== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:37:27 (1787341047)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4766 s, 8.4 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-ffff924986f61000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.334926
Iter 1/10: OSS cache speed: 0.397003
Iter 1/10: ladvise speed: 0.41205
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.336973
Iter 2/10: OSS cache speed: 0.354811
Iter 2/10: ladvise speed: 0.377623
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.33384
Iter 3/10: OSS cache speed: 0.393285
Iter 3/10: ladvise speed: 0.38752
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.323802
Iter 4/10: OSS cache speed: 0.304749
Iter 4/10: ladvise speed: 0.350617
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.34503
Iter 5/10: OSS cache speed: 0.370207
Iter 5/10: ladvise speed: 0.400869
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.344886
Iter 6/10: OSS cache speed: 0.383672
Iter 6/10: ladvise speed: 0.36352
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.3756
Iter 7/10: OSS cache speed: 0.414906
Iter 7/10: ladvise speed: 0.388196
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.368383
Iter 8/10: OSS cache speed: 0.405979
Iter 8/10: ladvise speed: 0.396829
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.338333
Iter 9/10: OSS cache speed: 0.401462
Iter 9/10: ladvise speed: 0.385038
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.346279
Iter 10/10: OSS cache speed: 0.366185
Iter 10/10: ladvise speed: 0.379336
Average uncached read: .34
Average speedup with OSS cached read:  .37 = +8%
Average speedup with ladvise willread:  .38 = +11%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0