== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:05:30 (1788847530)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 16.6216 s, 6.3 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-ffff8fa2984b0000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.274276
Iter 1/10: OSS cache speed: 0.359422
Iter 1/10: ladvise speed: 0.391698
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.350965
Iter 2/10: OSS cache speed: 0.410042
Iter 2/10: ladvise speed: 0.3822
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.312339
Iter 3/10: OSS cache speed: 0.318617
Iter 3/10: ladvise speed: 0.390135
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.316737
Iter 4/10: OSS cache speed: 0.370557
Iter 4/10: ladvise speed: 0.370713
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.299708
Iter 5/10: OSS cache speed: 0.299886
Iter 5/10: ladvise speed: 0.345089
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.342769
Iter 6/10: OSS cache speed: 0.401026
Iter 6/10: ladvise speed: 0.400235
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.328468
Iter 7/10: OSS cache speed: 0.397356
Iter 7/10: ladvise speed: 0.427774
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.405164
Iter 8/10: OSS cache speed: 0.421942
Iter 8/10: ladvise speed: 0.413462
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.384995
Iter 9/10: OSS cache speed: 0.413844
Iter 9/10: ladvise speed: 0.451368
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.392735
Iter 10/10: OSS cache speed: 0.484782
Iter 10/10: ladvise speed: 0.474102
Average uncached read: .34
Average speedup with OSS cached read:  .38 = +11%
Average speedup with ladvise willread:  .40 = +17%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0