== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:50:59 (1761313859)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 1.98991 s, 52.7 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: 0.816299
Iter 1/10: OSS cache speed: 0.777965
Iter 1/10: ladvise speed: 0.732983
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.790187
Iter 2/10: OSS cache speed: 0.783788
Iter 2/10: ladvise speed: 0.652514
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.71665
Iter 3/10: OSS cache speed: 0.711961
Iter 3/10: ladvise speed: 0.700544
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.702884
Iter 4/10: OSS cache speed: 0.725653
Iter 4/10: ladvise speed: 0.67333
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.755099
Iter 5/10: OSS cache speed: 0.695298
Iter 5/10: ladvise speed: 0.765135
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.675558
Iter 6/10: OSS cache speed: 0.696406
Iter 6/10: ladvise speed: 0.829875
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.749598
Iter 7/10: OSS cache speed: 0.695208
Iter 7/10: ladvise speed: 0.816155
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.789955
Iter 8/10: OSS cache speed: 0.765705
Iter 8/10: ladvise speed: 0.693624
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.668934
Iter 9/10: OSS cache speed: 0.74486
Iter 9/10: ladvise speed: 0.713081
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.713024
Iter 10/10: OSS cache speed: 0.686612
Iter 10/10: ladvise speed: 0.691136
Average uncached read: .73
Average speedup with OSS cached read:  .72 = +-1.36%
Average speedup with ladvise willread:  .72 = +-1.36%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 21871: �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