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Linux 2.6.32 Kernel Benchmarks
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Well BFS increases compile speed by about 5% with the same number of threads. 7zip should be also a good benchmark for this, but single core benchmarks are useless to show multicore speed.
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I installed 2.632 just now and run some tests to compare 2.6.31-r6 vs 2.6.32.
I repeated each one 4 times and these are the average scores:
lame
0m59.607s ---> 2.6.31-r6
0m59.639s ---> 2.6.32
oggenc
0m24.844s ---> 2.6.31-r6
0m24.480s ---> 2.6.32
x264
1m50.563s with 30.80 fps ---> 2.6.31-r6
1m51.355s with 30.58 fps ---> 2.6.32
In other worlds bullshits. Where's the speed improvement in x264?
Should I enable something specific in kernel?
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Starting by looking at the CPU usage during the playback of a 1080p H.264 video file, the Linux 2.6.32 kernel had the lowest overall CPU usage when using X-Video with MPlayer. However, the CPU usage was only less by 2%.
2.6.30 = 32.3
2.6.31 = 37.2
2.6.32 = 39.1
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Originally posted by kraftman View PostYes, but I/O scheduler will be probably set for throughput for final 2.6.32. Afaik it's set for low latency in -rc and some benchmarks suffer from this. It should be optimized and set default for 2.6.33.
In this release, the CFQ IO scheduler (the one used by default) gets a new feature that greatly helps to reduce the impact that a writer can have on the system interactiveness. The end result is that the desktop experience should be less impacted by background IO activity, but it can cause noticeable performance issues, so people who only cares about throughput (ie, servers) can try to turn it off echoing 0 to /sys/class/block/<device name>/queue/iosched/low_latency. It's worth mentioning that the 'low_latency' setting defaults to on.Last edited by kraftman; 03 December 2009, 11:56 AM.
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I wonder if this boost is just for x264 or if we are gonna see sweet results with lame and oggenc as well
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Originally posted by Luis View PostIt should be noted than on 2.6.32, both the CPU and the I/O schedulers have been tuned for desktop usage (i.e, low latency), which means a drop in throughput in many cases. But desktop users should "feel" things faster, more responsive.
So nothing to worry about here, on the contrary, it just proves that the kernel devs did a bold movement in favour of desktop users.
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Originally posted by Ranguvar View PostWell, CK and Dark Shikari. http://x264dev.multimedia.cx/?p=185
@Phoronix team:
Not lowest. Either 'worst', or 'highest'.
So I guess Michael's technically right, but the text analysis doesn't lead one to look at the average numbers, both of which are important in video playback.
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It should be noted than on 2.6.32, both the CPU and the I/O schedulers have been tuned for desktop usage (i.e, low latency), which means a drop in throughput in many cases. But desktop users should "feel" things faster, more responsive.
So nothing to worry about here, on the contrary, it just proves that the kernel devs did a bold movement in favour of desktop users.
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