== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:51:14 (1788799874)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.6804 s, 9.0 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-ffff8b790bfc4800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.332924
Iter 1/10: OSS cache speed: 0.444045
Iter 1/10: ladvise speed: 0.359697
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.414687
Iter 2/10: OSS cache speed: 0.383774
Iter 2/10: ladvise speed: 0.364426
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.369993
Iter 3/10: OSS cache speed: 0.397883
Iter 3/10: ladvise speed: 0.365365
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.392534
Iter 4/10: OSS cache speed: 0.35969
Iter 4/10: ladvise speed: 0.36569
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.3804
Iter 5/10: OSS cache speed: 0.313649
Iter 5/10: ladvise speed: 0.346837
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.361947
Iter 6/10: OSS cache speed: 0.359537
Iter 6/10: ladvise speed: 0.385309
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.409544
Iter 7/10: OSS cache speed: 0.436488
Iter 7/10: ladvise speed: 0.443355
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.379144
Iter 8/10: OSS cache speed: 0.391689
Iter 8/10: ladvise speed: 0.346698
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.379135
Iter 9/10: OSS cache speed: 0.297264
Iter 9/10: ladvise speed: 0.360909
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.400258
Iter 10/10: OSS cache speed: 0.408084
Iter 10/10: ladvise speed: 0.370655
Average uncached read: .38
Average speedup with OSS cached read:  .37 = +-2%
Average speedup with ladvise willread:  .37 = +-2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0