== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:38:51 (1789025931)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.0929 s, 10.4 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-ffff93914816c000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.341787
Iter 1/10: OSS cache speed: 0.349876
Iter 1/10: ladvise speed: 0.452848
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.40121
Iter 2/10: OSS cache speed: 0.447825
Iter 2/10: ladvise speed: 0.410961
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.397274
Iter 3/10: OSS cache speed: 0.422021
Iter 3/10: ladvise speed: 0.427478
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.411172
Iter 4/10: OSS cache speed: 0.493265
Iter 4/10: ladvise speed: 0.475044
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.390455
Iter 5/10: OSS cache speed: 0.434492
Iter 5/10: ladvise speed: 0.556743
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.498102
Iter 6/10: OSS cache speed: 0.467605
Iter 6/10: ladvise speed: 0.427914
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.463221
Iter 7/10: OSS cache speed: 0.500744
Iter 7/10: ladvise speed: 0.45454
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.463659
Iter 8/10: OSS cache speed: 0.467214
Iter 8/10: ladvise speed: 0.506855
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.49213
Iter 9/10: OSS cache speed: 0.450182
Iter 9/10: ladvise speed: 0.534768
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.475277
Iter 10/10: OSS cache speed: 0.475537
Iter 10/10: ladvise speed: 0.560265
Average uncached read: .43
Average speedup with OSS cached read:  .45 = +4%
Average speedup with ladvise willread:  .48 = +11%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0