12397
Comment:
|
13529
comparing performances of file vs. lvm with cache=off
|
Deletions are marked like this. | Additions are marked like this. |
Line 5: | Line 5: |
Future tests should continue to test hvm performance as they are obviously important for OS without Paravirtualized drivers, but also try to add to the picture the benefits of paravirtualized drivers (PV xen, virtio) and even PV CPU in the case of Xen. The kernel compilation tests should use kernbench instead of "make clean && make allnoconfig && time make" as it provide a statistical value. |
|
Line 10: | Line 6: |
Setup is the same as the tests from 22 Jul 2008 below. |
Setup is the same as the tests from 22 Jul 2008 below. Please note that unless specified otherwise, the VMs use a disk image on the host. |
Line 16: | Line 11: |
|| |||| '''Per Chr''' |||| '''Block''' |||| '''Rewrite''' || || '''platform''' ||'''KB/sec''' || '''%CPU''' || '''KB/sec''' || '''%CPU''' || '''KB/sec''' || '''%CPU''' || |
|| ||||<style="text-align: center;"> '''Per Chr''' ||||<style="text-align: center;"> '''Block''' ||||<style="text-align: center;"> '''Rewrite''' || || '''platform''' ||'''KB/sec''' || '''%CPU''' || '''KB/sec''' || '''%CPU''' || '''KB/sec''' || '''%CPU''' || |
Line 21: | Line 15: |
|| ''kvm-71 vm cache=on using lvm'' || 28147 || 70 ||27708 || 15 || 26988 || 13 || | |
Line 22: | Line 17: |
|| ''kvm-71 vm cache=off using lvm'' || 53492 || 93 || 60277 || 29 || 28931 || 12 || | |
Line 26: | Line 22: |
Line 28: | Line 23: |
|| |||| '''Per Chr''' |||| '''Block''' || |
|| ||||<style="text-align: center;"> '''Per Chr''' ||||<style="text-align: center;"> '''Block''' || |
Line 33: | Line 27: |
|| ''kvm-71 vm cache=on using lvm'' || 20684 || 70 || 65742 || 19 || | |
Line 34: | Line 29: |
|| ''kvm-71 vm cache=off using lvm'' || 23325 || 69 || 67107 || 18 || | |
Line 38: | Line 34: |
Line 40: | Line 35: |
|| |||| '''Seeks''' || |
|| ||||<style="text-align: center;"> '''Seeks''' || |
Line 45: | Line 39: |
|| ''kvm-71 vm cache=on using lvm'' || 198.8 || 1 || | |
Line 46: | Line 41: |
|| ''kvm-71 vm cache=off using lvm'' || 206.1 || 1 || | |
Line 50: | Line 46: |
Line 52: | Line 47: |
|| |||| '''Create''' |||| '''Read''' |||| '''Delete''' || |
|| ||||<style="text-align: center;"> '''Create''' ||||<style="text-align: center;"> '''Read''' ||||<style="text-align: center;"> '''Delete''' || |
Line 57: | Line 51: |
|| ''kvm-71 vm cache=on using lvm'' || 32588 || 99 || +++++ || +++ || +++++ || +++ || | |
Line 58: | Line 53: |
|| ''kvm-71 vm cache=off using lvm'' || 30843 || 96 || +++++ || +++ || +++++ || +++ || | |
Line 62: | Line 58: |
* '''Random Create''' (16 files) || |||| '''Create''' |||| '''Read''' |||| '''Delete''' || |
* '''Random Create''' (16 files) || ||||<style="text-align: center;"> '''Create''' ||||<style="text-align: center;"> '''Read''' ||||<style="text-align: center;"> '''Delete''' || |
Line 69: | Line 63: |
|| ''kvm-71 vm cache=on using lvm'' || +++++ || +++ || +++++ || +++ || +++++ || +++ || | |
Line 70: | Line 65: |
|| ''kvm-71 vm cache=off using lvm'' || +++++ || +++ || +++++ || +++ || +++++ || +++ || | |
