| commit | 242fd95fc3bfeffee12345fa80766370654d2109 | |
| author | Imre Vadász <imre@vdsz.com> | |
| Thu, 31 Aug 2017 20:43:41 +0000 (31 22:43 +0200) | ||
| committer | Imre Vadász <imre@vdsz.com> | |
| Fri, 1 Sep 2017 21:07:09 +0000 (1 23:07 +0200) | ||
| tree | 4c8dbfcbc54e45059efef3dd41fb9e0fc0f2c318 | treesnapshot (tar.gz zip) |
| parent | cf6b3eb151560a2fd7f82351b20f7c317617741e | commitdiff |
pc64: Turn CLK_USE_* flags into tunable, skip code when results are unused.
* This should save ca. 1s during bootup, by skipping the i8254 and TSC
calibration based on the RTC, when we aren't actually using the result
in any way.
* For now, continue running that calibration code, when booting in verbose
mode, to keep printing these potentially useful calibration results.
* Setting the hw.calibrate_timers_with_rtc tunable to 1, will enable this
calibration code, and use those results for the i8254 and TSC frequencies.
* This should save ca. 1s during bootup, by skipping the i8254 and TSC
calibration based on the RTC, when we aren't actually using the result
in any way.
* For now, continue running that calibration code, when booting in verbose
mode, to keep printing these potentially useful calibration results.
* Setting the hw.calibrate_timers_with_rtc tunable to 1, will enable this
calibration code, and use those results for the i8254 and TSC frequencies.
| sys/config/LINT64 | diffblobblamehistory | |
| sys/platform/pc64/isa/clock.c | diffblobblamehistory |