== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:47:51 (1787118471)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.6463 s, 7.2 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-ffff98a4c791a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.31968
Iter 1/10: OSS cache speed: 0.276289
Iter 1/10: ladvise speed: 0.332884
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.292464
Iter 2/10: OSS cache speed: 0.31885
Iter 2/10: ladvise speed: 0.307413
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.284667
Iter 3/10: OSS cache speed: 0.306261
Iter 3/10: ladvise speed: 0.331711
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.311378
Iter 4/10: OSS cache speed: 0.273897
Iter 4/10: ladvise speed: 0.298058
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.310022
Iter 5/10: OSS cache speed: 0.280951
Iter 5/10: ladvise speed: 0.328343
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.326304
Iter 6/10: OSS cache speed: 0.31664
Iter 6/10: ladvise speed: 0.348625
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.334854
Iter 7/10: OSS cache speed: 0.326923
Iter 7/10: ladvise speed: 0.335688
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.327987
Iter 8/10: OSS cache speed: 0.341601
Iter 8/10: ladvise speed: 0.334658
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.33505
Iter 9/10: OSS cache speed: 0.337208
Iter 9/10: ladvise speed: 0.388059
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.370435
Iter 10/10: OSS cache speed: 0.334214
Iter 10/10: ladvise speed: 0.332104
Average uncached read: .32
Average speedup with OSS cached read:  .31 = +-3%
Average speedup with ladvise willread:  .33 = +3%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0