Justin Hibbits
6260bfb087
powerpc: Optimize copyinstr() to avoid repeatedly mapping user strings ...
Currently copyinstr() uses fubyte() to read each byte from userspace.
However, this means that for each byte, it calls pmap_map_user_ptr() to
map the string into memory. This is needlessly wasteful, since the
string will rarely ever cross a segment boundary. Instead, map a
segment at a time, and copy as much from that segment as possible at a
time.
Measured with the HPT pmap on powerpc64, this saves roughly 8% time on
buildkernel, and 5% on buildworld, in wallclock time.
2020-12-30 23:45:35 +01:00
2020-12-27 12:59:33 +02:00
2020-12-30 16:11:02 +00:00
2020-12-30 13:56:11 +01:00
2020-12-27 12:57:26 +02:00
2020-12-25 20:20:54 +01:00
2020-12-08 18:00:58 +00:00
2020-12-27 12:57:27 +02:00
2020-12-30 16:11:02 +00:00
2020-12-28 14:37:09 +01:00
2020-12-11 00:42:53 +00:00
2020-12-01 17:04:46 +00:00
2020-12-30 09:56:24 -08:00
2020-10-10 07:18:51 +00:00
2020-12-29 13:47:36 +00:00
2020-12-23 14:37:05 -04:00
2020-12-29 14:29:59 +00:00
2020-12-28 14:12:41 +01:00
2020-12-23 15:40:14 -04:00
2020-12-28 21:38:20 +00:00
2020-09-17 22:29:38 +00:00
2020-10-10 21:48:06 +00:00
2020-12-25 19:47:45 +01:00
2020-12-28 19:36:51 -05:00
2020-12-29 18:01:57 +01:00
2020-11-04 12:07:33 +00:00
2020-12-26 11:27:38 +00:00
2020-12-26 22:51:02 +00:00
2020-12-25 11:33:17 +00:00
2020-10-16 11:27:01 +00:00
2020-12-23 12:03:21 +01:00
2020-09-01 21:19:14 +00:00
2020-09-01 21:25:39 +00:00
2020-09-01 21:25:39 +00:00
2020-11-18 04:35:49 +00:00
2020-09-01 22:14:52 +00:00
2020-11-02 10:44:29 +00:00
2020-11-25 00:10:54 +00:00
2020-12-30 23:45:35 +01:00
2020-12-18 20:41:23 +00:00
2020-12-23 13:42:55 -08:00
2020-12-17 18:52:04 +00:00
2020-12-29 11:38:34 -06:00
2020-10-01 01:10:51 +00:00
2020-09-02 09:20:40 +00:00
2020-12-30 13:22:04 +01:00
2020-12-23 11:16:40 -05:00
2020-12-27 17:01:44 -05:00
2020-12-23 12:45:15 +02:00
2020-09-01 22:13:28 +00:00
2020-12-30 11:18:26 +01:00
6260bfb087