== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:45:19 (1781235919)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.901 s, 9.6 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-ffff948a05f77000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.331449
Iter 1/10: OSS cache speed: 0.378749
Iter 1/10: ladvise speed: 0.370317
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.289221
Iter 2/10: OSS cache speed: 0.380488
Iter 2/10: ladvise speed: 0.361263
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.300214
Iter 3/10: OSS cache speed: 0.355136
Iter 3/10: ladvise speed: 0.337498
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.278605
Iter 4/10: OSS cache speed: 0.356367
Iter 4/10: ladvise speed: 0.357743
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.318383
Iter 5/10: OSS cache speed: 0.335051
Iter 5/10: ladvise speed: 0.324146
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.344137
Iter 6/10: OSS cache speed: 0.346319
Iter 6/10: ladvise speed: 0.364529
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.313997
Iter 7/10: OSS cache speed: 0.34059
Iter 7/10: ladvise speed: 0.322663
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.308142
Iter 8/10: OSS cache speed: 0.335299
Iter 8/10: ladvise speed: 0.351071
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.274572
Iter 9/10: OSS cache speed: 0.297786
Iter 9/10: ladvise speed: 0.311507
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.281258
Iter 10/10: OSS cache speed: 0.344769
Iter 10/10: ladvise speed: 0.312365
Average uncached read: .30
Average speedup with OSS cached read:  .34 = +13%
Average speedup with ladvise willread:  .34 = +13%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0