== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:25:31 (1786404331)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.0998 s, 7.4 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-ffff90cfc70ac800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.346876
Iter 1/10: OSS cache speed: 0.315565
Iter 1/10: ladvise speed: 0.404149
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.298123
Iter 2/10: OSS cache speed: 0.362423
Iter 2/10: ladvise speed: 0.353696
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.277862
Iter 3/10: OSS cache speed: 0.361057
Iter 3/10: ladvise speed: 0.382387
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.293558
Iter 4/10: OSS cache speed: 0.314004
Iter 4/10: ladvise speed: 0.287072
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.353188
Iter 5/10: OSS cache speed: 0.382955
Iter 5/10: ladvise speed: 0.353634
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.37871
Iter 6/10: OSS cache speed: 0.379115
Iter 6/10: ladvise speed: 0.414628
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.344321
Iter 7/10: OSS cache speed: 0.446361
Iter 7/10: ladvise speed: 0.355249
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.361166
Iter 8/10: OSS cache speed: 0.410607
Iter 8/10: ladvise speed: 0.463968
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.410033
Iter 9/10: OSS cache speed: 0.422143
Iter 9/10: ladvise speed: 0.441064
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.390846
Iter 10/10: OSS cache speed: 0.358266
Iter 10/10: ladvise speed: 0.350959
Average uncached read: .34
Average speedup with OSS cached read:  .37 = +8%
Average speedup with ladvise willread:  .38 = +11%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0