== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:13:58 (1763154838)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.62073 s, 10.9 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-ffff88c3c703c000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.450947
Iter 1/10: OSS cache speed: 0.554753
Iter 1/10: ladvise speed: 0.548991
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.574563
Iter 2/10: OSS cache speed: 0.629314
Iter 2/10: ladvise speed: 0.535416
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.457762
Iter 3/10: OSS cache speed: 0.55059
Iter 3/10: ladvise speed: 0.547419
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.489716
Iter 4/10: OSS cache speed: 0.492626
Iter 4/10: ladvise speed: 0.57559
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.44753
Iter 5/10: OSS cache speed: 0.518445
Iter 5/10: ladvise speed: 0.561737
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.529441
Iter 6/10: OSS cache speed: 0.599482
Iter 6/10: ladvise speed: 0.650881
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.546767
Iter 7/10: OSS cache speed: 0.611616
Iter 7/10: ladvise speed: 0.606665
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.550267
Iter 8/10: OSS cache speed: 0.585158
Iter 8/10: ladvise speed: 0.586183
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.55764
Iter 9/10: OSS cache speed: 0.629487
Iter 9/10: ladvise speed: 0.620168
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.60049
Iter 10/10: OSS cache speed: 0.587296
Iter 10/10: ladvise speed: 0.548282
Average uncached read: .52
Average speedup with OSS cached read:  .57 = +9%
Average speedup with ladvise willread:  .57 = +9%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0