== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:45:27 (1786801527)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.5513 s, 9.1 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-ffff9c5787f63800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.371442
Iter 1/10: OSS cache speed: 0.329095
Iter 1/10: ladvise speed: 0.340446
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.31432
Iter 2/10: OSS cache speed: 0.245085
Iter 2/10: ladvise speed: 0.284862
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.273806
Iter 3/10: OSS cache speed: 0.283822
Iter 3/10: ladvise speed: 0.256008
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.254257
Iter 4/10: OSS cache speed: 0.273099
Iter 4/10: ladvise speed: 0.342745
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.378
Iter 5/10: OSS cache speed: 0.334062
Iter 5/10: ladvise speed: 0.373004
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.355841
Iter 6/10: OSS cache speed: 0.330504
Iter 6/10: ladvise speed: 0.382476
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.389301
Iter 7/10: OSS cache speed: 0.338071
Iter 7/10: ladvise speed: 0.400658
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.393386
Iter 8/10: OSS cache speed: 0.356644
Iter 8/10: ladvise speed: 0.409611
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.386869
Iter 9/10: OSS cache speed: 0.352948
Iter 9/10: ladvise speed: 0.371557
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.366245
Iter 10/10: OSS cache speed: 0.354123
Iter 10/10: ladvise speed: 0.399659
Average uncached read: .34
Average speedup with OSS cached read:  .31 = +-8%
Average speedup with ladvise willread:  .35 = +2%
Speedup with OSS cached read less than 20%,  got -8%. Skipping ladvise willread check.
fail_loc=0