HI !
here are some preliminary benchmarks of lguest vs host (2.6.21)
Most results seem resonable - the file create/delete is a bit
strange - does anybody have an idea why 0k file create/delete could
be so much faster under lguest and 10k file so much slower ?
The only really serious problem with lguest performance seems to be
mmap latency, page-faults and protection faults.
the only problem that lmbench had was to calculate the cpu speed under
lguest (had to pass that on the commandline).
the sometimes better results of lguest compared to the host can also be
due to the better locality as lguest was only using 32MB total (host
idle).
hofrat
Host:
HW: AMD Duron 1.6GHz 256MB RAM HZ=250
distribution; Slackware 11.0 (ext3 80GB)
Lguest:
lguest-2.6.21-254.patch HZ=250
cmdline: Documentation/lguest/lguest 32m vmlinux --block=../slackfs root=/dev/lgba ro
distribution: Slackeare 11.0 minimum instalation (ext3 1GB)
(lguest was not using the network)
L M B E N C H 3 . 0 S U M M A R Y
------------------------------------
(Alpha software, do not distribute)
Basic system parameters
------------------------------------------------------------------------------
Host OS Description Mhz tlb cache mem scal
pages line par load
bytes
--------- ------------- ----------------------- ---- ----- ----- ------ ----
darkstar Lguest 2.6.21 i686-pc-linux-gnu 1602 32 64 2.9500 1
darkstar Lguest 2.6.21 i686-pc-linux-gnu 1602 32 64 2.7500 1
darkstar Linux 2.6.21 i686-pc-linux-gnu 1602 32 64 2.4900 1
darkstar Linux 2.6.21 i686-pc-linux-gnu 1602 32 64 2.5600 1
Processor, Processes - times in microseconds - smaller is better
------------------------------------------------------------------------------
Host OS Mhz null null open slct sig sig fork exec sh
call I/O stat clos TCP inst hndl proc proc proc
--------- ------------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
darkstar Lguest 2.6.21 1602 0.21 0.36 2.57 3.84 0.68 1.64 1137 2653 7960
darkstar Lguest 2.6.21 1602 0.21 0.37 2.38 4.02 0.65 1.75 1137 2653 7960
darkstar Linux 2.6.21 1602 0.18 0.37 3.54 5.20 28.9 0.62 1.59 213. 1042 8725
darkstar Linux 2.6.21 1602 0.18 0.37 4.01 5.88 17.7 0.62 1.50 204. 1077 8840
Basic integer operations - times in nanoseconds - smaller is better
-------------------------------------------------------------------
Host OS intgr intgr intgr intgr intgr
bit add mul div mod
--------- ------------- ------ ------ ------ ------ ------
darkstar Lguest 2.6.21 1.0900 0.8700 4.3300 42.8 41.0
darkstar Lguest 2.6.21 0.9800 1.0300 4.5600 42.8 51.1
darkstar Linux 2.6.21 0.6200 0.6200 2.4800 25.5 26.7
darkstar Linux 2.6.21 0.6200 0.6200 2.4800 25.4 26.7
Basic float operations - times in nanoseconds - smaller is better
-----------------------------------------------------------------
Host OS float float float float
add mul div bogo
--------- ------------- ------ ------ ------ ------
darkstar Lguest 2.6.21 3.8500 4.1100 23.5 7.4000
darkstar Lguest 2.6.21 5.2900 4.4800 18.9 7.3400
darkstar Linux 2.6.21 2.4800 2.4800 10.9 6.2200
darkstar Linux 2.6.21 2.4800 2.4800 10.8 6.2200
Basic double operations - times in nanoseconds - smaller is better
------------------------------------------------------------------
Host OS double double double double
add mul div bogo
--------- ------------- ------ ------ ------ ------
darkstar Lguest 2.6.21 3.7300 4.1100 20.4 6.5700
darkstar Lguest 2.6.21 3.7300 4.1000 23.5 6.5700
darkstar Linux 2.6.21 2.4800 2.4800 10.9 5.5600
darkstar Linux 2.6.21 2.4800 2.4800 10.8 5.6100
Context switching - times in microseconds - smaller is better
-------------------------------------------------------------------------
Host OS 2p/0K 2p/16K 2p/64K 8p/16K 8p/64K 16p/16K 16p/64K
ctxsw ctxsw ctxsw ctxsw ctxsw ctxsw ctxsw
--------- ------------- ------ ------ ------ ------ ------ ------- -------
darkstar Lguest 2.6.21 6.0900 6.9500 136.3 137.1 282.3 160.7 232.0
darkstar Lguest 2.6.21 6.6200 6.9200 130.6 137.1 282.2 160.7 231.9
darkstar Linux 2.6.21 1.1400 1.9600 77.4 26.1 90.3 36.9 123.8
darkstar Linux 2.6.21 1.3700 2.1100 78.9 26.8 90.8 37.2 124.9
*Local* Communication latencies in microseconds - smaller is better
---------------------------------------------------------------------
Host OS 2p/0K Pipe AF UDP RPC/ TCP RPC/ TCP
ctxsw UNIX UDP TCP conn
--------- ------------- ----- ----- ---- ----- ----- ----- ----- ----
darkstar Lguest 2.6.21 6.090 18.3 19.4
darkstar Lguest 2.6.21 6.620 18.5 27.6
darkstar Linux 2.6.21 1.140 8.805 10.7 18.9 64.
darkstar Linux 2.6.21 1.370 9.547 10.8 18.1 62.
File & VM system latencies in microseconds - smaller is better
-------------------------------------------------------------------------------
Host OS 0K File 10K File Mmap Prot Page 100fd
Create Delete Create Delete Latency Fault Fault selct
--------- ------------- ------ ------ ------ ------ ------- ----- ------- -----
darkstar Lguest 2.6.21 24.0 4.0000 220.0 1499.3 629.0 4.207 7.75490 4.205
darkstar Lguest 2.6.21 20.0 8.0000 348.1 2415.5 612.0 3.254 7.75490 4.224
darkstar Linux 2.6.21 47.2 14.8 121.3 28.4 97.0 0.426 1.30680 3.857
darkstar Linux 2.6.21 45.8 14.0 115.4 27.3 97.0 0.617 1.37670 3.822
*Local* Communication bandwidths in MB/s - bigger is better
-----------------------------------------------------------------------------
Host OS Pipe AF TCP File Mmap Bcopy Bcopy Mem Mem
UNIX reread reread (libc) (hand) read write
--------- ------------- ---- ---- ---- ------ ------ ------ ------ ---- -----
darkstar Lguest 2.6.21 139. 146. 420.2 701.4 262.8 262.8 701. 525.6
darkstar Lguest 2.6.21 135. 140. 420.3 701.4 262.8 262.8 525. 525.6
darkstar Linux 2.6.21 156. 979. 134. 406.3 636.6 275.3 276.3 609. 457.3
darkstar Linux 2.6.21 156. 829. 136. 409.3 638.0 293.1 292.2 610. 496.7
Memory latencies in nanoseconds - smaller is better
(WARNING - may not be correct, check graphs)
------------------------------------------------------------------
Host OS Mhz L1 $ L2 $ Main mem Guesses
--------- ------------- --- ---- ---- -------- -------
darkstar Lguest 2.6.21 1602 2.1380 14.7 182.3
darkstar Lguest 2.6.21 1602 2.1380 14.7 182.3
darkstar Linux 2.6.21 1602 1.8650 12.6 155.2
darkstar Linux 2.6.21 1602 1.8620 12.5 154.8
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