== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:12:16 (1763489536)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.40114 s, 16.4 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-ffff9cb8486d1800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.55024
Iter 1/10: OSS cache speed: 1.51991
Iter 1/10: ladvise speed: 1.50467
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.30023
Iter 2/10: OSS cache speed: 1.14006
Iter 2/10: ladvise speed: 1.51459
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.37915
Iter 3/10: OSS cache speed: 1.52262
Iter 3/10: ladvise speed: 1.7396
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.41856
Iter 4/10: OSS cache speed: 1.51898
Iter 4/10: ladvise speed: 1.77536
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.57236
Iter 5/10: OSS cache speed: 1.72658
Iter 5/10: ladvise speed: 1.74052
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.79309
Iter 6/10: OSS cache speed: 1.97965
Iter 6/10: ladvise speed: 1.90942
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.8759
Iter 7/10: OSS cache speed: 1.89685
Iter 7/10: ladvise speed: 2.07903
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.32745
Iter 8/10: OSS cache speed: 0.770344
Iter 8/10: ladvise speed: 0.385778
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.529708
Iter 9/10: OSS cache speed: 0.599952
Iter 9/10: ladvise speed: 0.738051
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.00971
Iter 10/10: OSS cache speed: 1.41449
Iter 10/10: ladvise speed: 2.02306
Average uncached read: 1.47
Average speedup with OSS cached read:  1.40 = +-4%
Average speedup with ladvise willread:  1.54 = +4%
Speedup with OSS cached read less than 20%,  got -4%. Skipping ladvise willread check.
fail_loc=0