== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:22:39 (1782242559)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.566 s, 9.1 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-ffff8b30d0892800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.367425
Iter 1/10: OSS cache speed: 0.36668
Iter 1/10: ladvise speed: 0.37092
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.35654
Iter 2/10: OSS cache speed: 0.372604
Iter 2/10: ladvise speed: 0.31172
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.291119
Iter 3/10: OSS cache speed: 0.315865
Iter 3/10: ladvise speed: 0.359663
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.355496
Iter 4/10: OSS cache speed: 0.372499
Iter 4/10: ladvise speed: 0.368616
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.339042
Iter 5/10: OSS cache speed: 0.330548
Iter 5/10: ladvise speed: 0.350755
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.344955
Iter 6/10: OSS cache speed: 0.301704
Iter 6/10: ladvise speed: 0.341162
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.300609
Iter 7/10: OSS cache speed: 0.343318
Iter 7/10: ladvise speed: 0.37415
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.336362
Iter 8/10: OSS cache speed: 0.324144
Iter 8/10: ladvise speed: 0.337713
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.329013
Iter 9/10: OSS cache speed: 0.352974
Iter 9/10: ladvise speed: 0.334654
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.349011
Iter 10/10: OSS cache speed: 0.340259
Iter 10/10: ladvise speed: 0.3248
Average uncached read: .33
Average speedup with OSS cached read:  .34 = +3%
Average speedup with ladvise willread:  .34 = +3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0