== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:36:22 (1746131782)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 5.437 s, 19.3 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-ffff8800b3979000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.59721
Iter 1/10: OSS cache speed: 0.819451
Iter 1/10: ladvise speed: 0.770572
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.678055
Iter 2/10: OSS cache speed: 0.762748
Iter 2/10: ladvise speed: 0.771963
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.678946
Iter 3/10: OSS cache speed: 0.843037
Iter 3/10: ladvise speed: 0.749401
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.6584
Iter 4/10: OSS cache speed: 0.754779
Iter 4/10: ladvise speed: 0.836414
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.751884
Iter 5/10: OSS cache speed: 0.712718
Iter 5/10: ladvise speed: 0.783556
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.72275
Iter 6/10: OSS cache speed: 0.85222
Iter 6/10: ladvise speed: 0.902199
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.773588
Iter 7/10: OSS cache speed: 0.77838
Iter 7/10: ladvise speed: 0.835565
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.740201
Iter 8/10: OSS cache speed: 0.858813
Iter 8/10: ladvise speed: 0.917736
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.72619
Iter 9/10: OSS cache speed: 0.869779
Iter 9/10: ladvise speed: 0.890776
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.797264
Iter 10/10: OSS cache speed: 0.894407
Iter 10/10: ladvise speed: 0.760494
Average uncached read: .71
Average speedup with OSS cached read:  .81 = +14%
Average speedup with ladvise willread:  .82 = +15%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0