== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:24:31 (1787844271)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 17.1223 s, 6.1 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-ffff8a79489ee800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.338637
Iter 1/10: OSS cache speed: 0.328935
Iter 1/10: ladvise speed: 0.376443
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.34163
Iter 2/10: OSS cache speed: 0.346396
Iter 2/10: ladvise speed: 0.340894
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.350582
Iter 3/10: OSS cache speed: 0.322853
Iter 3/10: ladvise speed: 0.308587
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.281427
Iter 4/10: OSS cache speed: 0.320765
Iter 4/10: ladvise speed: 0.304118
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.334819
Iter 5/10: OSS cache speed: 0.377621
Iter 5/10: ladvise speed: 0.329358
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.332018
Iter 6/10: OSS cache speed: 0.35215
Iter 6/10: ladvise speed: 0.323724
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.353052
Iter 7/10: OSS cache speed: 0.378626
Iter 7/10: ladvise speed: 0.278359
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.284602
Iter 8/10: OSS cache speed: 0.340274
Iter 8/10: ladvise speed: 0.385785
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.332956
Iter 9/10: OSS cache speed: 0.368701
Iter 9/10: ladvise speed: 0.34513
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.354867
Iter 10/10: OSS cache speed: 0.393145
Iter 10/10: ladvise speed: 0.296882
Average uncached read: .33
Average speedup with OSS cached read:  .35 = +6%
Average speedup with ladvise willread:  .32 = +-3%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0