== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:43:19 (1786192999)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.12208 s, 17.1 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-ffff899a5154f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.98368
Iter 1/10: OSS cache speed: 1.0525
Iter 1/10: ladvise speed: 1.13097
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.63071
Iter 2/10: OSS cache speed: 1.78257
Iter 2/10: ladvise speed: 1.747
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.61865
Iter 3/10: OSS cache speed: 1.85555
Iter 3/10: ladvise speed: 2.06086
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.3069
Iter 4/10: OSS cache speed: 2.53841
Iter 4/10: ladvise speed: 2.35062
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.05322
Iter 5/10: OSS cache speed: 2.2878
Iter 5/10: ladvise speed: 2.56133
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.28311
Iter 6/10: OSS cache speed: 2.26859
Iter 6/10: ladvise speed: 2.27848
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.23048
Iter 7/10: OSS cache speed: 2.31656
Iter 7/10: ladvise speed: 2.26914
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.08404
Iter 8/10: OSS cache speed: 2.42477
Iter 8/10: ladvise speed: 2.29065
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.16648
Iter 9/10: OSS cache speed: 2.39384
Iter 9/10: ladvise speed: 2.40508
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.19731
Iter 10/10: OSS cache speed: 2.3427
Iter 10/10: ladvise speed: 2.39356
Average uncached read: 1.95
Average speedup with OSS cached read:  2.12 = +8%
Average speedup with ladvise willread:  2.14 = +9%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0