== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:56:29 (1741899389)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.50082 s, 41.9 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-ffff8800b62a4800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.17439
Iter 1/10: OSS cache speed: 2.07627
Iter 1/10: ladvise speed: 1.88387
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.54563
Iter 2/10: OSS cache speed: 2.27215
Iter 2/10: ladvise speed: 1.87534
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.99447
Iter 3/10: OSS cache speed: 2.47801
Iter 3/10: ladvise speed: 2.46326
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.42207
Iter 4/10: OSS cache speed: 2.26392
Iter 4/10: ladvise speed: 2.43113
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.29543
Iter 5/10: OSS cache speed: 2.41761
Iter 5/10: ladvise speed: 2.69795
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.26776
Iter 6/10: OSS cache speed: 2.82937
Iter 6/10: ladvise speed: 2.47944
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.44323
Iter 7/10: OSS cache speed: 2.47171
Iter 7/10: ladvise speed: 2.42934
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.62506
Iter 8/10: OSS cache speed: 2.65405
Iter 8/10: ladvise speed: 2.62384
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.65074
Iter 9/10: OSS cache speed: 2.75669
Iter 9/10: ladvise speed: 2.53649
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.73242
Iter 10/10: OSS cache speed: 2.58711
Iter 10/10: ladvise speed: 2.15378
Average uncached read: 2.31
Average speedup with OSS cached read:  2.48 = +7%
Average speedup with ladvise willread:  2.35 = +1%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0