Messages in this thread | | | Date | Mon, 23 Jul 2012 22:13:34 +0100 | From | Mel Gorman <> | Subject | [MMTests] Sysbench read-only on ext3 |
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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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