== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:29:20 (1767317360)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.0664 s, 10.4 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-ffff8f94c3224800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.529976
Iter 1/10: OSS cache speed: 0.498845
Iter 1/10: ladvise speed: 0.607269
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.611555
Iter 2/10: OSS cache speed: 0.494782
Iter 2/10: ladvise speed: 0.5347
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.619007
Iter 3/10: OSS cache speed: 0.596462
Iter 3/10: ladvise speed: 0.541743
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.41796
Iter 4/10: OSS cache speed: 0.563551
Iter 4/10: ladvise speed: 0.549095
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.553509
Iter 5/10: OSS cache speed: 0.605673
Iter 5/10: ladvise speed: 0.616053
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.506823
Iter 6/10: OSS cache speed: 0.548005
Iter 6/10: ladvise speed: 0.467017
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.508887
Iter 7/10: OSS cache speed: 0.529636
Iter 7/10: ladvise speed: 0.427422
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.540072
Iter 8/10: OSS cache speed: 0.502711
Iter 8/10: ladvise speed: 0.611313
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.612786
Iter 9/10: OSS cache speed: 0.598584
Iter 9/10: ladvise speed: 0.557084
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.569626
Iter 10/10: OSS cache speed: 0.570616
Iter 10/10: ladvise speed: 0.561255
Average uncached read: .54
Average speedup with OSS cached read:  .55 = +1%
Average speedup with ladvise willread:  .54 = +0%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0