== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:28:24 (1786940904)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.15789 s, 12.9 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-ffff9f2a8a9d9000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.569634
Iter 1/10: OSS cache speed: 0.470381
Iter 1/10: ladvise speed: 0.4017
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.535406
Iter 2/10: OSS cache speed: 0.567572
Iter 2/10: ladvise speed: 0.559679
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.621105
Iter 3/10: OSS cache speed: 0.714351
Iter 3/10: ladvise speed: 0.421601
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.218335
Iter 4/10: OSS cache speed: 0.425277
Iter 4/10: ladvise speed: 0.353745
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.414363
Iter 5/10: OSS cache speed: 0.38563
Iter 5/10: ladvise speed: 0.451466
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.529203
Iter 6/10: OSS cache speed: 0.589256
Iter 6/10: ladvise speed: 0.530392
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.573297
Iter 7/10: OSS cache speed: 0.548646
Iter 7/10: ladvise speed: 0.606715
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.582677
Iter 8/10: OSS cache speed: 0.652311
Iter 8/10: ladvise speed: 0.632004
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.676115
Iter 9/10: OSS cache speed: 0.651266
Iter 9/10: ladvise speed: 0.644474
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.544272
Iter 10/10: OSS cache speed: 0.316409
Iter 10/10: ladvise speed: 0.516887
Average uncached read: .52
Average speedup with OSS cached read:  .53 = +1%
Average speedup with ladvise willread:  .51 = +-1%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0