== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:07:15 (1771402035)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.2158 s, 8.6 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-ffff97a8480bb000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.391277
Iter 1/10: OSS cache speed: 0.459372
Iter 1/10: ladvise speed: 0.410794
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.46133
Iter 2/10: OSS cache speed: 0.508914
Iter 2/10: ladvise speed: 0.490421
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.456468
Iter 3/10: OSS cache speed: 0.545071
Iter 3/10: ladvise speed: 0.554108
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.51488
Iter 4/10: OSS cache speed: 0.578358
Iter 4/10: ladvise speed: 0.59072
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.547977
Iter 5/10: OSS cache speed: 0.602866
Iter 5/10: ladvise speed: 0.631957
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.581041
Iter 6/10: OSS cache speed: 0.667343
Iter 6/10: ladvise speed: 0.659815
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.595361
Iter 7/10: OSS cache speed: 0.660269
Iter 7/10: ladvise speed: 0.70085
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.598112
Iter 8/10: OSS cache speed: 0.669546
Iter 8/10: ladvise speed: 0.704027
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.608175
Iter 9/10: OSS cache speed: 0.841681
Iter 9/10: ladvise speed: 0.912955
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.760019
Iter 10/10: OSS cache speed: 0.908657
Iter 10/10: ladvise speed: 0.857529
Average uncached read: .55
Average speedup with OSS cached read:  .64 = +16%
Average speedup with ladvise willread:  .65 = +18%
Speedup with OSS cached read less than 20%,  got 16%. Skipping ladvise willread check.
fail_loc=0