== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:04:06 (1776204246)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 3.07698 s, 34.1 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=4
fail_loc=0x237
Asynchronous ladvise shouldn't wait
fail_loc=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.512383
Iter 1/10: OSS cache speed: 0.538207
Iter 1/10: ladvise speed: 0.574464
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.543217
Iter 2/10: OSS cache speed: 0.546471
Iter 2/10: ladvise speed: 0.551006
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.576585
Iter 3/10: OSS cache speed: 0.573111
Iter 3/10: ladvise speed: 0.576672
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.561022
Iter 4/10: OSS cache speed: 0.537814
Iter 4/10: ladvise speed: 0.514358
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.491596
Iter 5/10: OSS cache speed: 0.523599
Iter 5/10: ladvise speed: 0.556732
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.522529
Iter 6/10: OSS cache speed: 0.46434
Iter 6/10: ladvise speed: 0.536814
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.53964
Iter 7/10: OSS cache speed: 0.597152
Iter 7/10: ladvise speed: 0.576456
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.552363
Iter 8/10: OSS cache speed: 0.539657
Iter 8/10: ladvise speed: 0.531404
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.593709
Iter 9/10: OSS cache speed: 0.579135
Iter 9/10: ladvise speed: 0.518091
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.493643
Iter 10/10: OSS cache speed: 0.461632
Iter 10/10: ladvise speed: 0.489894
Average uncached read: .53
Average speedup with OSS cached read:  .53 = +0%
Average speedup with ladvise willread:  .54 = +1.88%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 21886: €UĆU: < 20 : syntax error: operand expected (error token is "< 20 ")
lfs ladvise: cannot give advice: Unknown error 524 (524)
ladvise: cannot give advice 'dontneed' to file '/mnt/lustre/f255a.sanity': Unknown error 524
osd-zfs does not support dontneed or drop_caches