2006-04-01 01:42:29 +02:00
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2005-04-16 15:20:36 -07:00
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2006-04-01 01:43:18 +02:00
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2006-04-01 01:44:30 +02:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-07-12 13:58:33 -07:00
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2005-04-16 15:20:36 -07:00
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2006-03-05 22:33:34 -07:00
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2005-04-16 15:20:36 -07:00
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2006-06-26 00:25:05 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2006-01-25 23:47:36 -05:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-08-12 00:31:00 -04:00
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2005-10-23 12:57:11 -07:00
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2005-08-12 00:31:00 -04:00
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2006-06-26 00:25:12 -07:00
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2005-09-12 18:49:25 +02:00
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2005-10-23 12:57:11 -07:00
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2005-09-12 18:49:25 +02:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2006-06-26 00:25:05 -07:00
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2005-04-16 15:20:36 -07:00
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2006-03-08 17:57:25 -08:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2006-03-25 03:08:17 -08:00
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2005-04-16 15:20:36 -07:00
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2006-03-25 03:08:17 -08:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-06-25 14:57:52 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2006-07-03 00:24:48 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-12-05 16:46:36 -05:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2006-01-14 13:21:20 -08:00
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2005-10-23 12:57:11 -07:00
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2006-01-09 20:51:47 -08:00
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2005-10-23 12:57:11 -07:00
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2006-01-09 20:51:47 -08:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-09-04 01:42:00 -05:00
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2005-04-16 15:20:36 -07:00
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2005-06-25 14:54:25 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-12-13 03:05:03 -05:00
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2005-04-16 15:20:36 -07:00
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2006-09-13 19:57:18 -07:00
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2005-06-28 20:45:18 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2006-01-14 13:21:19 -08:00
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2005-04-16 15:20:36 -07:00
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2006-01-14 13:21:19 -08:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-10-23 12:57:11 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-06-29 18:00:00 -07:00
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2005-10-23 12:57:11 -07:00
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2005-10-23 12:57:11 -07:00
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2006-01-09 20:51:46 -08:00
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[PATCH] scheduler cache-hot-autodetect
)
From: Ingo Molnar <mingo@elte.hu>
This is the latest version of the scheduler cache-hot-auto-tune patch.
The first problem was that detection time scaled with O(N^2), which is
unacceptable on larger SMP and NUMA systems. To solve this:
- I've added a 'domain distance' function, which is used to cache
measurement results. Each distance is only measured once. This means
that e.g. on NUMA distances of 0, 1 and 2 might be measured, on HT
distances 0 and 1, and on SMP distance 0 is measured. The code walks
the domain tree to determine the distance, so it automatically follows
whatever hierarchy an architecture sets up. This cuts down on the boot
time significantly and removes the O(N^2) limit. The only assumption
is that migration costs can be expressed as a function of domain
distance - this covers the overwhelming majority of existing systems,
and is a good guess even for more assymetric systems.
[ People hacking systems that have assymetries that break this
assumption (e.g. different CPU speeds) should experiment a bit with
the cpu_distance() function. Adding a ->migration_distance factor to
the domain structure would be one possible solution - but lets first
see the problem systems, if they exist at all. Lets not overdesign. ]
Another problem was that only a single cache-size was used for measuring
the cost of migration, and most architectures didnt set that variable
up. Furthermore, a single cache-size does not fit NUMA hierarchies with
L3 caches and does not fit HT setups, where different CPUs will often
have different 'effective cache sizes'. To solve this problem:
- Instead of relying on a single cache-size provided by the platform and
sticking to it, the code now auto-detects the 'effective migration
cost' between two measured CPUs, via iterating through a wide range of
cachesizes. The code searches for the maximum migration cost, which
occurs when the working set of the test-workload falls just below the
'effective cache size'. I.e. real-life optimized search is done for
the maximum migration cost, between two real CPUs.
This, amongst other things, has the positive effect hat if e.g. two
CPUs share a L2/L3 cache, a different (and accurate) migration cost
will be found than between two CPUs on the same system that dont share
any caches.
(The reliable measurement of migration costs is tricky - see the source
for details.)
Furthermore i've added various boot-time options to override/tune
migration behavior.
Firstly, there's a blanket override for autodetection:
migration_cost=1000,2000,3000
will override the depth 0/1/2 values with 1msec/2msec/3msec values.
Secondly, there's a global factor that can be used to increase (or
decrease) the autodetected values:
migration_factor=120
will increase the autodetected values by 20%. This option is useful to
tune things in a workload-dependent way - e.g. if a workload is
cache-insensitive then CPU utilization can be maximized by specifying
migration_factor=0.
I've tested the autodetection code quite extensively on x86, on 3
P3/Xeon/2MB, and the autodetected values look pretty good:
Dual Celeron (128K L2 cache):
---------------------
migration cost matrix (max_cache_size: 131072, cpu: 467 MHz):
---------------------
[00] [01]
[00]: - 1.7(1)
[01]: 1.7(1) -
---------------------
cacheflush times [2]: 0.0 (0) 1.7 (1784008)
---------------------
Here the slow memory subsystem dominates system performance, and even
though caches are small, the migration cost is 1.7 msecs.