Line 74: | Line 70: |
Line 76: | Line 71: |
Line 79: | Line 73: |
|| |||||| '''Sequential Output''' |||| '''Sequential Input''' || '''Seeks''' || | || ||||||<style="text-align: center;"> '''Sequential Output''' ||||<style="text-align: center;"> '''Sequential Input''' || '''Seeks''' || |
Line 83: | Line 77: |
|| ''kvm-71 vm cache=on using lvm'' || 54 || 47 || 92 || 34 || 97 || 94 || | |
Line 84: | Line 79: |
|| ''kvm-71 vm cache=off using lvm'' || 103 || 103 || 99 || 39 || 99 || 97 || | |
Line 88: | Line 84: |
Line 90: | Line 85: |
Line 94: | Line 87: |
Host is running Ubuntu Desktop 8.04 amd64, kernel 2.6.24-19-generic (when values are given for the host, it was started with mem=3072M) All the runs with the guests use the same image based on a basic install of ubuntu server 8.04 amd64, with 3072M and smp 2. Versions of the KVM module (manually compiled against host kernel) is either 70 or 71 (default is 71 when non specified)[[BR]] Version of Xen is 3.3 unstable retrieved from git (7 Jul 2008) |
Host is running Ubuntu Desktop 8.04 amd64, kernel 2.6.24-19-generic (when values are given for the host, it was started with mem=3072M) All the runs with the guests use the same image based on a basic install of ubuntu server 8.04 amd64, with 3072M and smp 2. . /!\ The VM image use a disk image on the host. It was reported to me that this severly impacts IO performances. Versions of the KVM module (manually compiled against host kernel) is either 70 or 71 (default is 71 when non specified)[[BR]] Version of Xen is 3.3 unstable retrieved from git (7 Jul 2008) |
Line 104: | Line 96: |
Line 106: | Line 97: |
Line 109: | Line 99: |
|| '''platform'''||'''Throughput in MB/sec''' || '''% of native''' || || ''host (native)''|| 544.403 || 100 || |
|| '''platform''' ||'''Throughput in MB/sec''' || '''% of native''' || || ''host (native)'' || 544.403 || 100 || |
Line 116: | Line 106: |
Line 118: | Line 107: |
Line 123: | Line 111: |
|| '''platform'''||'''Elapsed Time'' || '''System Time ''' || '''User Time''' || '''Percent CPU''' || '''Context Switches''' || '''Sleeps''' || '''Elapsed time /native''' || || ''host (native)'' || 54.214 (0.174442) || 93.348 (0.266964) || 10.634 (0.265104) || 191 (0.707107) || 17898.4 (65.9758) || 13341.8 (39.8522) || 1.00 || || ''kvm vm (kvm 70)'' || 84.664 (0.397781) || 107.48 (0.501348) || 53.692 (0.234883) || 190 (0.707107) || 15756.4 (66.4139) || 16633.6 (92.4868) || 1.56 || || ''kvm vm (kvm 71)'' || 84.158 (0.16769) || 107.826 (0.307782) || 52.924 (0.33894) || 190.6 (0.547723) || 15754 (50.2544) || 16518.6 (71.8213) || 1.57 || || ''kvm vm (kvm 72)'' || 86.678 (0.5205) || 108.982 (0.214056) || 54.302 (0.628387) || 188.2 (0.83666) || 15696.8 (49.8618) || 16619.8 (99.911) || 1.60 || || ''kvm virtio disk cache=on'' || 83.676 (0.461877) || 107.838 (0.766988) || 52.13 (1.02242) || 190.8 (0.447214) || 15650 (68.4142) || 16515.2 (107.183) || 1.54 || || ''kvm virtio disk cache=off'' || 89.41 (0.91169) || 110.73 (0.976627) || 57.85 (1.06104) || 188 (0.707107) || 16143.6 (55.9178) || 16746.2 (38.2583) || 1.65 || || ''xen hvm'' || 101.046 (6.3364) || 127.176 (5.13701) || 55.446 (1.5455) || 181.2 (16.331) || 17114.4 (613.934) || 16993.8 (388.987) || 1.86 || || ''xen pv'' || 62.812 (0.458443) || 94.474 (0.592182) || 20.082 (0.387001) || 182 (1.22474) || 9545.2 (39.6573) || 10872.2 (78.1326) || 1.12 || || ''xen dom0'' || 60.924 (0.43558) || 94.616 (0.261687) || 20.294 (0.282011) || 188.4 (1.34164) || 10330 (232.204) || 10976.2 (86.9897) || 1.12 || |
|| '''platform''' ||'''Elapsed Time'' ''''' || System Time ''' ''' || User Time''' ''' || Percent CPU''' ''' || Context Switches''' ''' || Sleeps''' ''' || Elapsed time /native''' ''' || || host (native)'' '' || 54.214 (0.174442) || 93.348 (0.266964) || 10.634 (0.265104) || 191 (0.707107) || 17898.4 (65.9758) || 13341.8 (39.8522) || 1.00 || || kvm vm (kvm 70)'' '' || 84.664 (0.397781) || 107.48 (0.501348) || 53.692 (0.234883) || 190 (0.707107) || 15756.4 (66.4139) || 16633.6 (92.4868) || 1.56 || || kvm vm (kvm 71)'' '' || 84.158 (0.16769) || 107.826 (0.307782) || 52.924 (0.33894) || 190.6 (0.547723) || 15754 (50.2544) || 16518.6 (71.8213) || 1.57 || || kvm vm (kvm 72)'' '' || 86.678 (0.5205) || 108.982 (0.214056) || 54.302 (0.628387) || 188.2 (0.83666) || 15696.8 (49.8618) || 16619.8 (99.911) || 1.60 || || kvm virtio disk cache=on'' '' || 83.676 (0.461877) || 107.838 (0.766988) || 52.13 (1.02242) || 190.8 (0.447214) || 15650 (68.4142) || 16515.2 (107.183) || 1.54 || || kvm virtio disk cache=off'' '' || 89.41 (0.91169) || 110.73 (0.976627) || 57.85 (1.06104) || 188 (0.707107) || 16143.6 (55.9178) || 16746.2 (38.2583) || 1.65 || || xen hvm'' '' || 101.046 (6.3364) || 127.176 (5.13701) || 55.446 (1.5455) || 181.2 (16.331) || 17114.4 (613.934) || 16993.8 (388.987) || 1.86 || || xen pv'' '' || 62.812 (0.458443) || 94.474 (0.592182) || 20.082 (0.387001) || 182 (1.22474) || 9545.2 (39.6573) || 10872.2 (78.1326) || 1.12 || || xen dom0'' '' || 60.924 (0.43558) || 94.616 (0.261687) || 20.294 (0.282011) || 188.4 (1.34164) || 10330 (232.204) || 10976.2 (86.9897) || 1.12 || |
Line 135: | Line 122: |
Line 137: | Line 123: |
Line 143: | Line 128: |
|| '''run''' || '''1''' || '''2''' || '''3''' || || '''real''' || 2m34 || 2m24 || 2m25 || || '''user''' || 1m23 || 1m22 || 1m22 || || '''sys''' || 1m0 || 1m0 || 1m1 || |
|| run''' ''' || 1''' ''' || 2''' ''' || 3''' ''' || || real''' ''' || 2m34 || 2m24 || 2m25 || || user''' ''' || 1m23 || 1m22 || 1m22 || || sys''' ''' || 1m0 || 1m0 || 1m1 || |
Line 152: | Line 135: |
|| '''run''' || '''1''' || '''2''' || '''3''' || || '''real''' || 2m12 || 2m13 || 2m12 || || '''user''' || 1m27 || 1m28 || 1m27 || || '''sys''' || 0m43 || 0m43 || 0m43 || |
|| run''' ''' || 1''' ''' || 2''' ''' || 3''' ''' || || real''' ''' || 2m12 || 2m13 || 2m12 || || user''' ''' || 1m27 || 1m28 || 1m27 || || sys''' ''' || 0m43 || 0m43 || 0m43 || |
Line 161: | Line 142: |
|| '''real''' || 1m31 || || '''user''' || 1m11 || || '''sys''' || 0m10 || |
|| real''' ''' || 1m31 || || user''' ''' || 1m11 || || sys''' ''' || 0m10 || |
Line 169: | Line 148: |
Line 175: | Line 153: |
