== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:30:18 (1786404618)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.5956 s, 7.7 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-ffff8db78bba6000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.531564
Iter 1/10: OSS cache speed: 0.526844
Iter 1/10: ladvise speed: 0.582151
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.516588
Iter 2/10: OSS cache speed: 0.575695
Iter 2/10: ladvise speed: 0.577958
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.512829
Iter 3/10: OSS cache speed: 0.485958
Iter 3/10: ladvise speed: 0.552247
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.50445
Iter 4/10: OSS cache speed: 0.525045
Iter 4/10: ladvise speed: 0.537131
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.523226
Iter 5/10: OSS cache speed: 0.558063
Iter 5/10: ladvise speed: 0.556614
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.522459
Iter 6/10: OSS cache speed: 0.554727
Iter 6/10: ladvise speed: 0.576321
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.523259
Iter 7/10: OSS cache speed: 0.585285
Iter 7/10: ladvise speed: 0.473433
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.448121
Iter 8/10: OSS cache speed: 0.530501
Iter 8/10: ladvise speed: 0.509138
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.483031
Iter 9/10: OSS cache speed: 0.552505
Iter 9/10: ladvise speed: 0.51567
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.53026
Iter 10/10: OSS cache speed: 0.506599
Iter 10/10: ladvise speed: 0.483919
Average uncached read: .50
Average speedup with OSS cached read:  .54 = +8%
Average speedup with ladvise willread:  .53 = +6%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0