86
 NET_TX_RING_SIZE 256, NR_GRANT_ENTRIES 2048
I corrected to check "number of unprocessing queue > tx_queue_len" before Grant 
was filled.
However, my correction influences x86. 
Please teach to me in that when there is a better improvement. 
--------------------
# ./netperf -t UDP_STREAM -H 10.34.179.101 -l 3 -- -m 10 -M 10
netperf[2474]: bugcheck! 0 [1]
Modules linked in:
Pid: 2474, CPU 0, comm: netperf
psr : 00001010081a2010 ifs : 8000000000000b9b ip : [<a0000001006c9ce0>] Not 
tainted
ip is at network_start_xmit+0xa00/0xe40
unat: 0000000000000000 pfs : 8000000000000b9b rsc : 000000000000000b
rnat: 0000000000000000 bsps: 0000000000000000 pr : 0104682415669999
ldrs: 0000000000000000 ccv : 0000000000000000 fpsr: 0009804c8a70033f
csd : 0000000000000000 ssd : 0000000000000000
--------------------
Best regards,
Tomonari Horikoshi

Attachment: tx-queue-len-support.patch
Description: Binary data

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