|| '''run''' || '''1''' || '''2''' || '''3''' || || '''real''' || 2m28 || 2m17 || 2m16 || || '''user''' || 1m27 || 1m27 || 1m27 || || '''sys''' || 0m51 || 0m49 || 0m49 || |
|| run''' ''' || 1''' ''' || 2''' ''' || 3''' ''' || || real''' ''' || 2m28 || 2m17 || 2m16 || || user''' ''' || 1m27 || 1m27 || 1m27 || || sys''' ''' || 0m51 || 0m49 || 0m49 || |
Line 182: | Line 158: |
|| '''run''' || '''1''' || '''2''' || '''3''' || || '''real''' || 2m31 || 2m29 || 2m29 || || '''user''' || 1m36 || 1m36 || 1m36 || || '''sys''' || 0m52 || 0m53 || 0m52 || |
|| run''' ''' || 1''' ''' || 2''' ''' || 3''' ''' || || real''' ''' || 2m31 || 2m29 || 2m29 || || user''' ''' || 1m36 || 1m36 || 1m36 || || sys''' ''' || 0m52 || 0m53 || 0m52 || |
Line 189: | Line 163: |
Line 195: | Line 168: |
Line 199: | Line 171: |
|| '''run''' || '''1''' || '''2''' || '''3''' || || '''real''' || 2m26 || 2m19 || 2m20 || || '''user''' ||1m21 || 1m22 || 1m21 || || '''sys''' || 1m02 || 0m58 || 1m00 || |
|| run''' ''' || 1''' ''' || 2''' ''' || 3''' ''' || || real''' ''' || 2m26 || 2m19 || 2m20 || || user''' ''' ||1m21 || 1m22 || 1m21 || || sys''' ''' || 1m02 || 0m58 || 1m00 || |
Line 206: | Line 176: |
|| '''run''' || '''1''' || '''2''' || '''3''' || || '''real''' || 2m11 || 2m07 || 2m07 || || '''user''' || 1m26 || 1m26 || 1m26 || || '''sys''' || 0m45 || 0m40 || 0m40 || |
|| run''' ''' || 1''' ''' || 2''' ''' || 3''' ''' || || real''' ''' || 2m11 || 2m07 || 2m07 || || user''' ''' || 1m26 || 1m26 || 1m26 || || sys''' ''' || 0m45 || 0m40 || 0m40 || |
Line 213: | Line 181: |
Line 217: | Line 184: |
|| '''run''' || '''1''' || '''2''' || '''3''' || || '''real''' || 1m34 || 1m33 || 1m33 || || '''user''' || 1m17 || 1m18 || 1m18 || || '''sys''' || 0m15 || 0m15 || 0m15 || |
|| run''' ''' || 1''' ''' || 2''' ''' || 3''' ''' || || real''' ''' || 1m34 || 1m33 || 1m33 || || user''' ''' || 1m17 || 1m18 || 1m18 || || sys''' ''' || 0m15 || 0m15 || 0m15 || |
Line 224: | Line 189: |
Line 229: | Line 193: |
Line 233: | Line 196: |
|| '''platform'''||'''time in seconds'''|| || '''Xen''' || 23 || || '''KVM''' || 20 || |
|| platform'''''' ||time in seconds'''''' || || Xen''' ''' || 23 || || KVM''' ''' || 20 || |
Line 239: | Line 200: |
Line 243: | Line 203: |
|| '''platform'''||'''real time'''||'''user time'''||'''sys time'''|| || '''Xen''' || 1m53 || 1m06 || 0m43 || || '''KVM''' || 1m03 || 1m06 || 0m33 || |
|| platform'''''' ||real time'''''' ||user time'''''' ||sys time'''''' || || Xen''' ''' || 1m53 || 1m06 || 0m43 || || KVM''' ''' || 1m03 || 1m06 || 0m33 || |
Line 249: | Line 207: |
|| '''platform'''||'''real time'''||'''user time'''||'''sys time'''|| || '''Xen''' || 1m52 || 1m07 || 0m43 || || '''KVM''' || 0m56 || 1m07 || 0m31 || |
|| platform'''''' ||real time'''''' ||user time'''''' ||sys time'''''' || || Xen''' ''' || 1m52 || 1m07 || 0m43 || || KVM''' ''' || 0m56 || 1m07 || 0m31 || |
While benchmarks are a very difficult exercice and as such the results must be considered carefully, they are still interesting to compare the respective performance between the solutions for different workloads.
