== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:50:58 (1761317458)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 2.32005 s, 45.2 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: 0.530792
Iter 1/10: OSS cache speed: 0.660374
Iter 1/10: ladvise speed: 0.739451
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.646361
Iter 2/10: OSS cache speed: 0.642046
Iter 2/10: ladvise speed: 0.675176
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.735061
Iter 3/10: OSS cache speed: 0.74548
Iter 3/10: ladvise speed: 0.68369
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.662241
Iter 4/10: OSS cache speed: 0.719262
Iter 4/10: ladvise speed: 0.719411
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.648253
Iter 5/10: OSS cache speed: 0.546455
Iter 5/10: ladvise speed: 0.688646
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.659545
Iter 6/10: OSS cache speed: 0.742627
Iter 6/10: ladvise speed: 0.68989
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.629679
Iter 7/10: OSS cache speed: 0.669106
Iter 7/10: ladvise speed: 0.66018
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.698636
Iter 8/10: OSS cache speed: 0.774379
Iter 8/10: ladvise speed: 0.742694
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.819361
Iter 9/10: OSS cache speed: 0.752696
Iter 9/10: ladvise speed: 0.777337
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.834585
Iter 10/10: OSS cache speed: 0.926113
Iter 10/10: ladvise speed: 0.900806
Average uncached read: .68
Average speedup with OSS cached read:  .71 = +4.41%
Average speedup with ladvise willread:  .72 = +5.88%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 21871:  \G‰¦U: < 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