== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:18:18 (1781212698)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.7308 s, 7.1 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-ffff8e12060c8000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.249099
Iter 1/10: OSS cache speed: 0.271632
Iter 1/10: ladvise speed: 0.278426
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.274417
Iter 2/10: OSS cache speed: 0.251477
Iter 2/10: ladvise speed: 0.228914
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.22423
Iter 3/10: OSS cache speed: 0.250001
Iter 3/10: ladvise speed: 0.271573
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.296326
Iter 4/10: OSS cache speed: 0.257598
Iter 4/10: ladvise speed: 0.264931
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.255089
Iter 5/10: OSS cache speed: 0.287277
Iter 5/10: ladvise speed: 0.286656
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.296139
Iter 6/10: OSS cache speed: 0.2899
Iter 6/10: ladvise speed: 0.291737
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.270991
Iter 7/10: OSS cache speed: 0.27891
Iter 7/10: ladvise speed: 0.266672
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.249137
Iter 8/10: OSS cache speed: 0.329255
Iter 8/10: ladvise speed: 0.343339
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.294276
Iter 9/10: OSS cache speed: 0.277836
Iter 9/10: ladvise speed: 0.328523
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.312532
Iter 10/10: OSS cache speed: 0.332717
Iter 10/10: ladvise speed: 0.257224
Average uncached read: .27
Average speedup with OSS cached read:  .28 = +3%
Average speedup with ladvise willread:  .28 = +3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0