This page will try to keep an eye on the relative performance of Xen and KVM. Until 2.6.25, virtio was not part of the mainstream linux kernel, so the tests compared performance of HVM systems (the guest system was an "unmodified OS").
29 Jul 2008
Setup is the same as the tests from 22 Jul 2008 below. Please note that unless specified otherwise, the VMs use a disk image on the host.
Test consist of a single run of bonnie++ v1.03b (default package from ubuntu 8.04).
Sequential Output (Size is 6GB)
|
Per Chr |
Block |
Rewrite |
|||
platform |
KB/sec |
%CPU |
KB/sec |
%CPU |
KB/sec |
%CPU |
host (native) |
52149 |
87 |
58412 |
40 |
29247 |
13 |
kvm-71 vm cache=on |
23666 |
63 |
23968 |
12 |
17436 |
9 |
kvm-71 vm cache=on using lvm |
28147 |
70 |
27708 |
15 |
26988 |
13 |
kvm-71 vm cache=off |
41046 |
82 |
43866 |
21 |
20055 |
8 |
kvm-71 vm cache=off using lvm |
53492 |
93 |
60277 |
29 |
28931 |
12 |
kvm virtio disk cache=on |
24138 |
66 |
24698 |
13 |
17989 |
11 |
kvm virtio disk cache=off |
42277 |
83 |
45366 |
24 |
20605 |
9 |
xen hvm |
19245 |
28 |
20700 |
3 |
17973 |
4 |
xen pv |
19078 |
28 |
20364 |
3 |
18698 |
4 |
Sequential Input (Size is 6GB)
|
Per Chr |
Block |
||
platform |
KB/sec |
%CPU |
KB/sec |
%CPU |
host (native) |
59967 |
89 |
67919 |
11 |
kvm-71 vm cache=on |
23993 |
69 |
37927 |
10 |
kvm-71 vm cache=on using lvm |
20684 |
70 |
65742 |
19 |
kvm-71 vm cache=off |
21059 |
63 |
43648 |
12 |
kvm-71 vm cache=off using lvm |
23325 |
69 |
67107 |
18 |
kvm virtio disk cache=on |
25058 |
78 |
37872 |
10 |
kvm virtio disk cache=off |
25090 |
74 |
41338 |
10 |
xen hvm |
38117 |
45 |
44853 |
10 |
xen pv |
38087 |
44 |
44091 |
9 |
random (Size is 6GB)
|
Seeks |
|
platform |
/sec |
%CPU |
host (native) |
211.9 |
1 |
kvm-71 vm cache=on |
171.2 |
0 |
kvm-71 vm cache=on using lvm |
198.8 |
1 |
kvm-71 vm cache=off |
202.7 |
0 |
kvm-71 vm cache=off using lvm |
206.1 |
1 |
kvm virtio disk cache=on |
182.5 |
1 |
kvm virtio disk cache=off |
224.4 |
1 |
xen hvm |
150.1 |
0 |
xen pv |
147.0 |
0 |
Sequential Create (16 files)
|
Create |
Read |
Delete |
|||
platform |
/sec |
%CPU |
/sec |
%CPU |
/sec |
%CPU |
host (native) |
+++++ |
+++ |
+++++ |
+++ |
+++++ |
+++ |
kvm-71 vm cache=on |
+++++ |
+++ |
+++++ |
+++ |
+++++ |
+++ |
