== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:23:43 (1786019023)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 16.9078 s, 6.2 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-ffff8bcad1abb000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.275233
Iter 1/10: OSS cache speed: 0.269399
Iter 1/10: ladvise speed: 0.277113
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.274736
Iter 2/10: OSS cache speed: 0.266285
Iter 2/10: ladvise speed: 0.217895
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.22372
Iter 3/10: OSS cache speed: 0.251754
Iter 3/10: ladvise speed: 0.270058
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.224835
Iter 4/10: OSS cache speed: 0.301614
Iter 4/10: ladvise speed: 0.289526
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.275339
Iter 5/10: OSS cache speed: 0.236557
Iter 5/10: ladvise speed: 0.260531
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.213323
Iter 6/10: OSS cache speed: 0.207498
Iter 6/10: ladvise speed: 0.22107
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.220661
Iter 7/10: OSS cache speed: 0.233949
Iter 7/10: ladvise speed: 0.287514
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.217769
Iter 8/10: OSS cache speed: 0.279728
Iter 8/10: ladvise speed: 0.248442
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.241238
Iter 9/10: OSS cache speed: 0.236006
Iter 9/10: ladvise speed: 0.245781
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.193868
Iter 10/10: OSS cache speed: 0.200091
Iter 10/10: ladvise speed: 0.227957
Average uncached read: .23
Average speedup with OSS cached read:  .24 = +4%
Average speedup with ladvise willread:  .25 = +8%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0