== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:33:13 (1787387593)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.7182 s, 8.9 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-ffff9d7004d9b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.311654
Iter 1/10: OSS cache speed: 0.340848
Iter 1/10: ladvise speed: 0.423342
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.403301
Iter 2/10: OSS cache speed: 0.371672
Iter 2/10: ladvise speed: 0.406938
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.316555
Iter 3/10: OSS cache speed: 0.364241
Iter 3/10: ladvise speed: 0.332384
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.3576
Iter 4/10: OSS cache speed: 0.352121
Iter 4/10: ladvise speed: 0.417527
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.366072
Iter 5/10: OSS cache speed: 0.363483
Iter 5/10: ladvise speed: 0.313829
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.290614
Iter 6/10: OSS cache speed: 0.29511
Iter 6/10: ladvise speed: 0.423113
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.317584
Iter 7/10: OSS cache speed: 0.323845
Iter 7/10: ladvise speed: 0.329981
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.316068
Iter 8/10: OSS cache speed: 0.321894
Iter 8/10: ladvise speed: 0.352552
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.264865
Iter 9/10: OSS cache speed: 0.354821
Iter 9/10: ladvise speed: 0.363709
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.295297
Iter 10/10: OSS cache speed: 0.280287
Iter 10/10: ladvise speed: 0.316994
Average uncached read: .32
Average speedup with OSS cached read:  .33 = +3%
Average speedup with ladvise willread:  .36 = +12%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0