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| author | mav <mav@FreeBSD.org> | 2011-06-03 07:25:36 +0000 |
|---|---|---|
| committer | mav <mav@FreeBSD.org> | 2011-06-03 07:25:36 +0000 |
| commit | 73b08d6ce20693135690240bf465639a15556c86 (patch) | |
| tree | c24493b97a95a1921264302247e5be0edc828d1e /sys/cam | |
| parent | a825a0b2413a0f6ead220d473bf893b5232a2476 (diff) | |
| download | FreeBSD-src-73b08d6ce20693135690240bf465639a15556c86.zip FreeBSD-src-73b08d6ce20693135690240bf465639a15556c86.tar.gz | |
Increase maximum supported number of ranges per TRIM command from 256 to 512
to use full potential of Intel X25-M SSDs. On synthetic test with 32K ranges
it gives about 20% speedup, which probably costs more then 2K of RAM.
Diffstat (limited to 'sys/cam')
| -rw-r--r-- | sys/cam/ata/ata_da.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/cam/ata/ata_da.c b/sys/cam/ata/ata_da.c index f918956..8e93302 100644 --- a/sys/cam/ata/ata_da.c +++ b/sys/cam/ata/ata_da.c @@ -114,9 +114,9 @@ struct disk_params { u_int64_t sectors; /* Total number sectors */ }; -#define TRIM_MAX_BLOCKS 4 +#define TRIM_MAX_BLOCKS 8 #define TRIM_MAX_RANGES (TRIM_MAX_BLOCKS * 64) -#define TRIM_MAX_BIOS (TRIM_MAX_RANGES * 8) +#define TRIM_MAX_BIOS (TRIM_MAX_RANGES * 4) struct trim_request { uint8_t data[TRIM_MAX_RANGES * 8]; struct bio *bps[TRIM_MAX_BIOS]; |
