== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:47:38 (1746157658)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.53363 s, 23.1 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-ffff88012e186000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.729149
Iter 1/10: OSS cache speed: 0.949521
Iter 1/10: ladvise speed: 1.05831
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.872869
Iter 2/10: OSS cache speed: 0.90315
Iter 2/10: ladvise speed: 1.08194
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.896514
Iter 3/10: OSS cache speed: 0.989617
Iter 3/10: ladvise speed: 0.915387
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.886268
Iter 4/10: OSS cache speed: 0.92492
Iter 4/10: ladvise speed: 0.984143
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.79463
Iter 5/10: OSS cache speed: 1.03329
Iter 5/10: ladvise speed: 1.03119
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.808627
Iter 6/10: OSS cache speed: 0.989531
Iter 6/10: ladvise speed: 0.986213
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.983522
Iter 7/10: OSS cache speed: 1.21533
Iter 7/10: ladvise speed: 1.20875
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.924278
Iter 8/10: OSS cache speed: 1.13454
Iter 8/10: ladvise speed: 1.33608
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.02728
Iter 9/10: OSS cache speed: 1.12111
Iter 9/10: ladvise speed: 1.12673
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.943421
Iter 10/10: OSS cache speed: 1.20231
Iter 10/10: ladvise speed: 1.12818
Average uncached read: .88
Average speedup with OSS cached read:  1.04 = +18%
Average speedup with ladvise willread:  1.08 = +22%
Speedup with OSS cached read less than 20%,  got 18%. Skipping ladvise willread check.
fail_loc=0