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Firefox OS/Performance/Boot Sequence Optimization: Difference between revisions
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Firefox OS/Performance/Boot Sequence Optimization (view source)
Revision as of 05:27, 24 June 2014
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=== Data === | === Data === | ||
Data collected are organized as follows: | |||
<pre> | <pre> | ||
repo-state -> Information about the state of the source tree that applies to this experiment. | repo-state -> Information about the state of the source tree that applies to this experiment. | ||
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</pre> | </pre> | ||
[http://people.mozilla.org/~jbailey/v10G-first-baselines/ Old Baseline statistics] | |||
These results were collected but then i decided to base my experiments on a slightly newer baseimage | |||
[http://people.mozilla.org/~jbailey/v121-2-baseline/ Baseline statistics] | |||
This is data collected for the purposes of establishing a baseline. | |||
For this and future data collection, at least 30 trials will be recorded. Also in the root directory there are a few randomly selected trials for which charts were generated for quick reference. | For this and future data collection, at least 30 trials will be recorded. Also in the root directory there are a few randomly selected trials for which charts were generated for quick reference. | ||
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Of course, more concrete data will be explored later, but that is the general gist of things | Of course, more concrete data will be explored later, but that is the general gist of things | ||
[http://people.mozilla.org/~jbailey/v121-2-premainb2g/ Experiment #1] | |||
In this simple experiment only a change to "init.rc" was made. By default b2g was started along with a host of other services in the same class "main". For this experiment B2G was moved into its own class that was run just before main. As expected this did not have significant effect however. Quantitatively one does notice a difference in the bootchart images reflecting B2G being started slightly earlier. Of note is that as a result of this change, there is a more pronounced black screen between the T2mobile and the "Mozilla Developer Network" logos. Dave Huseby has noted in the past that such a noticeable black screen exists in other devices. | |||
The next step is to determine if there are any dependencies such that B2G can't be moved even further back (and if this is done, take care of the black screen somehow) | |||
==References== | ==References== | ||
[https://developer.mozilla.org/en-US/Firefox_OS/Platform/Architecture#Firefox_OS_bootup_procedure Firefox OS Bootup Procedure] | [https://developer.mozilla.org/en-US/Firefox_OS/Platform/Architecture#Firefox_OS_bootup_procedure Firefox OS Bootup Procedure] | ||