kvm-71 vm cache=on using lvm |
32588 |
99 |
+++++ |
+++ |
+++++ |
+++ |
kvm-71 vm cache=off |
31645 |
94 |
+++++ |
+++ |
+++++ |
+++ |
kvm-71 vm cache=off using lvm |
30843 |
96 |
+++++ |
+++ |
+++++ |
+++ |
kvm virtio disk cache=on |
+++++ |
+++ |
+++++ |
+++ |
+++++ |
+++ |
kvm virtio disk cache=off |
+++++ |
+++ |
+++++ |
+++ |
+++++ |
+++ |
xen hvm |
+++++ |
+++ |
+++++ |
+++ |
+++++ |
+++ |
xen pv |
+++++ |
+++ |
+++++ |
+++ |
+++++ |
+++ |
Random Create (16 files)
|
Create |
Read |
Delete |
|||
platform |
/sec |
%CPU |
/sec |
%CPU |
/sec |
%CPU |
host (native) |
+++++ |
+++ |
+++++ |
+++ |
+++++ |
+++ |
kvm-71 vm cache=on |
+++++ |
+++ |
+++++ |
+++ |
+++++ |
+++ |
kvm-71 vm cache=on using lvm |
+++++ |
+++ |
+++++ |
+++ |
+++++ |
+++ |
kvm-71 vm cache=off |
+++++ |
+++ |
+++++ |
+++ |
+++++ |
+++ |
kvm-71 vm cache=off using lvm |
+++++ |
+++ |
+++++ |
+++ |
+++++ |
+++ |
kvm virtio disk cache=on |
31648 |
90 |
+++++ |
+++ |
+++++ |
+++ |
kvm virtio disk cache=off |
+++++ |
+++ |
+++++ |
+++ |
+++++ |
+++ |
xen hvm |
+++++ |
+++ |
+++++ |
+++ |
+++++ |
+++ |
xen pv |
+++++ |
+++ |
+++++ |
+++ |
+++++ |
+++ |
comparison to native
(normalised against native performances, rounded to nearest)
|
Sequential Output |
Sequential Input |
Seeks |
|||
platform |
Per Chr |
Block |
Rewrite |
Per Chr |
Block |
/sec |
host (native) |
100 |
100 |
100 |
100 |
100 |
100 |
kvm-71 vm cache=on |
45 |
41 |
60 |
40 |
56 |
81 |
kvm-71 vm cache=on using lvm |
54 |
47 |
92 |
34 |
97 |
94 |
kvm-71 vm cache=off |
79 |
75 |
69 |
35 |
64 |
96 |
kvm-71 vm cache=off using lvm |
103 |
103 |
99 |
39 |
99 |
97 |
kvm virtio disk cache=on |
46 |
42 |
62 |
42 |
56 |
86 |
kvm virtio disk cache=off |
81 |
78 |
70 |
42 |
61 |
106 |
xen hvm |
37 |
35 |
61 |
64 |
66 |
71 |
xen pv |
37 |
35 |
64 |
64 |
65 |
70 |
22 Jul 2008
All tests where realised on the same system: AMD X2 4400+/4GB RAM/sata drive.
Host is running Ubuntu Desktop 8.04 amd64, kernel 2.6.24-19-generic (when values are given for the host, it was started with mem=3072M) All the runs with the guests use the same image based on a basic install of ubuntu server 8.04 amd64, with 3072M and smp 2.
The VM image use a disk image on the host. It was reported to me that this severly impacts IO performances.
