== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:48:48 (1749606528)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.27769 s, 46.0 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-ffff8800b0380000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.39529
Iter 1/10: OSS cache speed: 1.54696
Iter 1/10: ladvise speed: 1.47515
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.67059
Iter 2/10: OSS cache speed: 2.72382
Iter 2/10: ladvise speed: 2.96458
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.14073
Iter 3/10: OSS cache speed: 2.29374
Iter 3/10: ladvise speed: 1.88902
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.8914
Iter 4/10: OSS cache speed: 1.80428
Iter 4/10: ladvise speed: 1.35825
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.35386
Iter 5/10: OSS cache speed: 1.76275
Iter 5/10: ladvise speed: 1.27804
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.14748
Iter 6/10: OSS cache speed: 1.18057
Iter 6/10: ladvise speed: 1.59851
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.50943
Iter 7/10: OSS cache speed: 2.15432
Iter 7/10: ladvise speed: 2.19348
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.04857
Iter 8/10: OSS cache speed: 2.44489
Iter 8/10: ladvise speed: 2.48734
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.6069
Iter 9/10: OSS cache speed: 2.65376
Iter 9/10: ladvise speed: 2.67381
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.6269
Iter 10/10: OSS cache speed: 2.38071
Iter 10/10: ladvise speed: 2.89245
Average uncached read: 1.93
Average speedup with OSS cached read:  2.09 = +8%
Average speedup with ladvise willread:  2.08 = +7%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0