== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:45:40 (1787744740)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 18.6819 s, 5.6 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-ffff9595905d3000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.246081
Iter 1/10: OSS cache speed: 0.294743
Iter 1/10: ladvise speed: 0.28634
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.292825
Iter 2/10: OSS cache speed: 0.277722
Iter 2/10: ladvise speed: 0.26285
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.290491
Iter 3/10: OSS cache speed: 0.267925
Iter 3/10: ladvise speed: 0.282512
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.252844
Iter 4/10: OSS cache speed: 0.288613
Iter 4/10: ladvise speed: 0.230459
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.264633
Iter 5/10: OSS cache speed: 0.293566
Iter 5/10: ladvise speed: 0.288503
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.263504
Iter 6/10: OSS cache speed: 0.278505
Iter 6/10: ladvise speed: 0.309342
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.283207
Iter 7/10: OSS cache speed: 0.323053
Iter 7/10: ladvise speed: 0.290298
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.297959
Iter 8/10: OSS cache speed: 0.266596
Iter 8/10: ladvise speed: 0.363875
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.264302
Iter 9/10: OSS cache speed: 0.299288
Iter 9/10: ladvise speed: 0.322843
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.317366
Iter 10/10: OSS cache speed: 0.283206
Iter 10/10: ladvise speed: 0.248382
Average uncached read: .27
Average speedup with OSS cached read:  .28 = +3%
Average speedup with ladvise willread:  .28 = +3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0