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Android 4.1 in AOSP

Posted Jul 11, 2012 16:56 UTC (Wed) by rgfernandes (guest, #78238)
In reply to: Android 4.1 in AOSP by mikemol
Parent article: Android 4.1 in AOSP

I have made some benchmarks.
Here in my work we have a server with 24 GB RAM and 2 Xeons with 6 cores each.

time make -j 24 -l 12

real 26m9.001s
user 276m9.904s
sys 14m4.001s

time make -j 24

real 17m58.537s
user 349m16.886s
sys 17m46.843s

time make -j 12

real 21m1.784s
user 252m42.776s
sys 12m22.878s

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Android 4.1 in AOSP

Posted Jul 11, 2012 16:57 UTC (Wed) by rgfernandes (guest, #78238) [Link]

I forgot to say: Android 4.0.3

Android 4.1 in AOSP

Posted Jul 11, 2012 17:07 UTC (Wed) by mikemol (subscriber, #83507) [Link]

Interesting. I wonder why the difference in behaviors between your system and mine. Cache size? I/O? Do you have I'll try to get back with some benchmarks of my own later this week.

FWIW, my rough stats are:
2xE5345
10GB RAM. (I'll have to double-check what speed)
(And I'll put together a decent disk profile, too)

Android 4.1 in AOSP

Posted Jul 11, 2012 17:32 UTC (Wed) by rgfernandes (guest, #78238) [Link]

The server use a RAID 5 with SCSI disks.
Maybe it is the disks.

Android 4.1 in AOSP

Posted Jul 11, 2012 17:35 UTC (Wed) by karim (subscriber, #114) [Link]

Highly likely. That's why JBQ had been suggesting lots of RAM. You might as well have the entire tree in the fs cache in RAM ...

Android 4.1 in AOSP

Posted Jul 11, 2012 17:35 UTC (Wed) by mikemol (subscriber, #83507) [Link]

Could be. I've got RAID-grade SATA disks, but I don't remember if I'm building on top of them right now or not. Either way, disk cache may mute the effect.

What do you have for RAM?