== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:12:05 (1746144725)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 6.2744 s, 16.7 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-ffff88012c117000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.57758
Iter 1/10: OSS cache speed: 0.604282
Iter 1/10: ladvise speed: 0.62354
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.612794
Iter 2/10: OSS cache speed: 0.549522
Iter 2/10: ladvise speed: 0.566689
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.57072
Iter 3/10: OSS cache speed: 0.613512
Iter 3/10: ladvise speed: 0.563126
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.610164
Iter 4/10: OSS cache speed: 0.583562
Iter 4/10: ladvise speed: 0.583822
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.632961
Iter 5/10: OSS cache speed: 0.597626
Iter 5/10: ladvise speed: 0.596282
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.575386
Iter 6/10: OSS cache speed: 0.54156
Iter 6/10: ladvise speed: 0.492703
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.558853
Iter 7/10: OSS cache speed: 0.580983
Iter 7/10: ladvise speed: 0.555929
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.573354
Iter 8/10: OSS cache speed: 0.557398
Iter 8/10: ladvise speed: 0.538648
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.553367
Iter 9/10: OSS cache speed: 0.640417
Iter 9/10: ladvise speed: 0.601724
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.666362
Iter 10/10: OSS cache speed: 0.600973
Iter 10/10: ladvise speed: 0.584479
Average uncached read: .59
Average speedup with OSS cached read:  .58 = +-1%
Average speedup with ladvise willread:  .57 = +-3%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0