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| author | jake <jake@FreeBSD.org> | 2002-02-26 02:37:43 +0000 |
|---|---|---|
| committer | jake <jake@FreeBSD.org> | 2002-02-26 02:37:43 +0000 |
| commit | 84d0ef926838761796ff63bde8d68c05472802ff (patch) | |
| tree | d8ea3450a12b7dc29b2c2a27cf4308cd1e81861f /sys/sparc64/include/tsb.h | |
| parent | aea627e8493eaf1a9d2b8b0789b453fd9afc5322 (diff) | |
| download | FreeBSD-src-84d0ef926838761796ff63bde8d68c05472802ff.zip FreeBSD-src-84d0ef926838761796ff63bde8d68c05472802ff.tar.gz | |
Allow the user tsb to span multiple pages. Make the default 2 pages for now
until we do some testing to see what's best. This gives a massive reduction
in system time for processes with a relatively large working set. The size
of the tsb directly affects the rss size that a user process can keep mapped.
When it starts to get full replacements occur and the process takes a lot of
soft vm faults. Increasing the default from 1 page to 2 gives the following
before and after numbers for compiling vfs_bio.c:
before:
14.27 real 6.56 user 5.69 sys
after:
8.57 real 6.11 user 1.62 sys
This should make self hosted builds more tolerable.
Diffstat (limited to 'sys/sparc64/include/tsb.h')
| -rw-r--r-- | sys/sparc64/include/tsb.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/sparc64/include/tsb.h b/sys/sparc64/include/tsb.h index 14593c9..4025112 100644 --- a/sys/sparc64/include/tsb.h +++ b/sys/sparc64/include/tsb.h @@ -32,7 +32,9 @@ #ifndef _MACHINE_TSB_H_ #define _MACHINE_TSB_H_ -#define TSB_BSHIFT PAGE_SHIFT_8K +#define TSB_PAGES_SHIFT (1) +#define TSB_PAGES (1 << TSB_PAGES_SHIFT) +#define TSB_BSHIFT (TSB_PAGES_SHIFT + PAGE_SHIFT) #define TSB_BSIZE (1UL << TSB_BSHIFT) #define TSB_SIZE (TSB_BSIZE / sizeof(struct tte)) #define TSB_BUCKET_SHIFT (2) |
