== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:17:40 (1760127460)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.2737 s, 10.2 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-ffff9827917ba800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.460653
Iter 1/10: OSS cache speed: 0.436361
Iter 1/10: ladvise speed: 0.558796
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.502104
Iter 2/10: OSS cache speed: 0.638809
Iter 2/10: ladvise speed: 0.459365
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.472724
Iter 3/10: OSS cache speed: 0.408711
Iter 3/10: ladvise speed: 0.504166
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.474255
Iter 4/10: OSS cache speed: 0.543347
Iter 4/10: ladvise speed: 0.589382
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.542683
Iter 5/10: OSS cache speed: 0.613739
Iter 5/10: ladvise speed: 0.658372
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.633821
Iter 6/10: OSS cache speed: 0.692181
Iter 6/10: ladvise speed: 0.617382
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.537002
Iter 7/10: OSS cache speed: 0.579917
Iter 7/10: ladvise speed: 0.707837
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.590742
Iter 8/10: OSS cache speed: 0.682535
Iter 8/10: ladvise speed: 0.785393
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.743606
Iter 9/10: OSS cache speed: 1.01014
Iter 9/10: ladvise speed: 0.992061
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.21682
Iter 10/10: OSS cache speed: 1.45402
Iter 10/10: ladvise speed: 1.17949
Average uncached read: .61
Average speedup with OSS cached read:  .70 = +14%
Average speedup with ladvise willread:  .70 = +14%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0