== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:13:45 (1787872425)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4152 s, 8.4 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-ffff969c91077800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.333747
Iter 1/10: OSS cache speed: 0.304689
Iter 1/10: ladvise speed: 0.351939
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.313133
Iter 2/10: OSS cache speed: 0.357726
Iter 2/10: ladvise speed: 0.317294
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.38586
Iter 3/10: OSS cache speed: 0.39969
Iter 3/10: ladvise speed: 0.317641
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.380988
Iter 4/10: OSS cache speed: 0.331274
Iter 4/10: ladvise speed: 0.378348
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.297963
Iter 5/10: OSS cache speed: 0.340461
Iter 5/10: ladvise speed: 0.333603
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.360291
Iter 6/10: OSS cache speed: 0.354976
Iter 6/10: ladvise speed: 0.365712
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.37089
Iter 7/10: OSS cache speed: 0.330507
Iter 7/10: ladvise speed: 0.354625
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.359859
Iter 8/10: OSS cache speed: 0.369139
Iter 8/10: ladvise speed: 0.366959
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.368674
Iter 9/10: OSS cache speed: 0.315195
Iter 9/10: ladvise speed: 0.38502
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.36485
Iter 10/10: OSS cache speed: 0.380308
Iter 10/10: ladvise speed: 0.355132
Average uncached read: .35
Average speedup with OSS cached read:  .34 = +-2%
Average speedup with ladvise willread:  .35 = +0%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0