== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:16:17 (1787786177)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.5063 s, 8.4 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-ffff980e04e4b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.457425
Iter 1/10: OSS cache speed: 0.343642
Iter 1/10: ladvise speed: 0.476354
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.434661
Iter 2/10: OSS cache speed: 0.430277
Iter 2/10: ladvise speed: 0.451485
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.378566
Iter 3/10: OSS cache speed: 0.384951
Iter 3/10: ladvise speed: 0.358282
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.38897
Iter 4/10: OSS cache speed: 0.414114
Iter 4/10: ladvise speed: 0.560772
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.419392
Iter 5/10: OSS cache speed: 0.415087
Iter 5/10: ladvise speed: 0.453597
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.391416
Iter 6/10: OSS cache speed: 0.516843
Iter 6/10: ladvise speed: 0.383943
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.467083
Iter 7/10: OSS cache speed: 0.388735
Iter 7/10: ladvise speed: 0.393653
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.453292
Iter 8/10: OSS cache speed: 0.508453
Iter 8/10: ladvise speed: 0.4998
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.409208
Iter 9/10: OSS cache speed: 0.492566
Iter 9/10: ladvise speed: 0.478713
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.465445
Iter 10/10: OSS cache speed: 0.484349
Iter 10/10: ladvise speed: 0.631603
Average uncached read: .42
Average speedup with OSS cached read:  .43 = +2%
Average speedup with ladvise willread:  .46 = +9%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0