== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:20:07 (1776201607)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 2.43684 s, 43.0 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: 0.717624
Iter 1/10: OSS cache speed: 0.688683
Iter 1/10: ladvise speed: 0.671773
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.751614
Iter 2/10: OSS cache speed: 0.726376
Iter 2/10: ladvise speed: 0.618128
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.728794
Iter 3/10: OSS cache speed: 0.517574
Iter 3/10: ladvise speed: 0.59073
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.597955
Iter 4/10: OSS cache speed: 0.75874
Iter 4/10: ladvise speed: 0.568992
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.696346
Iter 5/10: OSS cache speed: 0.716362
Iter 5/10: ladvise speed: 0.73429
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.674352
Iter 6/10: OSS cache speed: 0.710975
Iter 6/10: ladvise speed: 0.701098
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.653346
Iter 7/10: OSS cache speed: 0.713945
Iter 7/10: ladvise speed: 0.624654
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.69602
Iter 8/10: OSS cache speed: 0.763071
Iter 8/10: ladvise speed: 0.688012
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.714655
Iter 9/10: OSS cache speed: 0.708331
Iter 9/10: ladvise speed: 0.689011
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.661392
Iter 10/10: OSS cache speed: 0.702321
Iter 10/10: ladvise speed: 0.699328
Average uncached read: .68
Average speedup with OSS cached read:  .70 = +2.94%
Average speedup with ladvise willread:  .65 = +-4.41%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 21886: P��t�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