== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:37:16 (1787834236)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.0697 s, 9.5 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-ffff9e264651f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.457821
Iter 1/10: OSS cache speed: 0.520724
Iter 1/10: ladvise speed: 0.399793
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.410355
Iter 2/10: OSS cache speed: 0.504661
Iter 2/10: ladvise speed: 0.431565
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.440145
Iter 3/10: OSS cache speed: 0.385681
Iter 3/10: ladvise speed: 0.477223
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.452703
Iter 4/10: OSS cache speed: 0.370625
Iter 4/10: ladvise speed: 0.431452
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.436626
Iter 5/10: OSS cache speed: 0.432484
Iter 5/10: ladvise speed: 0.4887
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.47958
Iter 6/10: OSS cache speed: 0.501973
Iter 6/10: ladvise speed: 0.469732
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.473101
Iter 7/10: OSS cache speed: 0.470759
Iter 7/10: ladvise speed: 0.357632
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.461424
Iter 8/10: OSS cache speed: 0.512807
Iter 8/10: ladvise speed: 0.435152
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.46019
Iter 9/10: OSS cache speed: 0.375999
Iter 9/10: ladvise speed: 0.427484
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.441654
Iter 10/10: OSS cache speed: 0.42804
Iter 10/10: ladvise speed: 0.398753
Average uncached read: .45
Average speedup with OSS cached read:  .45 = +0%
Average speedup with ladvise willread:  .43 = +-4%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0