Dual HT P4 (512K L2 cache):
---------------------
migration cost matrix (max_cache_size: 524288, cpu: 2379 MHz):
---------------------
[00] [01] [02] [03]
[00]: - 0.4(1) 0.0(0) 0.4(1)
[01]: 0.4(1) - 0.4(1) 0.0(0)
[02]: 0.0(0) 0.4(1) - 0.4(1)
[03]: 0.4(1) 0.0(0) 0.4(1) -
---------------------
cacheflush times [2]: 0.0 (33900) 0.4 (448514)
---------------------
Here it can be seen that there is no migration cost between two HT
siblings (CPU#0/2 and CPU#1/3 are separate physical CPUs). A fast memory
system makes inter-physical-CPU migration pretty cheap: 0.4 msecs.
8-way P3/Xeon [2MB L2 cache]:
---------------------
migration cost matrix (max_cache_size: 2097152, cpu: 700 MHz):
---------------------
[00] [01] [02] [03] [04] [05] [06] [07]
[00]: - 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1)
[01]: 19.2(1) - 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1)
[02]: 19.2(1) 19.2(1) - 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1)
[03]: 19.2(1) 19.2(1) 19.2(1) - 19.2(1) 19.2(1) 19.2(1) 19.2(1)
[04]: 19.2(1) 19.2(1) 19.2(1) 19.2(1) - 19.2(1) 19.2(1) 19.2(1)
[05]: 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) - 19.2(1) 19.2(1)
[06]: 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) - 19.2(1)
[07]: 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) -
---------------------
cacheflush times [2]: 0.0 (0) 19.2 (19281756)
---------------------
This one has huge caches and a relatively slow memory subsystem - so the
migration cost is 19 msecs.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Ken Chen <kenneth.w.chen@intel.com>
Cc: <wilder@us.ibm.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-12 01:05:30 -08:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2006-01-03 09:55:41 +01:00
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2006-01-03 09:55:57 +01:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2006-07-30 03:03:11 -07:00
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2005-04-16 15:20:36 -07:00
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2006-03-23 02:59:34 -08:00
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2006-02-22 09:57:55 +09:00
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2006-04-01 01:36:09 +02:00
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2005-04-16 15:20:36 -07:00
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2006-03-23 02:59:34 -08:00
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2005-10-23 12:57:11 -07:00
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2006-01-07 23:18:19 +00:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2006-03-23 03:00:57 -08:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2006-02-15 15:17:43 -08:00
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2006-03-05 22:33:34 -07:00
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2005-10-23 12:57:11 -07:00
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2005-03-21 20:20:42 -08:00
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2005-12-28 12:43:51 -05:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2006-03-07 21:55:33 -08:00
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2005-09-06 15:17:19 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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[SECMARK]: Add new packet controls to SELinux
Add new per-packet access controls to SELinux, replacing the old
packet controls.
Packets are labeled with the iptables SECMARK and CONNSECMARK targets,
then security policy for the packets is enforced with these controls.
To allow for a smooth transition to the new controls, the old code is
still present, but not active by default. To restore previous
behavior, the old controls may be activated at runtime by writing a
'1' to /selinux/compat_net, and also via the kernel boot parameter
selinux_compat_net. Switching between the network control models
requires the security load_policy permission. The old controls will
probably eventually be removed and any continued use is discouraged.
With this patch, the new secmark controls for SElinux are disabled by
default, so existing behavior is entirely preserved, and the user is
not affected at all.
It also provides a config option to enable the secmark controls by
default (which can always be overridden at boot and runtime). It is
also noted in the kconfig help that the user will need updated
userspace if enabling secmark controls for SELinux and that they'll
probably need the SECMARK and CONNMARK targets, and conntrack protocol
helpers, although such decisions are beyond the scope of kernel
configuration.
Signed-off-by: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-09 00:33:33 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2006-06-26 00:25:05 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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[PATCH] vdso: randomize the i386 vDSO by moving it into a vma
Move the i386 VDSO down into a vma and thus randomize it.
Besides the security implications, this feature also helps debuggers, which
can COW a vma-backed VDSO just like a normal DSO and can thus do
single-stepping and other debugging features.
It's good for hypervisors (Xen, VMWare) too, which typically live in the same
high-mapped address space as the VDSO, hence whenever the VDSO is used, they
get lots of guest pagefaults and have to fix such guest accesses up - which
slows things down instead of speeding things up (the primary purpose of the
VDSO).
There's a new CONFIG_COMPAT_VDSO (default=y) option, which provides support
for older glibcs that still rely on a prelinked high-mapped VDSO. Newer
distributions (using glibc 2.3.3 or later) can turn this option off. Turning
it off is also recommended for security reasons: attackers cannot use the
predictable high-mapped VDSO page as syscall trampoline anymore.
There is a new vdso=[0|1] boot option as well, and a runtime
/proc/sys/vm/vdso_enabled sysctl switch, that allows the VDSO to be turned
on/off.
(This version of the VDSO-randomization patch also has working ELF
coredumping, the previous patch crashed in the coredumping code.)
This code is a combined work of the exec-shield VDSO randomization
code and Gerd Hoffmann's hypervisor-centric VDSO patch. Rusty Russell
started this patch and i completed it.
[akpm@osdl.org: cleanups]
[akpm@osdl.org: compile fix]
[akpm@osdl.org: compile fix 2]
[akpm@osdl.org: compile fix 3]
[akpm@osdl.org: revernt MAXMEM change]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Cc: Gerd Hoffmann <kraxel@suse.de>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Zachary Amsden <zach@vmware.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-27 02:53:50 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2006-06-29 15:08:25 +02:00
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2005-04-16 15:20:36 -07:00
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2006-06-29 15:08:25 +02:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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2006-02-16 23:41:58 +01:00
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2005-04-16 15:20:36 -07:00
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2005-10-23 12:57:11 -07:00
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2005-04-16 15:20:36 -07:00
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