== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:12:21 (1789783941)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.413 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-ffff988789df2800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.348221
Iter 1/10: OSS cache speed: 0.347266
Iter 1/10: ladvise speed: 0.336885
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.345974
Iter 2/10: OSS cache speed: 0.318698
Iter 2/10: ladvise speed: 0.352061
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.323349
Iter 3/10: OSS cache speed: 0.298897
Iter 3/10: ladvise speed: 0.333577
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.332618
Iter 4/10: OSS cache speed: 0.343169
Iter 4/10: ladvise speed: 0.355408
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.294797
Iter 5/10: OSS cache speed: 0.310491
Iter 5/10: ladvise speed: 0.323361
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.390373
Iter 6/10: OSS cache speed: 0.309347
Iter 6/10: ladvise speed: 0.357607
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.338033
Iter 7/10: OSS cache speed: 0.375632
Iter 7/10: ladvise speed: 0.38586
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.384458
Iter 8/10: OSS cache speed: 0.36829
Iter 8/10: ladvise speed: 0.327892
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.302711
Iter 9/10: OSS cache speed: 0.331988
Iter 9/10: ladvise speed: 0.34521
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.337122
Iter 10/10: OSS cache speed: 0.32944
Iter 10/10: ladvise speed: 0.368181
Average uncached read: .33
Average speedup with OSS cached read:  .33 = +0%
Average speedup with ladvise willread:  .34 = +3%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0