Versions of the KVM module (manually compiled against host kernel) is either 70 or 71 (default is 71 when non specified)BR Version of Xen is 3.3 unstable retrieved from git (7 Jul 2008)
kvm hvm |
kernel 2.6.24-16-server |
kvm hvm virtio |
same as above, booted using -drive file=<image>,if=virtio,boot=on (initrd contains modules virtio_pci, virtio_blk) |
xen hvm |
kernel 2.6.24-16-server, same as kvm hvm above |
xen pv |
kernel 2.6.18.8-xen (same as Dom0), same image as all vm above |
dbench 3.04
The best of 2 runs for dbench 10
platform |
Throughput in MB/sec |
% of native |
host (native) |
544.403 |
100 |
kvm vm |
543.041 |
100 |
kvm virtio disk cache=on |
567.623 |
104 |
kvm virtio disk cache=off |
574.813 |
106 |
xen hvm |
522.167 |
96 |
xen pv |
365.44 |
67 |
kernbench 0.42
One run of kernbench -M (available memory being below 4GB)
Results present time in s at load -j 8 with standard deviation being in parenthesis
platform |
Elapsed Time |
System Time |
User Time |
Percent CPU |
Context Switches |
Sleeps |
Elapsed time /native |
host (native) |
54.214 (0.174442) |
93.348 (0.266964) |
10.634 (0.265104) |
191 (0.707107) |
17898.4 (65.9758) |
13341.8 (39.8522) |
1.00 |
kvm vm (kvm 70) |
84.664 (0.397781) |
107.48 (0.501348) |
53.692 (0.234883) |
190 (0.707107) |
15756.4 (66.4139) |
16633.6 (92.4868) |
1.56 |
kvm vm (kvm 71) |
84.158 (0.16769) |
107.826 (0.307782) |
52.924 (0.33894) |
190.6 (0.547723) |
15754 (50.2544) |
16518.6 (71.8213) |
1.57 |
kvm vm (kvm 72) |
86.678 (0.5205) |
108.982 (0.214056) |
54.302 (0.628387) |
188.2 (0.83666) |
15696.8 (49.8618) |
16619.8 (99.911) |
1.60 |
kvm virtio disk cache=on |
83.676 (0.461877) |
107.838 (0.766988) |
52.13 (1.02242) |
190.8 (0.447214) |
15650 (68.4142) |
16515.2 (107.183) |
1.54 |
kvm virtio disk cache=off |
89.41 (0.91169) |
110.73 (0.976627) |
57.85 (1.06104) |
188 (0.707107) |
16143.6 (55.9178) |
16746.2 (38.2583) |
1.65 |
xen hvm |
101.046 (6.3364) |
127.176 (5.13701) |
55.446 (1.5455) |
181.2 (16.331) |
17114.4 (613.934) |
16993.8 (388.987) |
1.86 |
xen pv |
62.812 (0.458443) |
94.474 (0.592182) |
20.082 (0.387001) |
182 (1.22474) |
9545.2 (39.6573) |
10872.2 (78.1326) |
1.12 |
xen dom0 |
60.924 (0.43558) |
94.616 (0.261687) |
20.294 (0.282011) |
188.4 (1.34164) |
10330 (232.204) |
10976.2 (86.9897) |
1.12 |
13 Feb 2008
Intel system
Tests on an Intel based system with an Intel Core2 2Ghz and 2GB RAM. The test VM for both Xen and KVM is the same image: an unmodified Debian Lenny kernel 2.6.22 amd64 w/512 MB RAM
The test is still the "make clean && make allnoconfig && time make" of a 2.6.24 kernel
- Host is an opensource Xen-3.2 (from xen.org) with a Dom0 running a kernel-2.6.18.8-xen, Dom0 userspace is a 64bits Ubuntu Feisty
run |
1 |
2 |
3 |
real |
2m34 |
2m24 |
2m25 |
user |
1m23 |
1m22 |
1m22 |
sys |
1m0 |
1m0 |
1m1 |
dbench 10: 243 MB/s
- Host is a Ubuntu feisty amd64 kernel 2.6.20 and KVM 60
