Re: [PATCH] sched,numa: document and fix numa_preferred_nid setting

[Srikar Dronamraju]

Updated autonumabenchmark numbers

Plain 4.1.0-rc7-tip (i)
		Testcase:         Min         Max         Avg      StdDev
	  elapsed_numa01:      858.85      949.18      915.64       33.06
	  elapsed_numa02:       23.09       29.89       26.43        2.18
		Testcase:         Min         Max         Avg      StdDev
	   system_numa01:     1516.72     1855.08     1686.24      113.95
	   system_numa02:       63.69       79.06       70.35        5.87
		Testcase:         Min         Max         Avg      StdDev
	     user_numa01:    73284.76    80818.21    78060.88     2773.60
	     user_numa02:     1690.18     2071.07     1821.64      140.25
		Testcase:         Min         Max         Avg      StdDev
	    total_numa01:    74801.50    82572.60    79747.12     2875.61
	    total_numa02:     1753.87     2142.77     1891.99      143.59

tip + Rik's ++ (ii)
		Testcase:         Min         Max         Avg      StdDev     %Change
	  elapsed_numa01:      630.60      860.06      760.07       74.33      18.09%
	  elapsed_numa02:       21.92       34.42       27.72        4.49      -3.75%
		Testcase:         Min         Max         Avg      StdDev     %Change
	   system_numa01:      474.31     1379.49      870.12      296.35      59.16%
	   system_numa02:       63.74      120.25       86.69       20.69     -13.59%
		Testcase:         Min         Max         Avg      StdDev     %Change
	     user_numa01:    53004.03    68125.84    61697.01     5011.38      24.02%
	     user_numa02:     1650.82     2278.71     1941.26      224.59      -5.25%
		Testcase:         Min         Max         Avg      StdDev     %Change
	    total_numa01:    53478.30    69505.30    62567.12     5288.18      24.72%
	    total_numa02:     1714.56     2398.96     2027.95      238.08      -5.67%

tip + Srikar's ++ (iii)
		Testcase:         Min         Max         Avg      StdDev     %Change
	  elapsed_numa01:      690.74      919.49      782.67       78.51      14.46%
	  elapsed_numa02:       21.78       29.57       26.02        2.65       1.39%
		Testcase:         Min         Max         Avg      StdDev     %Change
	   system_numa01:      659.12     1041.19      870.15      143.13      78.38%
	   system_numa02:       52.20       78.73       64.18       11.28       7.84%
		Testcase:         Min         Max         Avg      StdDev     %Change
	     user_numa01:    56410.39    71492.31    62514.78     5444.90      21.75%
	     user_numa02:     1594.27     1934.40     1754.37      126.41       3.48%
		Testcase:         Min         Max         Avg      StdDev     %Change
	    total_numa01:    57069.50    72509.90    63384.94     5567.71      22.57%
	    total_numa02:     1647.85     2010.87     1818.55      136.88       3.65%

tip + Srikar's + Modified Rik's patch (iv)
		Testcase:         Min         Max         Avg      StdDev     %Change
	  elapsed_numa01:      674.72      815.10      746.50       51.81      20.75%
	  elapsed_numa02:       21.02       34.57       27.58        4.63      -3.33%
		Testcase:         Min         Max         Avg      StdDev     %Change
	   system_numa01:      726.19     1099.16      879.36      141.02      73.41%
	   system_numa02:       33.99       72.99       58.89       14.26      15.70%
		Testcase:         Min         Max         Avg      StdDev     %Change
	     user_numa01:    56350.75    67318.49    61998.95     4696.34      23.86%
	     user_numa02:     1518.66     2301.80     1882.96      261.18      -2.66%
		Testcase:         Min         Max         Avg      StdDev     %Change
	    total_numa01:    57076.90    68417.70    62878.32     4826.93      24.66%
	    total_numa02:     1552.65     2374.79     1941.85      274.28      -2.10%

Plain 4.1.0-rc7-tip (i)
tip + Rik's ++ (ii)
tip + Srikar's ++ (iii)
tip + Srikar's + Modified Rik's patch (iv)

(i) = Plain 4.1.0-rc7-tip = tip = 4.1.0-rc7 (b7ca96b)

(ii) =  tip + only Rik's suggested patches =  (i) + Rik's fix numa_preferred_nid setting
	+ Srikar's numa hotness + correct nid for evaluating task weight

(iii)  = tip + Srikar's ++ (iii) = (i) + Srikar's  numa hotness + correct nid for evaluating
	 task weight + numa_has_capacity fix +  always update preferred node

(iv) =  tip + Srikar's ++ (iv) = (i) + Srikar's  numa hotness + correct nid for evaluating
	 task weight + numa_has_capacity fix + Rik's modified patch.
	(Rik's modified patch == I removed node_isset check before setting
	nid as the preferred node)

-- 
Thanks and Regards
Srikar Dronamraju

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