== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:07:11 (1781237231)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.2709 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-ffff9226d097f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.339912
Iter 1/10: OSS cache speed: 0.371994
Iter 1/10: ladvise speed: 0.504344
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.446254
Iter 2/10: OSS cache speed: 0.389288
Iter 2/10: ladvise speed: 0.368791
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.345893
Iter 3/10: OSS cache speed: 0.411208
Iter 3/10: ladvise speed: 0.386024
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.382367
Iter 4/10: OSS cache speed: 0.482537
Iter 4/10: ladvise speed: 0.476974
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.38701
Iter 5/10: OSS cache speed: 0.367748
Iter 5/10: ladvise speed: 0.360637
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.375563
Iter 6/10: OSS cache speed: 0.364354
Iter 6/10: ladvise speed: 0.413744
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.374384
Iter 7/10: OSS cache speed: 0.427259
Iter 7/10: ladvise speed: 0.378479
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.414012
Iter 8/10: OSS cache speed: 0.422965
Iter 8/10: ladvise speed: 0.346745
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.405837
Iter 9/10: OSS cache speed: 0.443485
Iter 9/10: ladvise speed: 0.420385
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.433065
Iter 10/10: OSS cache speed: 0.449576
Iter 10/10: ladvise speed: 0.366478
Average uncached read: .39
Average speedup with OSS cached read:  .41 = +5%
Average speedup with ladvise willread:  .40 = +2%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0