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7457840230
Booting FreeBSD on an EC2 c5.xlarge instance, the loader "twiddles" 810 times over the course of 510 ms, a rate of 1.59 kHz. Even accepting that many systems are slower than this particular VM and will take longer to boot (especially if using spinning-rust disks), this seems like an unhelpfully large amount of twiddling when compared to the ~60 Hz frame rate of many displays; printing the twiddles also consumes roughly 10% of the boot time on the aforementioned VM. Setting the default globaldiv to 16 dramatically reduces the time spent printing twiddles to the console while still twiddling at roughly 100 Hz; this should be ample even for systems which take longer to boot and consequently twiddle slower. Note that this can adjusted via the twiddle_divisor variable in loader.conf, but that file is not processed until nearly halfway through the loader's runtime. Reviewed by: allanjude, jrtc27, kevans MFC after: 1 week Sponsored by: https://www.patreon.com/cperciva Differential Revision: <https://reviews.freebsd.org/D32163> |
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| .. | ||
| arm | ||
| arm64 | ||
| common | ||
| defaults | ||
| efi | ||
| fdt | ||
| ficl | ||
| ficl32 | ||
| fonts | ||
| forth | ||
| i386 | ||
| images | ||
| kshim | ||
| liblua | ||
| liblua32 | ||
| libofw | ||
| libsa | ||
| libsa32 | ||
| lua | ||
| man | ||
| mips | ||
| powerpc | ||
| uboot | ||
| usb | ||
| userboot | ||
| defs.mk | ||
| fdt.mk | ||
| ficl.mk | ||
| loader.mk | ||
| lua.mk | ||
| Makefile | ||
| Makefile.amd64 | ||
| Makefile.inc | ||
| uboot.mk | ||
| veriexec.mk | ||