== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:16:58 (1781219818)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.0622 s, 7.5 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-ffff9908c7e19800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.326418
Iter 1/10: OSS cache speed: 0.352614
Iter 1/10: ladvise speed: 0.329356
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.270783
Iter 2/10: OSS cache speed: 0.353755
Iter 2/10: ladvise speed: 0.356159
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.308537
Iter 3/10: OSS cache speed: 0.312778
Iter 3/10: ladvise speed: 0.325996
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.322572
Iter 4/10: OSS cache speed: 0.333984
Iter 4/10: ladvise speed: 0.330751
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.32852
Iter 5/10: OSS cache speed: 0.337678
Iter 5/10: ladvise speed: 0.34304
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.345939
Iter 6/10: OSS cache speed: 0.294402
Iter 6/10: ladvise speed: 0.339454
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.27866
Iter 7/10: OSS cache speed: 0.344384
Iter 7/10: ladvise speed: 0.35338
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.310862
Iter 8/10: OSS cache speed: 0.326302
Iter 8/10: ladvise speed: 0.33445
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.292527
Iter 9/10: OSS cache speed: 0.326982
Iter 9/10: ladvise speed: 0.399144
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.299384
Iter 10/10: OSS cache speed: 0.32143
Iter 10/10: ladvise speed: 0.337777
Average uncached read: .30
Average speedup with OSS cached read:  .33 = +10%
Average speedup with ladvise willread:  .34 = +13%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0