== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:44:12 (1782362652)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.1359 s, 20.4 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-ffff8ef98984a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.04872
Iter 1/10: OSS cache speed: 2.24574
Iter 1/10: ladvise speed: 1.97577
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.06914
Iter 2/10: OSS cache speed: 2.07869
Iter 2/10: ladvise speed: 2.09274
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.08932
Iter 3/10: OSS cache speed: 2.03494
Iter 3/10: ladvise speed: 2.06415
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.10118
Iter 4/10: OSS cache speed: 2.00941
Iter 4/10: ladvise speed: 2.0581
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.93276
Iter 5/10: OSS cache speed: 2.01737
Iter 5/10: ladvise speed: 1.53715
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.888996
Iter 6/10: OSS cache speed: 1.13557
Iter 6/10: ladvise speed: 2.00243
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.04421
Iter 7/10: OSS cache speed: 2.10856
Iter 7/10: ladvise speed: 2.05236
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.0899
Iter 8/10: OSS cache speed: 1.98206
Iter 8/10: ladvise speed: 1.99247
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.12525
Iter 9/10: OSS cache speed: 1.84766
Iter 9/10: ladvise speed: 1.39555
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.56591
Iter 10/10: OSS cache speed: 1.21661
Iter 10/10: ladvise speed: 1.81455
Average uncached read: 1.89
Average speedup with OSS cached read:  1.86 = +-1%
Average speedup with ladvise willread:  1.89 = +0%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0