run |
1 |
2 |
3 |
real |
2m12 |
2m13 |
2m12 |
user |
1m27 |
1m28 |
1m27 |
sys |
0m43 |
0m43 |
0m43 |
dbench 10: 255 MB/s
- Result on host Ubuntu feisty amd64 kernel 2.6.20 (not in a VM)
real |
1m31 |
user |
1m11 |
sys |
0m10 |
dbench 10: 505 MB/s
AMD system
Tests on an AMD based system with an AMD X2 4400+ and 4GB RAM. The test VM for both Xen and KVM is the same image: an unmodified Debian Lenny kernel 2.6.22 amd64 w/512 MB RAM
The test is still the "make clean && make allnoconfig && time make" of a 2.6.24 kernel
- Host is an opensource Xen-3.2 (from xen.org) with a Dom0 running a kernel-2.6.18-xen, Dom0 userspace is a 64bits Ubuntu Gutsy
run |
1 |
2 |
3 |
real |
2m28 |
2m17 |
2m16 |
user |
1m27 |
1m27 |
1m27 |
sys |
0m51 |
0m49 |
0m49 |
- Host in Ubuntu gutsy amd64 kernel 2.6.22-14-generic with KVM 60
run |
1 |
2 |
3 |
real |
2m31 |
2m29 |
2m29 |
user |
1m36 |
1m36 |
1m36 |
sys |
0m52 |
0m53 |
0m52 |
12 Feb 2008
Thanks for Dan Berrange who pointed me on xen.org instead of xensource.com as a source of download for the latest Xen.
The tests consists of the compilation of a linux kernel 2.6.24 with allnoconfig (make allnoconfig && time make). The host hardware is a 1.86Ghz Intel Core2duo.
unmodified VM: 64bits Debian Etch
The first two tests run the same Virtual Machine with an unmodified 64bits Debian Etch.
- Host is an opensource Xen-3.2 (from xen.org) with a Dom0 running a kernel-2.6.18-xen, Dom0 userspace is a 64bits Debian Lenny
run |
1 |
2 |
3 |
real |
2m26 |
2m19 |
2m20 |
user |
1m21 |
1m22 |
1m21 |
sys |
1m02 |
0m58 |
1m00 |
- Host is a 64bits Debian Lenny with a 2.6.24 kernel and KVM-60
run |
1 |
2 |
3 |
real |
2m11 |
2m07 |
2m07 |
user |
1m26 |
1m26 |
1m26 |
sys |
0m45 |
0m40 |
0m40 |
paravirtualised VM: 64bits Debian Etch with xenified kernel
The following test runs on the same hardware than the previous one. The kernel used in the DomU is the same as in Dom0:
- Host is an opensource Xen 3.2 (from xen.org) with a Dom0 running a kernel-2.6.18-xen, Dom0 userspace is a 64bits Debian Lenny
run |
1 |
2 |
3 |
real |
1m34 |
1m33 |
1m33 |
user |
1m17 |
1m18 |
1m18 |
sys |
0m15 |
0m15 |
0m15 |
11 Feb 2008
For the following 2 tests, the system is an Intel core 2 duo 2.4Ghz w/ 2GB RAM running the latest available versions:
- for Xen: opensource Xen 3.1.0 (from xen.xensource.com) + Dom0 kernel based on kernel.org 2.6.18
- for KVM: kvm-60 on a 2.6.23
The guest used in both case is the exact same VM (non-paravirtualised 64 bit Debian etch with 256 MB RAM).
Guest system boot-up time
platform |
time in seconds |
Xen |
23 |
KVM |
20 |
Kernel compilation benchmark
Time to compile a 2.6.24 allnoconfig
- first try - cold cache
platform |
real time |
user time |
sys time |
Xen |
1m53 |
1m06 |
0m43 |
KVM |
1m03 |
1m06 |
0m33 |
- second try - w/ cache
platform |
real time |
user time |
sys time |
Xen |
1m52 |
1m07 |
0m43 |
KVM |
0m56 |
1m07 |
0m31 |