== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:50:26 (1788918626)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.9522 s, 8.8 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-ffff8d37104eb000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.409907
Iter 1/10: OSS cache speed: 0.439213
Iter 1/10: ladvise speed: 0.430086
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.322178
Iter 2/10: OSS cache speed: 0.424288
Iter 2/10: ladvise speed: 0.419312
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.450563
Iter 3/10: OSS cache speed: 0.514536
Iter 3/10: ladvise speed: 0.631408
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.655482
Iter 4/10: OSS cache speed: 0.847827
Iter 4/10: ladvise speed: 0.846017
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.796901
Iter 5/10: OSS cache speed: 0.984182
Iter 5/10: ladvise speed: 1.14199
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.01919
Iter 6/10: OSS cache speed: 1.29831
Iter 6/10: ladvise speed: 1.35044
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.931349
Iter 7/10: OSS cache speed: 0.52994
Iter 7/10: ladvise speed: 0.577975
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.555786
Iter 8/10: OSS cache speed: 0.611431
Iter 8/10: ladvise speed: 0.284578
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.393194
Iter 9/10: OSS cache speed: 0.431595
Iter 9/10: ladvise speed: 0.466415
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.442732
Iter 10/10: OSS cache speed: 0.447936
Iter 10/10: ladvise speed: 0.489734
Average uncached read: .59
Average speedup with OSS cached read:  .65 = +10%
Average speedup with ladvise willread:  .66 = +11%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0