== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:22:37 (1788286957)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.6114 s, 8.3 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-ffff98fe914de000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.402846
Iter 1/10: OSS cache speed: 0.363521
Iter 1/10: ladvise speed: 0.366444
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.36824
Iter 2/10: OSS cache speed: 0.380095
Iter 2/10: ladvise speed: 0.400218
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.389257
Iter 3/10: OSS cache speed: 0.355454
Iter 3/10: ladvise speed: 0.365862
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.388293
Iter 4/10: OSS cache speed: 0.342225
Iter 4/10: ladvise speed: 0.391852
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.344506
Iter 5/10: OSS cache speed: 0.37686
Iter 5/10: ladvise speed: 0.406983
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.37833
Iter 6/10: OSS cache speed: 0.359296
Iter 6/10: ladvise speed: 0.329283
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.351607
Iter 7/10: OSS cache speed: 0.271272
Iter 7/10: ladvise speed: 0.372716
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.353212
Iter 8/10: OSS cache speed: 0.378015
Iter 8/10: ladvise speed: 0.344913
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.316839
Iter 9/10: OSS cache speed: 0.342455
Iter 9/10: ladvise speed: 0.39048
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.336368
Iter 10/10: OSS cache speed: 0.380959
Iter 10/10: ladvise speed: 0.392551
Average uncached read: .36
Average speedup with OSS cached read:  .35 = +-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