== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:25:16 (1787858716)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.1452 s, 8.6 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-ffff9cf398f33800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.460649
Iter 1/10: OSS cache speed: 0.478165
Iter 1/10: ladvise speed: 0.493913
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.494516
Iter 2/10: OSS cache speed: 0.484484
Iter 2/10: ladvise speed: 0.507434
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.375435
Iter 3/10: OSS cache speed: 0.399672
Iter 3/10: ladvise speed: 0.418175
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.358924
Iter 4/10: OSS cache speed: 0.397179
Iter 4/10: ladvise speed: 0.323951
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.338654
Iter 5/10: OSS cache speed: 0.427315
Iter 5/10: ladvise speed: 0.426565
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.394234
Iter 6/10: OSS cache speed: 0.448571
Iter 6/10: ladvise speed: 0.430499
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.470035
Iter 7/10: OSS cache speed: 0.536521
Iter 7/10: ladvise speed: 0.515626
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.438578
Iter 8/10: OSS cache speed: 0.510981
Iter 8/10: ladvise speed: 0.483988
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.483047
Iter 9/10: OSS cache speed: 0.471661
Iter 9/10: ladvise speed: 0.484759
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.388253
Iter 10/10: OSS cache speed: 0.466988
Iter 10/10: ladvise speed: 0.414827
Average uncached read: .42
Average speedup with OSS cached read:  .46 = +9%
Average speedup with ladvise willread:  .44 = +4%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0