== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:57:39 (1788361059)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.01626 s, 11.6 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-ffff9dcf06839800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.454483
Iter 1/10: OSS cache speed: 0.442971
Iter 1/10: ladvise speed: 0.468063
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.439145
Iter 2/10: OSS cache speed: 0.452726
Iter 2/10: ladvise speed: 0.475557
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.505598
Iter 3/10: OSS cache speed: 0.515613
Iter 3/10: ladvise speed: 0.485016
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.511727
Iter 4/10: OSS cache speed: 0.482494
Iter 4/10: ladvise speed: 0.52751
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.530083
Iter 5/10: OSS cache speed: 0.476555
Iter 5/10: ladvise speed: 0.476287
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.531186
Iter 6/10: OSS cache speed: 0.526295
Iter 6/10: ladvise speed: 0.489152
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.542017
Iter 7/10: OSS cache speed: 0.532926
Iter 7/10: ladvise speed: 0.566896
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.569609
Iter 8/10: OSS cache speed: 0.778962
Iter 8/10: ladvise speed: 0.438498
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.52239
Iter 9/10: OSS cache speed: 0.512578
Iter 9/10: ladvise speed: 0.530994
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.488091
Iter 10/10: OSS cache speed: 0.506705
Iter 10/10: ladvise speed: 0.465263
Average uncached read: .50
Average speedup with OSS cached read:  .52 = +4%
Average speedup with ladvise willread:  .49 = +-2%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0