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Date: Wed, 20 Aug 2014 23:58:45 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Rik van Riel <riel@...hat.com>
Cc: Dave Hansen <dave.hansen@...el.com>,
LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [sched/numa] 0132c3e1777: -6.4% vm-scalability.throughput
Hi Rik,
FYI, we noticed the below changes on commit
0132c3e1777ceabc24c7d209b7cbe78c28c03c09 ("sched/numa: Examine a task move when examining a task swap")
test case: brickland3/vm-scalability/300s-1T-anon-cow-seq
1c5d3eb3759013b 0132c3e1777ceabc24c7d209b
--------------- -------------------------
36496955 ± 0% -6.4% 34158456 ± 0% TOTAL vm-scalability.throughput
0.82 ±24% +239.4% 2.79 ±10% TOTAL turbostat.%pc2
3.83e+08 ± 4% -55.8% 1.693e+08 ±10% TOTAL cpuidle.C1-IVT-4S.time
103637 ± 3% +32.8% 137617 ± 1% TOTAL cpuidle.C6-IVT-4S.usage
14451 ±12% +28.1% 18508 ± 4% TOTAL proc-vmstat.numa_pages_migrated
14451 ±12% +28.1% 18508 ± 4% TOTAL proc-vmstat.pgmigrate_success
4.13e+09 ± 1% +18.2% 4.882e+09 ± 0% TOTAL cpuidle.C6-IVT-4S.time
5858 ± 6% -16.1% 4915 ± 1% TOTAL proc-vmstat.nr_mapped
786 ± 7% +14.1% 897 ± 6% TOTAL numa-vmstat.node0.nr_alloc_batch
9.62 ± 2% -13.2% 8.35 ± 2% TOTAL turbostat.%c1
14.64 ± 3% +16.1% 17.00 ± 1% TOTAL turbostat.%c6
123533 ± 5% -9.3% 112004 ± 0% TOTAL proc-vmstat.pgactivate
21982 ± 4% -11.0% 19567 ± 1% TOTAL meminfo.Mapped
5037 ± 4% -8.1% 4630 ± 4% TOTAL numa-meminfo.node0.Mapped
45737 ±10% -28.6% 32671 ± 9% TOTAL time.voluntary_context_switches
3124 ± 7% -15.6% 2637 ± 2% TOTAL vmstat.system.cs
10226 ± 0% +7.4% 10978 ± 0% TOTAL time.system_time
154 ± 0% +7.1% 165 ± 0% TOTAL time.elapsed_time
153975 ± 3% -6.2% 144429 ± 0% TOTAL vmstat.system.in
168 ± 0% -3.2% 163 ± 0% TOTAL turbostat.RAM_W
374 ± 0% -1.6% 368 ± 0% TOTAL turbostat.Cor_W
458 ± 0% -1.5% 451 ± 0% TOTAL turbostat.Pkg_W
9092 ± 0% -1.5% 8953 ± 0% TOTAL time.percent_of_cpu_this_job_got
75.72 ± 0% -1.5% 74.61 ± 0% TOTAL turbostat.%c0
The test box configuration is
brickland3: Brickland Ivy Bridge-EX
Memory: 512G
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 120
On-line CPU(s) list: 0-119
Thread(s) per core: 2
Core(s) per socket: 15
Socket(s): 4
NUMA node(s): 4
Vendor ID: GenuineIntel
CPU family: 6
Model: 62
Stepping: 7
CPU MHz: 3192.875
BogoMIPS: 5593.49
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 38400K
NUMA node0 CPU(s): 0-14,60-74
NUMA node1 CPU(s): 15-29,75-89
NUMA node2 CPU(s): 30-44,90-104
NUMA node3 CPU(s): 45-59,105-119
time.system_time
11500 ++------------------------------------------------------------------+
| |
| O O O O O O O O O O O O O |
11000 O+ O O O O O O O O O O O O
| |
| |
10500 ++ |
| .*..*..*.. .*.. .*.. .*..*..*. |
10000 ++ * * *. * * |
| + |
| * + |
9500 ++ .. : *. .* |
| .*.* : + *. |
*. : + |
9000 ++---------*--------------------------------------------------------+
time.elapsed_time
170 ++--------------------------------------------------------------------+
| O O O O O O O |
O O O O O O O O O O O O O O O O O
165 ++ O O |
| |
| |
160 ++ |
| |
155 ++ .*.. .*.. .*..*.. |
| *. *..*..*.*..*. .* * |
| * + *. |
150 ++ + + *..*..* |
*..*..* + .. |
| * |
145 ++--------------------------------------------------------------------+
vm-scalability.throughput
4e+07 ++---------*------------------------------------------------------+
*.. : : |
3.9e+07 ++ *.*.. : : .*. |
| : *. * |
3.8e+07 ++ * : |
| : |
3.7e+07 ++ : .*.. .*.. |
| *..*.*..*..*.*. * .*.*..* |
3.6e+07 ++ *. |
| |
3.5e+07 ++ |
| O |
3.4e+07 O+ O O O O O O O O O O O O O O O O O O
| O O O O O O |
3.3e+07 ++----------------------------------------------------------------+
turbostat.RAM_W
173 ++--------------------------------------------------------------------+
172 *+. *.. |
| .* + |
171 ++ *. + + *..*..*. |
170 ++ * *..*.. *.. |
169 ++ *.. .*.. .. .*..* |
168 ++ *..*.*. * *.*. |
| |
167 ++ |
166 ++ |
165 ++ |
164 ++ O O |
O O O O O O O O
163 ++ O O O O O O O O O O O O O O O |
162 ++--------------------------------O-----------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.
Thanks,
Fengguang
View attachment "reproduce" of type "text/plain" (10517 bytes)
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