== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:53:33 (1779695613)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.0066 s, 9.5 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-ffff8ba3c7f36000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.339408
Iter 1/10: OSS cache speed: 0.417237
Iter 1/10: ladvise speed: 0.438562
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.359035
Iter 2/10: OSS cache speed: 0.420648
Iter 2/10: ladvise speed: 0.343826
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.3699
Iter 3/10: OSS cache speed: 0.34998
Iter 3/10: ladvise speed: 0.376002
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.359223
Iter 4/10: OSS cache speed: 0.399688
Iter 4/10: ladvise speed: 0.394822
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.334128
Iter 5/10: OSS cache speed: 0.36377
Iter 5/10: ladvise speed: 0.420712
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.360225
Iter 6/10: OSS cache speed: 0.404432
Iter 6/10: ladvise speed: 0.415862
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.274809
Iter 7/10: OSS cache speed: 0.41381
Iter 7/10: ladvise speed: 0.400753
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.344668
Iter 8/10: OSS cache speed: 0.376481
Iter 8/10: ladvise speed: 0.335455
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.323117
Iter 9/10: OSS cache speed: 0.373129
Iter 9/10: ladvise speed: 0.336033
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.329294
Iter 10/10: OSS cache speed: 0.340456
Iter 10/10: ladvise speed: 0.33224
Average uncached read: .33
Average speedup with OSS cached read:  .38 = +15%
Average speedup with ladvise willread:  .37 = +12%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0