As it’s named, kidle_inject is a process to inject idleness to processors.

On a good day, this will keep idle your processors, lower processor temperature, and save your battery.

On a bad day, it will consume your processor somewhat like 50%+ on all cores, slow down your laptop, and drain your battery.

But, you can control this. Many new Intel-based processors could use intel_pstate driver to manage processor power consumption. If you use intel_pstate, you can drop intel_powerclamp (which would run kidle_inject). help your laptop to consume less power.

Just

# modprobe -r intel_powerclamp

Or, consider to put

blacklist intel_powerclamp

in your /etc/modules (or modprobe)

YMMV.

Got a chance to grab 8 dedicated servers. All of them are identical configuration.

• Intel Xeon E5-2660 2.20 GHz – 8 Core / 16 Threads
• 16GB (DDR3) Memory
• 240GB (SSD) Storage
• 1 Gbps Network Port

And I put Debian on 2 of them and Ubuntu 2 of them. Since I use these servers for computation, I tested all of them  by running Intel LINPACK Benchmark.

The results:
Ubuntu 16.04.2 / Linux 4.4.0

Size   LDA    Align.  Average  Maximal
1000   1000   4       57.1781  63.1674
2000   2000   4       96.3596  99.1686
5000   5008   4       120.8776 121.0789
10000  10000  4       129.6896 129.7670
15000  15000  4       132.1119 132.1371
18000  18008  4       133.5032 133.6047
20000  20016  4       134.7515 134.7724
22000  22008  4       134.7769 134.8034
25000  25000  4       135.2187 135.2249
26000  26000  4       135.3471 135.3511
27000  27000  4       135.7265 135.7265
30000  30000  1       135.9339 135.9339
35000  35000  1       136.3998 136.3998
40000  40000  1       136.0928 136.0928
45000  45000  1       135.4024 135.4024

Ubuntu 16.10 / Linux 4.8.0

Size   LDA    Align.  Average  Maximal
1000   1000   4       67.6860  75.8030
2000   2000   4       97.1338  98.9928
5000   5008   4       120.8437 120.9400
10000  10000  4       129.5845 129.5925
15000  15000  4       132.0033 132.0423
18000  18008  4       133.5847 133.5954
20000  20016  4       134.7129 134.7186
22000  22008  4       134.7988 134.8389
25000  25000  4       135.1581 135.1615
26000  26000  4       135.2965 135.2966
27000  27000  4       135.7175 135.7175
30000  30000  1       135.8775 135.8775
35000  35000  1       136.3674 136.3674
40000  40000  1       136.0681 136.0681
45000  45000  1       135.6452 135.6452

Debian 8.7 / Linux 3.16.0

Size   LDA    Align.  Average  Maximal
1000   1000   4       57.1597  62.6083
2000   2000   4       87.6385  96.1681
5000   5008   4       115.0042 115.2121
10000  10000  4       120.6037 120.7413
15000  15000  4       126.8568 126.8810
18000  18008  4       128.2295 128.2299
20000  20016  4       128.9295 128.9335
22000  22008  4       129.7550 129.7679
25000  25000  4       130.2622 130.2687
26000  26000  4       130.4710 130.4769
27000  27000  4       130.1460 130.1460
30000  30000  1       131.0764 131.0764
35000  35000  1       131.8341 131.8341
40000  40000  1       131.7159 131.7159
45000  45000  1       131.6021 131.6021

Debian 8.7 / Linux 4.8.0

Size   LDA    Align.  Average  Maximal
1000   1000   4       73.9033  75.2857
2000   2000   4       96.1756  98.1587
5000   5008   4       114.9453 115.1133
10000  10000  4       120.6623 120.6715
15000  15000  4       126.8516 126.8579
18000  18008  4       128.1927 128.1953
20000  20016  4       128.9059 128.9097
22000  22008  4       129.7727 129.8013
25000  25000  4       130.2268 130.2318
26000  26000  4       130.4389 130.4403
27000  27000  4       130.1010 130.1010
30000  30000  1       131.1211 131.1211
35000  35000  1       131.8388 131.8388
40000  40000  1       131.7462 131.7462
45000  45000  1       131.6341 131.6341

Now,  can anyone tell me why Debian is slower ? .. hmm