== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:27:20 (1773221240)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.5959 s, 6.7 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-ffff9481455ad000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.354881
Iter 1/10: OSS cache speed: 0.416431
Iter 1/10: ladvise speed: 0.397737
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.287998
Iter 2/10: OSS cache speed: 0.389317
Iter 2/10: ladvise speed: 0.341616
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.364104
Iter 3/10: OSS cache speed: 0.362833
Iter 3/10: ladvise speed: 0.356372
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.374473
Iter 4/10: OSS cache speed: 0.389134
Iter 4/10: ladvise speed: 0.379703
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.332227
Iter 5/10: OSS cache speed: 0.402277
Iter 5/10: ladvise speed: 0.413259
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.343626
Iter 6/10: OSS cache speed: 0.33966
Iter 6/10: ladvise speed: 0.348994
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.33763
Iter 7/10: OSS cache speed: 0.357518
Iter 7/10: ladvise speed: 0.315129
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.343431
Iter 8/10: OSS cache speed: 0.340318
Iter 8/10: ladvise speed: 0.373628
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.39799
Iter 9/10: OSS cache speed: 0.381698
Iter 9/10: ladvise speed: 0.385448
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.339221
Iter 10/10: OSS cache speed: 0.405321
Iter 10/10: ladvise speed: 0.459783
Average uncached read: .34
Average speedup with OSS cached read:  .37 = +8%
Average speedup with ladvise willread:  .37 = +8%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0