== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:41:49 (1789450909)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.6909 s, 9.0 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-ffff9f91c9346800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.414156
Iter 1/10: OSS cache speed: 0.402371
Iter 1/10: ladvise speed: 0.468358
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.39495
Iter 2/10: OSS cache speed: 0.392902
Iter 2/10: ladvise speed: 0.458129
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.426744
Iter 3/10: OSS cache speed: 0.422109
Iter 3/10: ladvise speed: 0.468684
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.388627
Iter 4/10: OSS cache speed: 0.418064
Iter 4/10: ladvise speed: 0.377152
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.409452
Iter 5/10: OSS cache speed: 0.440685
Iter 5/10: ladvise speed: 0.425255
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.369214
Iter 6/10: OSS cache speed: 0.414239
Iter 6/10: ladvise speed: 0.45243
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.417327
Iter 7/10: OSS cache speed: 0.41748
Iter 7/10: ladvise speed: 0.424794
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.334206
Iter 8/10: OSS cache speed: 0.394881
Iter 8/10: ladvise speed: 0.441328
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.377532
Iter 9/10: OSS cache speed: 0.45196
Iter 9/10: ladvise speed: 0.44771
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.415073
Iter 10/10: OSS cache speed: 0.438613
Iter 10/10: ladvise speed: 0.437567
Average uncached read: .39
Average speedup with OSS cached read:  .41 = +5%
Average speedup with ladvise willread:  .44 = +12%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0