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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 11:37, 10 June 2014
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A rough idea of what we are seeing currently, as well as empirical hypotheses (Have i found my 5 seconds yet?): | A rough idea of what we are seeing currently, as well as empirical hypotheses (Have i found my 5 seconds yet?): | ||
* B2G starts after roughly 8s of "stuff" | * B2G starts after roughly 8s of mysterious "stuff" | ||
* It has been noted that time between 5s and 8s is likely script execution up | * It has been noted that time between 5s and 8s is likely script execution up until |class_start main| in the init.rc | ||
* Vertical comes up around 16s, although I feel like some time as been lost... (by stopwatch it seems longer than that) | * Vertical comes up around 16s, although I feel like some time as been lost... (by stopwatch it seems longer than that) | ||
* As well it seems init is only really alive at 4 seconds anyway (based on inserted kernel log output) | * As well it seems init is only really alive at 4 seconds anyway (based on inserted kernel log output) | ||
* As such it is likely that | * As such it is likely that | ||
** 3.5s = bootloader + kernel | ** 3.5s = bootloader + kernel | ||
** 0s = kernel timing initialized | ** 0s = kernel timing initialized | ||
**~4.5s = init main | **~4.5s = init main | ||
** 7~8s = B2G | ** 7~8s = B2G | ||
** ~14s = (Nuwa) | ** ~14s = (Nuwa) | ||
** ~16s = Vertical | ** ~16s = Vertical | ||
Of course, more concrete data will be explored later, but that is the general gist of | Of course, more concrete data will be explored later, but that is the general gist of things | ||
==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] | ||