== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:13:02 (1789067582)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.4923 s, 9.1 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-ffff8a8b52ef9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.472488
Iter 1/10: OSS cache speed: 0.521502
Iter 1/10: ladvise speed: 0.54328
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.492642
Iter 2/10: OSS cache speed: 0.565067
Iter 2/10: ladvise speed: 0.571012
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.470113
Iter 3/10: OSS cache speed: 0.555952
Iter 3/10: ladvise speed: 0.539217
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.505418
Iter 4/10: OSS cache speed: 0.510802
Iter 4/10: ladvise speed: 0.547691
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.505613
Iter 5/10: OSS cache speed: 0.500257
Iter 5/10: ladvise speed: 0.499377
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.453479
Iter 6/10: OSS cache speed: 0.527202
Iter 6/10: ladvise speed: 0.505959
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.427571
Iter 7/10: OSS cache speed: 0.515891
Iter 7/10: ladvise speed: 0.492379
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.444226
Iter 8/10: OSS cache speed: 0.399088
Iter 8/10: ladvise speed: 0.505258
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.443418
Iter 9/10: OSS cache speed: 0.466194
Iter 9/10: ladvise speed: 0.384501
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.39983
Iter 10/10: OSS cache speed: 0.471133
Iter 10/10: ladvise speed: 0.470988
Average uncached read: .46
Average speedup with OSS cached read:  .50 = +8%
Average speedup with ladvise willread:  .50 = +8%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0