== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:03:07 (1789779787)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4243 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-ffff92268635d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.483588
Iter 1/10: OSS cache speed: 0.512447
Iter 1/10: ladvise speed: 0.506598
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.460989
Iter 2/10: OSS cache speed: 0.444933
Iter 2/10: ladvise speed: 0.473076
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.439166
Iter 3/10: OSS cache speed: 0.402
Iter 3/10: ladvise speed: 0.480708
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.364518
Iter 4/10: OSS cache speed: 0.460514
Iter 4/10: ladvise speed: 0.371483
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.42176
Iter 5/10: OSS cache speed: 0.444432
Iter 5/10: ladvise speed: 0.416795
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.429891
Iter 6/10: OSS cache speed: 0.403801
Iter 6/10: ladvise speed: 0.371535
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.388769
Iter 7/10: OSS cache speed: 0.438483
Iter 7/10: ladvise speed: 0.361991
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.433177
Iter 8/10: OSS cache speed: 0.491201
Iter 8/10: ladvise speed: 0.49346
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.446925
Iter 9/10: OSS cache speed: 0.395534
Iter 9/10: ladvise speed: 0.450446
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.465342
Iter 10/10: OSS cache speed: 0.519775
Iter 10/10: ladvise speed: 0.423079
Average uncached read: .43
Average speedup with OSS cached read:  .45 = +4%
Average speedup with ladvise willread:  .43 = +0%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0