== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:35:47 (1772472947)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 16.4593 s, 6.4 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-ffff9f4b84a7f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.27407
Iter 1/10: OSS cache speed: 0.289397
Iter 1/10: ladvise speed: 0.312227
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.294182
Iter 2/10: OSS cache speed: 0.278183
Iter 2/10: ladvise speed: 0.343226
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.396062
Iter 3/10: OSS cache speed: 0.406208
Iter 3/10: ladvise speed: 0.488266
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.474456
Iter 4/10: OSS cache speed: 0.521598
Iter 4/10: ladvise speed: 0.539903
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.529862
Iter 5/10: OSS cache speed: 0.520918
Iter 5/10: ladvise speed: 0.527812
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.537137
Iter 6/10: OSS cache speed: 0.549372
Iter 6/10: ladvise speed: 0.559547
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.568828
Iter 7/10: OSS cache speed: 0.554076
Iter 7/10: ladvise speed: 0.580332
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.581271
Iter 8/10: OSS cache speed: 0.718204
Iter 8/10: ladvise speed: 0.649521
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.677104
Iter 9/10: OSS cache speed: 0.624353
Iter 9/10: ladvise speed: 0.654831
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.65871
Iter 10/10: OSS cache speed: 0.671377
Iter 10/10: ladvise speed: 0.72272
Average uncached read: .49
Average speedup with OSS cached read:  .51 = +4%
Average speedup with ladvise willread:  .53 = +8%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0