== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:55:23 (1745621723)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 6.90405 s, 15.2 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-ffff880136919800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.476585
Iter 1/10: OSS cache speed: 0.516465
Iter 1/10: ladvise speed: 0.529482
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.544626
Iter 2/10: OSS cache speed: 0.552087
Iter 2/10: ladvise speed: 0.529957
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.553559
Iter 3/10: OSS cache speed: 0.559375
Iter 3/10: ladvise speed: 0.54284
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.56697
Iter 4/10: OSS cache speed: 0.589393
Iter 4/10: ladvise speed: 0.578855
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.523919
Iter 5/10: OSS cache speed: 0.51962
Iter 5/10: ladvise speed: 0.536339
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.535526
Iter 6/10: OSS cache speed: 0.526658
Iter 6/10: ladvise speed: 0.497313
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.58546
Iter 7/10: OSS cache speed: 0.66856
Iter 7/10: ladvise speed: 0.694474
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.777806
Iter 8/10: OSS cache speed: 0.723519
Iter 8/10: ladvise speed: 0.854803
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.763615
Iter 9/10: OSS cache speed: 0.893652
Iter 9/10: ladvise speed: 0.723452
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.71748
Iter 10/10: OSS cache speed: 0.748395
Iter 10/10: ladvise speed: 0.845046
Average uncached read: .60
Average speedup with OSS cached read:  .62 = +3%
Average speedup with ladvise willread:  .63 = +5%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0