== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:30:22 (1790739022)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4472 s, 8.4 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-ffff8a0495738000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.386088
Iter 1/10: OSS cache speed: 0.366835
Iter 1/10: ladvise speed: 0.452322
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.411937
Iter 2/10: OSS cache speed: 0.423437
Iter 2/10: ladvise speed: 0.42645
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.411812
Iter 3/10: OSS cache speed: 0.452826
Iter 3/10: ladvise speed: 0.487273
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.405818
Iter 4/10: OSS cache speed: 0.400197
Iter 4/10: ladvise speed: 0.399738
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.344857
Iter 5/10: OSS cache speed: 0.435554
Iter 5/10: ladvise speed: 0.362449
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.390803
Iter 6/10: OSS cache speed: 0.41874
Iter 6/10: ladvise speed: 0.45502
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.389279
Iter 7/10: OSS cache speed: 0.439447
Iter 7/10: ladvise speed: 0.393656
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.364861
Iter 8/10: OSS cache speed: 0.434528
Iter 8/10: ladvise speed: 0.442814
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.3477
Iter 9/10: OSS cache speed: 0.34249
Iter 9/10: ladvise speed: 0.38811
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.407596
Iter 10/10: OSS cache speed: 0.436394
Iter 10/10: ladvise speed: 0.389177
Average uncached read: .38
Average speedup with OSS cached read:  .41 = +7%
Average speedup with ladvise willread:  .41 = +7%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0