== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:50:53 (1746147053)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.33626 s, 24.2 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-ffff8800b6022800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.823793
Iter 1/10: OSS cache speed: 0.94956
Iter 1/10: ladvise speed: 0.940254
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.889182
Iter 2/10: OSS cache speed: 0.943018
Iter 2/10: ladvise speed: 1.06381
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.939341
Iter 3/10: OSS cache speed: 0.951861
Iter 3/10: ladvise speed: 0.849118
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.957144
Iter 4/10: OSS cache speed: 1.04467
Iter 4/10: ladvise speed: 1.13197
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.91039
Iter 5/10: OSS cache speed: 1.02356
Iter 5/10: ladvise speed: 0.959773
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.05509
Iter 6/10: OSS cache speed: 1.20528
Iter 6/10: ladvise speed: 0.999948
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.818473
Iter 7/10: OSS cache speed: 0.900168
Iter 7/10: ladvise speed: 1.14085
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.922329
Iter 8/10: OSS cache speed: 1.07351
Iter 8/10: ladvise speed: 1.13279
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.912879
Iter 9/10: OSS cache speed: 0.964464
Iter 9/10: ladvise speed: 0.991094
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.01371
Iter 10/10: OSS cache speed: 1.20921
Iter 10/10: ladvise speed: 1.08713
Average uncached read: .92
Average speedup with OSS cached read:  1.02 = +10%
Average speedup with ladvise willread:  1.02 = +10%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0