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Hi All,
Here I am putting the results of performance bench mark tool
LMBench (V2.0patch2).
Linux kernel 2.5.43 seems like taking more time for fork and exec
of process. Also taking long time for stat, open&close calls.
Local Communication latencies are also more for 2.5 kernel.
Can any one know why it is??
Thanks,
pavan.
==============================================================================
Linux Kernel - 2.4.20-pre11
==============================================================================
L M B E N C H 2 . 0 S U M M A R Y
------------------------------------
Basic system parameters
----------------------------------------------------
Host OS Description Mhz
--------- ------------- ----------------------- ----
access1 Linux 2.4.20- i686-pc-linux-gnu_2.20- 868
access1 Linux 2.4.20- i686-pc-linux-gnu_2.20- 868
access1 Linux 2.4.20- i686-pc-linux-gnu_2.20- 868
access1 Linux 2.4.20- i686-pc-linux-gnu_2.20- 868
access1 Linux 2.4.20- i686-pc-linux-gnu_2.20- 868
Processor, Processes - times in microseconds - smaller is better
----------------------------------------------------------------
Host OS Mhz null null open selct sig sig fork exec sh
call I/O stat clos TCP inst hndl proc proc proc
--------- ------------- ---- ---- ---- ---- ---- ----- ---- ---- ---- ---- ----
access1 Linux 2.4.20- 868 0.41 0.70 3.97 5.17 30.7 0.96 3.06 195. 756. 4994
access1 Linux 2.4.20- 868 0.41 0.69 3.92 5.19 33.1 0.94 3.03 154. 725. 5209
access1 Linux 2.4.20- 868 0.39 0.74 3.98 5.18 36.1 0.94 3.05 161. 765. 5070
access1 Linux 2.4.20- 868 0.39 0.73 4.00 5.28 31.3 0.94 3.03 157. 796. 5086
access1 Linux 2.4.20- 868 0.39 0.69 4.01 5.13 28.5 0.94 3.05 150. 703. 5053
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
--------- ------------- ----- ------ ------ ------ ------ ------- -------
access1 Linux 2.4.20- 1.150 4.4300 13.7 7.5200 178.1 41.0 181.8
access1 Linux 2.4.20- 1.070 4.4600 14.3 7.4000 181.5 40.7 182.5
access1 Linux 2.4.20- 1.050 4.4600 13.1 7.0300 184.6 38.3 183.2
access1 Linux 2.4.20- 1.220 4.4400 14.1 6.5200 180.7 42.9 183.3
access1 Linux 2.4.20- 1.020 4.4600 13.3 9.1600 181.2 44.7 182.7
*Local* Communication latencies in microseconds - smaller is better
-------------------------------------------------------------------
Host OS 2p/0K Pipe AF UDP RPC/ TCP RPC/ TCP
ctxsw UNIX UDP TCP conn
--------- ------------- ----- ----- ---- ----- ----- ----- ----- ----
access1 Linux 2.4.20- 1.150 6.365 11.3 18.4 39.1 25.5 52.1 87.1
access1 Linux 2.4.20- 1.070 6.325 11.2 18.4 39.7 25.7 52.9 85.4
access1 Linux 2.4.20- 1.050 6.405 11.4 18.5 39.5 26.0 53.3 87.5
access1 Linux 2.4.20- 1.220 6.651 11.6 18.4 39.6 25.8 51.9 299K
access1 Linux 2.4.20- 1.020 6.429 11.2 18.2 39.4 25.8 51.8 189.
File & VM system latencies in microseconds - smaller is better
--------------------------------------------------------------
Host OS 0K File 10K File Mmap Prot Page
Create Delete Create Delete Latency Fault Fault
--------- ------------- ------ ------ ------ ------ ------- ----- -----
access1 Linux 2.4.20- 72.4 26.3 232.9 51.9 282.0 0.785 3.00000
access1 Linux 2.4.20- 71.2 25.2 232.0 50.7 279.0 0.797 3.00000
access1 Linux 2.4.20- 72.6 26.5 237.1 52.0 279.0 0.797 2.00000
access1 Linux 2.4.20- 72.5 25.8 236.7 50.9 280.0 0.794 3.00000
access1 Linux 2.4.20- 71.3 25.4 234.5 50.7 278.0 0.797 3.00000
*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
--------- ------------- ---- ---- ---- ------ ------ ------ ------ ---- -----
access1 Linux 2.4.20- 680. 584. 115. 282.3 353.9 112.0 103.5 353. 142.1
access1 Linux 2.4.20- 684. 455. 155. 299.7 353.9 111.7 103.0 353. 141.6
access1 Linux 2.4.20- 712. 316. 144. 316.8 352.6 111.2 102.9 352. 141.4
access1 Linux 2.4.20- 668. 314. 145. 309.8 352.1 111.7 103.0 352. 141.2
access1 Linux 2.4.20- 706. 379. 111. 314.8 351.1 111.6 102.8 351. 141.1
Memory latencies in nanoseconds - smaller is better
(WARNING - may not be correct, check graphs)
---------------------------------------------------
Host OS Mhz L1 $ L2 $ Main mem Guesses
--------- ------------- ---- ----- ------ -------- -------
access1 Linux 2.4.20- 868 3.456 54.5 177.0
access1 Linux 2.4.20- 868 3.456 8.0680 177.3
access1 Linux 2.4.20- 868 3.456 8.0630 177.8
access1 Linux 2.4.20- 868 3.471 8.0740 177.9
