== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:21:14 (1772472074)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.5134 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-ffff968588135000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.42286
Iter 1/10: OSS cache speed: 0.42364
Iter 1/10: ladvise speed: 0.360987
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.367038
Iter 2/10: OSS cache speed: 0.383053
Iter 2/10: ladvise speed: 0.394811
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.442558
Iter 3/10: OSS cache speed: 0.418372
Iter 3/10: ladvise speed: 0.371851
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.363207
Iter 4/10: OSS cache speed: 0.369846
Iter 4/10: ladvise speed: 0.385306
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.362625
Iter 5/10: OSS cache speed: 0.380647
Iter 5/10: ladvise speed: 0.298801
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.322532
Iter 6/10: OSS cache speed: 0.381239
Iter 6/10: ladvise speed: 0.366656
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.444442
Iter 7/10: OSS cache speed: 0.45953
Iter 7/10: ladvise speed: 0.618049
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.565018
Iter 8/10: OSS cache speed: 0.565309
Iter 8/10: ladvise speed: 0.60879
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.6572
Iter 9/10: OSS cache speed: 0.60425
Iter 9/10: ladvise speed: 0.562275
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.533516
Iter 10/10: OSS cache speed: 0.552427
Iter 10/10: ladvise speed: 0.580953
Average uncached read: .44
Average speedup with OSS cached read:  .45 = +2%
Average speedup with ladvise willread:  .45 = +2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0