== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:31:12 (1787603472)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.7802 s, 9.7 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-ffff8c46144a3800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.41011
Iter 1/10: OSS cache speed: 0.431234
Iter 1/10: ladvise speed: 0.405089
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.381351
Iter 2/10: OSS cache speed: 0.428208
Iter 2/10: ladvise speed: 0.401246
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.417222
Iter 3/10: OSS cache speed: 0.401557
Iter 3/10: ladvise speed: 0.440874
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.42648
Iter 4/10: OSS cache speed: 0.440243
Iter 4/10: ladvise speed: 0.445059
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.387096
Iter 5/10: OSS cache speed: 0.354828
Iter 5/10: ladvise speed: 0.396216
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.435685
Iter 6/10: OSS cache speed: 0.362009
Iter 6/10: ladvise speed: 0.392589
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.379691
Iter 7/10: OSS cache speed: 0.371499
Iter 7/10: ladvise speed: 0.408207
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.392964
Iter 8/10: OSS cache speed: 0.33879
Iter 8/10: ladvise speed: 0.342297
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.375403
Iter 9/10: OSS cache speed: 0.380183
Iter 9/10: ladvise speed: 0.392969
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.385742
Iter 10/10: OSS cache speed: 0.324244
Iter 10/10: ladvise speed: 0.358563
Average uncached read: .39
Average speedup with OSS cached read:  .38 = +-2%
Average speedup with ladvise willread:  .39 = +0%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0