access1 Linux 2.4.20- 868 3.456 8.0750 177.8
==============================================================================
Linux Kernel - 2.5.43
==============================================================================
L M B E N C H 2 . 0 S U M M A R Y
------------------------------------
Basic system parameters
----------------------------------------------------
Host OS Description Mhz
--------- ------------- ----------------------- ----
access1 Linux 2.5.43 i686-pc-linux-gnu 868
access1 Linux 2.5.43 i686-pc-linux-gnu 868
access1 Linux 2.5.43 i686-pc-linux-gnu 868
access1 Linux 2.5.43 i686-pc-linux-gnu 868
access1 Linux 2.5.43 i686-pc-linux-gnu 868
Processor, Processes - times in microseconds - smaller is better
----------------------------------------------------------------
Host OS Mhz null null open selct sig sig fork exec sh
call I/O stat clos TCP inst hndl proc proc proc
--------- ------------- ---- ---- ---- ---- ---- ----- ---- ---- ---- ---- ----
access1 Linux 2.5.43 868 0.39 0.77 24.6 26.2 29.9 1.02 4.73 469. 1617 7590
access1 Linux 2.5.43 868 0.39 0.77 24.6 26.3 1.02 4.73 388. 1619 7840
access1 Linux 2.5.43 868 0.41 0.81 24.6 26.2 33.2 1.06 4.72 354. 1557 7704
access1 Linux 2.5.43 868 0.39 0.79 24.7 26.3 34.4 1.02 4.73 348. 1582 7676
access1 Linux 2.5.43 868 0.39 0.77 24.6 26.3 34.9 1.02 4.72 420. 1591 7650
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
--------- ------------- ----- ------ ------ ------ ------ ------- -------
access1 Linux 2.5.43 1.230 4.5300 13.2 5.7400 187.7 44.1 188.3
access1 Linux 2.5.43 1.210 4.5400 13.1 4.8400 187.0 43.1 189.8
access1 Linux 2.5.43 1.270 4.7700 13.5 6.0400 189.9 48.5 189.8
access1 Linux 2.5.43 1.130 4.5500 13.3 6.4000 188.0 45.7 190.1
access1 Linux 2.5.43 1.080 4.5200 13.4 7.8700 189.0 43.7 189.8
*Local* Communication latencies in microseconds - smaller is better
-------------------------------------------------------------------
Host OS 2p/0K Pipe AF UDP RPC/ TCP RPC/ TCP
ctxsw UNIX UDP TCP conn
--------- ------------- ----- ----- ---- ----- ----- ----- ----- ----
access1 Linux 2.5.43 1.230 7.071 19.9 28.9 53.5 113.7 146.9 141.
access1 Linux 2.5.43 1.210 7.021 20.2 28.8 54.1 113.9 147.6 140.
access1 Linux 2.5.43 1.270 7.748 20.3 29.7 53.6 113.7 127.5 141.
access1 Linux 2.5.43 1.130 7.650 20.5 29.7 53.8 114.0 148.1 145.
access1 Linux 2.5.43 1.080 7.333 20.3 28.9 54.2 114.1 152.2 145.
File & VM system latencies in microseconds - smaller is better
--------------------------------------------------------------
Host OS 0K File 10K File Mmap Prot Page
Create Delete Create Delete Latency Fault Fault
--------- ------------- ------ ------ ------ ------ ------- ----- -----
access1 Linux 2.5.43 98.2 53.1 283.5 88.6 498.0 0.993 4.00000
access1 Linux 2.5.43 98.4 53.3 285.3 89.1 516.0 0.991 4.00000
access1 Linux 2.5.43 98.4 53.4 285.1 88.9 506.0 1.012 4.00000
access1 Linux 2.5.43 98.4 53.4 287.3 88.4 504.0 0.998 4.00000
access1 Linux 2.5.43 98.2 53.3 287.0 89.3 513.0 0.995 4.00000
*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
--------- ------------- ---- ---- ---- ------ ------ ------ ------ ---- -----
access1 Linux 2.5.43 368. 148. 17.7 310.1 348.2 111.4 103.5 348. 140.7
access1 Linux 2.5.43 491. 145. 17.6 306.0 343.4 110.7 102.6 344. 139.4
access1 Linux 2.5.43 473. 149. 17.4 288.7 343.8 110.8 102.6 344. 139.5
access1 Linux 2.5.43 473. 143. 17.5 307.4 344.7 110.4 102.6 344. 139.5
access1 Linux 2.5.43 493. 141. 16.9 305.7 344.8 111.0 103.1 344. 139.6
Memory latencies in nanoseconds - smaller is better
(WARNING - may not be correct, check graphs)
---------------------------------------------------
Host OS Mhz L1 $ L2 $ Main mem Guesses
--------- ------------- ---- ----- ------ -------- -------
access1 Linux 2.5.43 868 3.490 8.1540 179.8
access1 Linux 2.5.43 868 3.492 8.1540 181.2
access1 Linux 2.5.43 868 3.489 63.2 180.9
access1 Linux 2.5.43 868 3.489 8.1880 180.8
access1 Linux 2.5.43 868 3.490 57.8 181.2
==============================================================================
============================================
PAVAN KUMAR REDDY N.S.
Sr.Software Engineer
Wipro Technologies
53/1, Hosur road, Madivala
Bangalore - 68.
Phone Off: +91-80-5502001-8 extn: 6087.
Res: +91-80-6685179
http://www.wipro.com/linux/
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