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Subject[MMTests] Sysbench read-only on ext3
Configuration:	global-dhp__io-sysbench-large-ro-ext3
Result: http://www.csn.ul.ie/~mel/postings/mmtests-20120424/global-dhp__io-sysbench-large-ro-ext3
Benchmarks: sysbench

Summary
=======

Very large number of regressions.

Benchmark notes
===============

mkfs was run on system startup. No attempt was made to age it. No
special mkfs or mount options were used.

sysbench is an OLTP-like benchmark. The test type was "complex" and
read-only. The table size was 50,000,000 rows regardless of memory size
but far exceeds the memory size of any of the test machines. sysbench
was chosen because it's a reasonably complex OLTP-like benchmark with
straight-forward prerequisites.

The backing database was postgres.

===========================================================
Machine: arnold
Result: http://www.csn.ul.ie/~mel/postings/mmtests-20120424/global-dhp__io-sysbench-large-ro-ext3/arnold/comparison.html
Arch: x86
CPUs: 1 socket, 2 threads
Model: Pentium 4
Disk: Single Rotary Disk
===========================================================

sysbench
--------
Oddly two clients is better but 1 or 4 is worse.

Swapping for kernels 3.1 and 3.2 is crazy. Direct reclaim started since
2.6.39 and has not eased off but in the context of the overall test is
very low.

==========================================================
Machine: hydra
Result: http://www.csn.ul.ie/~mel/postings/mmtests-20120424/global-dhp__io-sysbench-large-ro-ext3/hydra/comparison.html
Arch: x86-64
CPUs: 1 socket, 4 threads
Model: AMD Phenom II X4 940
Disk: Single Rotary Disk
Status: Ok
==========================================================

sysbench
--------
There are a lot of regressions here that were mostly introduced between
2.6.39 and 3.0. In general, this is looking bad.

Swapping in kernel 3.1 was higher.

==========================================================
Machine: sandy
Result: http://www.csn.ul.ie/~mel/postings/mmtests-20120424/global-dhp__io-sysbench-large-ro-ext3/sandy/comparison.html
Arch: x86-64
CPUs: 1 socket, 8 threads
Model: Intel Core i7-2600
Disk: Single Rotary Disk
Status:
==========================================================

Generally this is telling a much better story but this could be because
of the much larger memory size of this machine offsetting some other
regression.

Swapping in 3.1 and 3.2.

--
Mel Gorman
SUSE Labs


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