Hi,
It seems that the nbench is not the most appropriate suit for comparing OSs
(or OS versions), since its programs exercise only the CPU/memory
subs-system. More suitable for comparing OSs are suites like unixbench and
lmbench, which include many programs that exercise the OS calls/services.
Please find attached the results I have obtained when running the
unixbench-4.1.0 for the kernels 2.4.26 and 2.6.14. The 2.4.26 has better
indexes for 5 of the 6 tests from unixbench that I have run.
On Tuesday 14 March 2006 08:50, David Jander wrote:
> On Friday 10 March 2006 16:33, Wolfgang Denk wrote:
> > > I believe most of those observations and measurements are not valid
> > > anymore. Kernel 2.6 for 8xx has come a long way since this article was
> > > written. It might have been true back then, but it surely isn't
> > > anymore.
> >
> > So did you actually run any benchmarks? Specilations on what might be
> > or should be are not really helpful.
>
> Of course I did. Otherwise I wouldn't say this.
>
> Here's some benchmark data from nbench (sorry didn't try lmbench yet):
>
> The same ELDK (version 3.1.1) for both kernels, running on exactly the same
> board (MPC852T 100MHz, with 32Mbyte SDRAM and 32Mbyte Flash running from
> NFS root). I removed some FPU benchmarks, as they are pretty meaningless
> for this board and take an ethernity otherwise.
Best regards,
--
Carlos Mitidieri
SYSGO AG - Office Ulm
-------------- next part --------------
BYTE UNIX Benchmarks (Version 4.1.0)
System -- Linux 2.4.26 Tue Mar 7 08:56:57 CET 2006 ppc unknown
Start Benchmark Run: Thu Jan 1 01:13:27 UTC 1970
1:13am up 1:13, load average: 0.07, 0.73, 0.80
lrwxrwxrwx 1 root root 9 Jan 1 00:00 /bin/sh -> /bin/bash
System Call Overhead 243637.1 lps (10.0 secs, 10 samples)
Pipe Throughput 246562.1 lps (10.0 secs, 10 samples)
Pipe-based Context Switching 114521.0 lps (10.0 secs, 10 samples)
Process Creation 2199.0 lps (30.0 secs, 3 samples)
Execl Throughput 362.8 lps (29.7 secs, 3 samples)
Shell Scripts (1 concurrent) 680.0 lpm (60.0 secs, 3 samples)
Shell Scripts (8 concurrent) 92.0 lpm (60.0 secs, 3 samples)
Shell Scripts (16 concurrent) 46.0 lpm (60.0 secs, 3 samples)
INDEX VALUES
TEST BASELINE RESULT INDEX
Execl Throughput 43.0 362.8 84.4
Pipe Throughput 12440.0 246562.1 198.2
Pipe-based Context Switching 4000.0 114521.0 286.3
Process Creation 126.0 2199.0 174.5
Shell Scripts (8 concurrent) 6.0 92.0 153.3
System Call Overhead 15000.0 243637.1 162.4
=========
FINAL SCORE 165.8
-------------- next part --------------
BYTE UNIX Benchmarks (Version 4.1.0)
System -- Linux 2.6.14 Tue Mar 7 12:50:28 CET 2006 ppc unknown
Start Benchmark Run: Thu Jan 1 00:06:12 UTC 1970
12:06am up 6 min, load average: 0.00, 0.00, 0.00
lrwxrwxrwx 1 root root 9 Jan 1 00:00 /bin/sh -> /bin/bash
System Call Overhead 339524.9 lps (10.0 secs, 10 samples)
Pipe Throughput 236842.6 lps (10.0 secs, 10 samples)
Pipe-based Context Switching 106498.2 lps (10.0 secs, 10 samples)
Process Creation 1873.8 lps (30.0 secs, 3 samples)
Execl Throughput 372.6 lps (29.8 secs, 3 samples)
Shell Scripts (1 concurrent) 650.4 lpm (60.0 secs, 3 samples)
Shell Scripts (8 concurrent) 88.0 lpm (60.0 secs, 3 samples)
Shell Scripts (16 concurrent) 44.0 lpm (60.0 secs, 3 samples)
INDEX VALUES
TEST BASELINE RESULT INDEX
Execl Throughput 43.0 372.6 86.7
Pipe Throughput 12440.0 236842.6 190.4
Pipe-based Context Switching 4000.0 106498.2 266.2
Process Creation 126.0 1873.8 148.7
Shell Scripts (8 concurrent) 6.0 88.0 146.7
System Call Overhead 15000.0 339524.9 226.3
=========
FINAL SCORE 167.0
