== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:47:00 (1787302020)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.8463 s, 8.2 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-ffff90b002e41000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.40386
Iter 1/10: OSS cache speed: 0.386661
Iter 1/10: ladvise speed: 0.409923
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.364677
Iter 2/10: OSS cache speed: 0.435541
Iter 2/10: ladvise speed: 0.440067
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.395731
Iter 3/10: OSS cache speed: 0.414983
Iter 3/10: ladvise speed: 0.403413
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.384689
Iter 4/10: OSS cache speed: 0.420421
Iter 4/10: ladvise speed: 0.413164
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.342531
Iter 5/10: OSS cache speed: 0.410688
Iter 5/10: ladvise speed: 0.45397
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.362693
Iter 6/10: OSS cache speed: 0.416832
Iter 6/10: ladvise speed: 0.417587
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.408215
Iter 7/10: OSS cache speed: 0.410776
Iter 7/10: ladvise speed: 0.412286
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.312662
Iter 8/10: OSS cache speed: 0.278581
Iter 8/10: ladvise speed: 0.465165
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.459587
Iter 9/10: OSS cache speed: 0.470546
Iter 9/10: ladvise speed: 0.464783
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.381778
Iter 10/10: OSS cache speed: 0.486917
Iter 10/10: ladvise speed: 0.46512
Average uncached read: .38
Average speedup with OSS cached read:  .41 = +7%
Average speedup with ladvise willread:  .43 = +13%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0