== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:29:59 (1733642999)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.36514 s, 44.3 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-ffff88012abfc800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.97907
Iter 1/10: OSS cache speed: 3.41739
Iter 1/10: ladvise speed: 3.01582
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 3.16463
Iter 2/10: OSS cache speed: 3.47796
Iter 2/10: ladvise speed: 3.28048
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 3.08903
Iter 3/10: OSS cache speed: 2.79605
Iter 3/10: ladvise speed: 2.90339
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 3.05864
Iter 4/10: OSS cache speed: 2.87436
Iter 4/10: ladvise speed: 2.35433
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.74467
Iter 5/10: OSS cache speed: 3.28263
Iter 5/10: ladvise speed: 3.22825
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 3.09264
Iter 6/10: OSS cache speed: 3.35268
Iter 6/10: ladvise speed: 3.44684
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 3.22441
Iter 7/10: OSS cache speed: 3.51107
Iter 7/10: ladvise speed: 3.52844
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.78545
Iter 8/10: OSS cache speed: 3.45166
Iter 8/10: ladvise speed: 3.19828
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.9934
Iter 9/10: OSS cache speed: 3.2803
Iter 9/10: ladvise speed: 3.40255
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 3.09837
Iter 10/10: OSS cache speed: 3.27988
Iter 10/10: ladvise speed: 3.47417
Average uncached read: 3.02
Average speedup with OSS cached read:  3.27 = +8%
Average speedup with ladvise willread:  3.18 = +5%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0