== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:30:54 (1763346654)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.3695 s, 7.8 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-ffff9eb344f14000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.448951
Iter 1/10: OSS cache speed: 0.445427
Iter 1/10: ladvise speed: 0.485939
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.423564
Iter 2/10: OSS cache speed: 0.456667
Iter 2/10: ladvise speed: 0.482536
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.441254
Iter 3/10: OSS cache speed: 0.469702
Iter 3/10: ladvise speed: 0.520537
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.475972
Iter 4/10: OSS cache speed: 0.552473
Iter 4/10: ladvise speed: 0.516053
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.486772
Iter 5/10: OSS cache speed: 0.518522
Iter 5/10: ladvise speed: 0.509618
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.539232
Iter 6/10: OSS cache speed: 0.520792
Iter 6/10: ladvise speed: 0.475919
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.449604
Iter 7/10: OSS cache speed: 0.536871
Iter 7/10: ladvise speed: 0.542224
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.530506
Iter 8/10: OSS cache speed: 0.548771
Iter 8/10: ladvise speed: 0.482437
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.519056
Iter 9/10: OSS cache speed: 0.582456
Iter 9/10: ladvise speed: 0.544811
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.540523
Iter 10/10: OSS cache speed: 0.536358
Iter 10/10: ladvise speed: 0.506467
Average uncached read: .48
Average speedup with OSS cached read:  .51 = +6%
Average speedup with ladvise willread:  .50 = +4%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0