== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:23:23 (1734431003)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.44553 s, 30.4 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-ffff8800aa44c800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.05167
Iter 1/10: OSS cache speed: 1.29801
Iter 1/10: ladvise speed: 1.47645
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.982921
Iter 2/10: OSS cache speed: 1.36128
Iter 2/10: ladvise speed: 1.13792
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.07019
Iter 3/10: OSS cache speed: 1.34837
Iter 3/10: ladvise speed: 1.7173
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.05834
Iter 4/10: OSS cache speed: 1.35269
Iter 4/10: ladvise speed: 1.40638
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.2501
Iter 5/10: OSS cache speed: 1.3402
Iter 5/10: ladvise speed: 1.17954
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.04229
Iter 6/10: OSS cache speed: 1.31006
Iter 6/10: ladvise speed: 1.86488
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.59109
Iter 7/10: OSS cache speed: 1.77164
Iter 7/10: ladvise speed: 1.65472
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.40737
Iter 8/10: OSS cache speed: 1.89489
Iter 8/10: ladvise speed: 2.38352
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.96013
Iter 9/10: OSS cache speed: 2.60681
Iter 9/10: ladvise speed: 2.87919
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.34771
Iter 10/10: OSS cache speed: 2.75215
Iter 10/10: ladvise speed: 2.47242
Average uncached read: 1.37
Average speedup with OSS cached read:  1.70 = +24%
Average speedup with ladvise willread:  1.81 = +32%
fail_loc=0