Revision ca71ba4d0cfcf5f7a8e9b24339547b5a72299f80 authored by John Baldwin on 26 January 2010, 20:58:09 UTC, committed by John Baldwin on 26 January 2010, 20:58:09 UTC
Optimize the cache flushing done when changing caching attributes of pages by doing nothing for CPUs that support self-snooping and using CLFLUSH instead of a full cache invalidate when possible. - On i386 take care of possible mappings of the page by sf buffer by utilizing the mapping for clflush, otherwise map the page transiently. Amd64 uses the direct map. - Do not use CLFLUSH on Intel CPUs due to problems with flushing the local APIC range by default. This can be further controlled via the hw.clflush_disable loader tunable. A setting of 1 disables the use of CLFLUSH. A setting of 0 allows CLFLUSH to be used for Intel CPUs when CPUID_SS is not present. Approved by: re (kib)
1 parent a6a19cb
| File | Mode | Size |
|---|---|---|
| db_access.c | -rw-r--r-- | 2.5 KB |
| db_access.h | -rw-r--r-- | 1.3 KB |
| db_break.c | -rw-r--r-- | 7.5 KB |
| db_break.h | -rw-r--r-- | 2.0 KB |
| db_capture.c | -rw-r--r-- | 10.1 KB |
| db_command.c | -rw-r--r-- | 16.2 KB |
| db_command.h | -rw-r--r-- | 1.5 KB |
| db_examine.c | -rw-r--r-- | 7.2 KB |
| db_expr.c | -rw-r--r-- | 4.6 KB |
| db_input.c | -rw-r--r-- | 7.8 KB |
| db_lex.c | -rw-r--r-- | 5.8 KB |
| db_lex.h | -rw-r--r-- | 1.8 KB |
| db_main.c | -rw-r--r-- | 5.8 KB |
| db_output.c | -rw-r--r-- | 6.7 KB |
| db_output.h | -rw-r--r-- | 1.4 KB |
| db_print.c | -rw-r--r-- | 1.9 KB |
| db_ps.c | -rw-r--r-- | 10.8 KB |
| db_run.c | -rw-r--r-- | 8.5 KB |
| db_script.c | -rw-r--r-- | 15.4 KB |
| db_sym.c | -rw-r--r-- | 7.6 KB |
| db_sym.h | -rw-r--r-- | 3.5 KB |
| db_textdump.c | -rw-r--r-- | 16.7 KB |
| db_thread.c | -rw-r--r-- | 5.0 KB |
| db_variables.c | -rw-r--r-- | 3.3 KB |
| db_variables.h | -rw-r--r-- | 1.7 KB |
| db_watch.c | -rw-r--r-- | 7.0 KB |
| db_watch.h | -rw-r--r-- | 1.4 KB |
| db_write_cmd.c | -rw-r--r-- | 2.1 KB |
| ddb.h | -rw-r--r-- | 7.3 KB |
Computing file changes ...
