4 ms·
yes, and return in MS-DOS era
by karavelov 11y ago
yes, and return in MS-DOS era
- mwcampbell 11y agoI don't understand. If bcantrill's description of VDSOs (buried in this presentation: https://www.youtube.com/watch?v=TrfD3pC0VSs https://www.youtube.com/watch?v=TrfD3pC0VSs) is accurate, then they're just a way to make certain syscalls faster, when syscalls are already fast enough.
- the8472 11y ago> when syscalls are already fast enough. they aren't. some syscalls get hammered so much by user space code that any overhead is too much overhead. especially with gettimeofday/clock_gettime which are used for timestamping and measuring intervals. you don't want overhead on your timing code.