== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:03:17 (1787832197)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4017 s, 8.5 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-ffff9a2f02bfe800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.396224
Iter 1/10: OSS cache speed: 0.393825
Iter 1/10: ladvise speed: 0.330803
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.358787
Iter 2/10: OSS cache speed: 0.365721
Iter 2/10: ladvise speed: 0.361013
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.339181
Iter 3/10: OSS cache speed: 0.337782
Iter 3/10: ladvise speed: 0.342218
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.385817
Iter 4/10: OSS cache speed: 0.347722
Iter 4/10: ladvise speed: 0.293935
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.337345
Iter 5/10: OSS cache speed: 0.346642
Iter 5/10: ladvise speed: 0.30586
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.276138
Iter 6/10: OSS cache speed: 0.307617
Iter 6/10: ladvise speed: 0.308915
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.259398
Iter 7/10: OSS cache speed: 0.298698
Iter 7/10: ladvise speed: 0.308096
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.314822
Iter 8/10: OSS cache speed: 0.353756
Iter 8/10: ladvise speed: 0.310183
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.351023
Iter 9/10: OSS cache speed: 0.36038
Iter 9/10: ladvise speed: 0.351578
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.362828
Iter 10/10: OSS cache speed: 0.334098
Iter 10/10: ladvise speed: 0.358416
Average uncached read: .33
Average speedup with OSS cached read:  .34 = +3%
Average speedup with ladvise willread:  .32 = +-3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0