== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:00:28 (1786752028)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 17.0164 s, 6.2 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-ffff966648d20000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.346565
Iter 1/10: OSS cache speed: 0.340211
Iter 1/10: ladvise speed: 0.335695
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.344404
Iter 2/10: OSS cache speed: 0.295048
Iter 2/10: ladvise speed: 0.343241
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.326547
Iter 3/10: OSS cache speed: 0.322567
Iter 3/10: ladvise speed: 0.335685
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.322824
Iter 4/10: OSS cache speed: 0.325917
Iter 4/10: ladvise speed: 0.269349
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.299366
Iter 5/10: OSS cache speed: 0.25398
Iter 5/10: ladvise speed: 0.318674
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.329435
Iter 6/10: OSS cache speed: 0.338572
Iter 6/10: ladvise speed: 0.394708
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.379763
Iter 7/10: OSS cache speed: 0.416593
Iter 7/10: ladvise speed: 0.427737
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.294242
Iter 8/10: OSS cache speed: 0.333237
Iter 8/10: ladvise speed: 0.366437
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.375945
Iter 9/10: OSS cache speed: 0.401969
Iter 9/10: ladvise speed: 0.36261
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.369128
Iter 10/10: OSS cache speed: 0.366604
Iter 10/10: ladvise speed: 0.43552
Average uncached read: .33
Average speedup with OSS cached read:  .33 = +0%
Average speedup with ladvise willread:  .35 = +6%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0