== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:51:11 (1789318271)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.56408 s, 16.0 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-ffff8caa0ccb9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.12503
Iter 1/10: OSS cache speed: 2.30643
Iter 1/10: ladvise speed: 2.08294
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.23299
Iter 2/10: OSS cache speed: 2.11766
Iter 2/10: ladvise speed: 2.20277
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.21579
Iter 3/10: OSS cache speed: 2.23338
Iter 3/10: ladvise speed: 2.09773
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.17071
Iter 4/10: OSS cache speed: 2.23947
Iter 4/10: ladvise speed: 2.31215
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.16193
Iter 5/10: OSS cache speed: 2.30275
Iter 5/10: ladvise speed: 2.28768
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.1391
Iter 6/10: OSS cache speed: 2.14669
Iter 6/10: ladvise speed: 2.1665
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.03942
Iter 7/10: OSS cache speed: 2.0897
Iter 7/10: ladvise speed: 2.20485
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.22435
Iter 8/10: OSS cache speed: 2.25074
Iter 8/10: ladvise speed: 2.34545
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.34378
Iter 9/10: OSS cache speed: 2.2435
Iter 9/10: ladvise speed: 2.22368
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.24049
Iter 10/10: OSS cache speed: 2.21686
Iter 10/10: ladvise speed: 2.09683
Average uncached read: 2.18
Average speedup with OSS cached read:  2.21 = +1%
Average speedup with ladvise willread:  2.20 = +0%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0