== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:39:04 (1786037944)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.0872 s, 8.0 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=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff97cf44b2f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.21382
Iter 1/10: OSS cache speed: 0.235813
Iter 1/10: ladvise speed: 0.254009
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.233833
Iter 2/10: OSS cache speed: 0.236107
Iter 2/10: ladvise speed: 0.235397
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.21425
Iter 3/10: OSS cache speed: 0.25043
Iter 3/10: ladvise speed: 0.203106
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.212257
Iter 4/10: OSS cache speed: 0.235498
Iter 4/10: ladvise speed: 0.243648
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.204213
Iter 5/10: OSS cache speed: 0.225404
Iter 5/10: ladvise speed: 0.26343
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.196774
Iter 6/10: OSS cache speed: 0.220418
Iter 6/10: ladvise speed: 0.221899
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.234091
Iter 7/10: OSS cache speed: 0.230513
Iter 7/10: ladvise speed: 0.232663
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.209649
Iter 8/10: OSS cache speed: 0.288208
Iter 8/10: ladvise speed: 0.238695
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.270591
Iter 9/10: OSS cache speed: 0.237444
Iter 9/10: ladvise speed: 0.296024
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.258186
Iter 10/10: OSS cache speed: 0.239749
Iter 10/10: ladvise speed: 0.26577
Average uncached read: .22
Average speedup with OSS cached read:  .23 = +4%
Average speedup with ladvise willread:  .24 = +9%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0