Bugs item #2723366, was opened at 2009-03-31 07:00
Message generated for change (Tracker Item Submitted) made by jiajun
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Category: qemu
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Jiajun Xu (jiajun)
Assigned to: Nobody/Anonymous (nobody)
Summary: ltp diotest running time is 2.54 times than before
Initial Comment:
Running LTP diotest in guest costs about 2m22s in latest commit which it needs
0m56s in older commit.
New kvm kernel commit:a317a1e496b22d1520218ecf16a02498b99645e2
kvm user-space commit: df0e52a8d988d55dd42f8d46faffa9faa41892c9
ltp diotest running time: 5 rounds of diotest average time: 2m22s
Old kvm kernel commit:e74bb3fa8e55284dc6fdd68aa9da833ce07a4295
kvm user-space commit: 4c1083fd610fba4eedb45553c0a579b7b6593f1a
ltp diotest running time: 5 rounds of diotest average time: 0m56s
Reproduce steps:
(1)qemu-system-x86_64 -m 512 -smp 4 -net
nic,macaddr=00:16:3e:12:0d:3c,model=rtl8139 -net tap,script=/etc/kvm/qemu-ifup
-hda /share/xvs/var/ia32e_rhel4u1.img
(2)Get LTP package from sourceforge and install it in guest
(3)Run diotest for 5 times.
while [ $i -lt 5 ]
do
time /ltp-full-20070930/runltp -l /tmp/ltp_dio.log -f dio -p -q >>
/root/ltp.log
((i++))
done
Notes:
The data is running with ltp-full-20070930, and we also tried latest ltp
package ltp-full-20090228, which can get similar data.
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