== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:28:40 (1787369320)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.7279 s, 9.8 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-ffff98e4533b8000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.452583
Iter 1/10: OSS cache speed: 0.407917
Iter 1/10: ladvise speed: 0.432056
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.4687
Iter 2/10: OSS cache speed: 0.435162
Iter 2/10: ladvise speed: 0.419388
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.421942
Iter 3/10: OSS cache speed: 0.374101
Iter 3/10: ladvise speed: 0.377062
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.392263
Iter 4/10: OSS cache speed: 0.437299
Iter 4/10: ladvise speed: 0.415206
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.401853
Iter 5/10: OSS cache speed: 0.406712
Iter 5/10: ladvise speed: 0.433718
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.457793
Iter 6/10: OSS cache speed: 0.39939
Iter 6/10: ladvise speed: 0.433339
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.426019
Iter 7/10: OSS cache speed: 0.385214
Iter 7/10: ladvise speed: 0.470935
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.42236
Iter 8/10: OSS cache speed: 0.385507
Iter 8/10: ladvise speed: 0.408006
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.378225
Iter 9/10: OSS cache speed: 0.404146
Iter 9/10: ladvise speed: 0.42915
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.41961
Iter 10/10: OSS cache speed: 0.441307
Iter 10/10: ladvise speed: 0.464158
Average uncached read: .42
Average speedup with OSS cached read:  .40 = +-4%
Average speedup with ladvise willread:  .42 = +0%
Speedup with OSS cached read less than 20%,  got -4%. Skipping ladvise willread check.
fail_loc=0