- 59 segundos Tiempo de arranque de Ubuntu 9.10 Karmic Koala
- 24 segundos Tiempo de arranque de Ubuntu 10.04 Lucid Lynx Alpha
Saturday, July 24, 2010
Boot time of Ubuntu versions
Tests realizados a un Dell Mini 9 con procesador Intel Atom N270 @ 1,6GHz:
Ubuntu 10.04 Alpha 1 was released last week and while it did not bring any major features yet for this Long-Term Support release of Ubuntu Linux to be released in April of 2010, it began to introduce some underlying changes like the switch to the Linux 2.6.32 kernel, X Server 1.7, and the complete removal of HAL. Our early benchmarks of Ubuntu 10.04 show that there are some negative performance regressions right off the bat, but that is from within the Linux desktop. One area that Canonical is focusing upon in particular with Ubuntu 10.04 LTS is speeding up the boot process, so we decided to provide some benchmarks there too.
For Ubuntu 10.04 in fact they would like a 10 second boot time for Intel netbook hardware. Not only are they speeding up the boot process, but they are also working to beautify the boot process with Plymouth (video). For this article we checked out the boot performance with a Samsung NC10 that had an after-market OCZ SSD and 2GB of RAM along with a stock Dell Mini 9. Starting off, below are the Dell Mini 9 boot chart results for clean installations of Ubuntu 9.10 and then Ubuntu 10.04 Alpha 1.
The reported boot time for Ubuntu 9.10 on the Mini 9 was 59 seconds, but only 24 seconds in comparison for Ubuntu 10.04 Alpha 1. In the past, we had been able to boot Ubuntu 9.10 faster, but these are clean Bootchart results from Ubuntu 9.10 on a stock installation. The peak disk throughput was also higher under Ubuntu Lucid with a speed of 84MB/s compared to 79MB/s with Karmic. With Ubuntu 10.04 Alpha 1 there are less process starting up (such as with HAL being completely nuked) and the processes that are running are running faster. Also, we were measuring the boot chart results for each system and each Ubuntu release with an automated log-in to the GNOME desktop rather than the log-in screen. Below are the charts for the Samsung NC10.
For the Samsung NC10 the Karmic number was 55 seconds compared to 23 seconds with Lucid. The disk throughput for this OCZ Core Series V2 SSD was also noticeably better with Lucid at a peak of 122MB/s compared to 55MB/s with the stable Karmic.
Also surfacing this month is a new kernel (though it is currently based upon Linux 2.6.31 for Ubuntu 9.10) that pulls in more of Intel's Moblin speed patches from their kernel. As most know, Moblin 2 boots extremely fast. As is described on the mailing list, these kernel patches from Moblin remove a time delay in waiting for all devices before mounting the root file-system, KMS after SATA in drivers, don't blank the display, in the kernel DRM removing a root requirement for a DRM ioctl, fixing a vblank delay on pipe disable, make the device initialization go a-synchronously, and add an EDID cash for connected displays. We have tested out this kernel with the Moblin patches on Ubuntu 9.10 and it booted three seconds faster compared to the stock Karmic kernel.