Bug 713063

Summary: rtl8139:Execute multiple netperf clients caused system call interrupted
Product: Red Hat Enterprise Linux 5 Reporter: YangFeng <fyang>
Component: kvmAssignee: jason wang <jasowang>
Status: CLOSED NOTABUG QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: medium    
Version: 5.7CC: juzhang, michen, mkenneth, rhod, shuang, virt-maint
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
: 716371 (view as bug list) Environment:
Last Closed: 2011-10-25 07:59:56 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---
Bug Depends On:    
Bug Blocks: 580948, 716371    

Description YangFeng 2011-06-14 06:40:51 UTC
Description of problem:
When I run multiple netperf clients on host, they connect with the
netperf-server in guest.
clients fail to execute cmds and output "interrupted system call"

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. boot up a guest with rtl8139
2. setup and launch netperf server in guest
guest)# ./netserver
3. setup and launch multiple netperf client in host.
host)# while true;do ./netperf -t TCP_STREAM -H $guest_ip ;echo Tcp:$?;done &
host)# while true;do ./netperf -t UDP_STREAM -H $guest_ip;echo Udp:$?;done &
host)# while true;do ./netperf -H $guest_ip -- -m 200; echo $? Other:$?;done &
Actual results:
netperf clients outputted:
interrupted system call 
netperf remote error 4

Expected results:
netperf commands completed. 

Additional info:

Comment 1 Ronen Hod 2011-06-21 17:37:31 UTC
is it related to https://bugzilla.redhat.com/show_bug.cgi?id=704097?

Comment 2 jason wang 2011-06-22 02:44:04 UTC
(In reply to comment #1)
> Jason,
> is it related to https://bugzilla.redhat.com/show_bug.cgi?id=704097?

Yes, looks related. 8193 also lacks the check of buffer availability before receiving packets. I can try this.

Comment 3 YangFeng 2011-06-24 06:11:12 UTC
In step 1, I start guest with 4 nics.
In step 3, launch 4 netperf client in host.  one netperf client per guest nic.

Comment 5 Ronen Hod 2011-07-31 13:38:51 UTC
If the backport doesn't solve the problem, then we will reconsider the dev-ack+.
Thanks, Ronen.