Comments on: /dev/upmap and /dev/kpmap added https://www.dragonflydigest.com/2014/10/17/devupmap-and-devkpmap-added/ A running description of activity related to DragonFly BSD. Sat, 18 Oct 2014 09:28:26 +0000 hourly 1 https://wordpress.org/?v=6.9.4 By: Sunny https://www.dragonflydigest.com/2014/10/17/devupmap-and-devkpmap-added/comment-page-1/#comment-290065 Sat, 18 Oct 2014 09:28:26 +0000 http://www.dragonflydigest.com/?p=14909#comment-290065 As far as I understand, this optimizes repetition of system calls like getpid(), clock_gettime() and setproctitle().

Since all the data is mmaped for the process, all it takes is just a simple memory read to access data – which is obviously much faster than the usual syscall interface.

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