== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:49:33 (1782866973)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.92597 s, 17.7 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-ffff9120058bf800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.77903
Iter 1/10: OSS cache speed: 1.7617
Iter 1/10: ladvise speed: 1.2001
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.08227
Iter 2/10: OSS cache speed: 1.08691
Iter 2/10: ladvise speed: 1.31028
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.28194
Iter 3/10: OSS cache speed: 2.01117
Iter 3/10: ladvise speed: 1.28413
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.35086
Iter 4/10: OSS cache speed: 0.99487
Iter 4/10: ladvise speed: 0.991208
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.01536
Iter 5/10: OSS cache speed: 0.962999
Iter 5/10: ladvise speed: 0.948211
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.33775
Iter 6/10: OSS cache speed: 0.985011
Iter 6/10: ladvise speed: 0.981714
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.989621
Iter 7/10: OSS cache speed: 0.975977
Iter 7/10: ladvise speed: 0.960612
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.954607
Iter 8/10: OSS cache speed: 0.990966
Iter 8/10: ladvise speed: 0.999844
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.980231
Iter 9/10: OSS cache speed: 0.971095
Iter 9/10: ladvise speed: 1.0656
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.976837
Iter 10/10: OSS cache speed: 0.976063
Iter 10/10: ladvise speed: 1.01753
Average uncached read: 1.27
Average speedup with OSS cached read:  1.17 = +-7%
Average speedup with ladvise willread:  1.07 = +-15%
Speedup with OSS cached read less than 20%,  got -7%. Skipping ladvise willread check.
fail_loc=0