== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:52:32 (1780998752)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.2634 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-ffff9fa091244000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.280147
Iter 1/10: OSS cache speed: 0.325869
Iter 1/10: ladvise speed: 0.301194
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.272038
Iter 2/10: OSS cache speed: 0.332213
Iter 2/10: ladvise speed: 0.340505
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.256398
Iter 3/10: OSS cache speed: 0.31622
Iter 3/10: ladvise speed: 0.347653
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.291126
Iter 4/10: OSS cache speed: 0.36652
Iter 4/10: ladvise speed: 0.341963
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.313704
Iter 5/10: OSS cache speed: 0.342312
Iter 5/10: ladvise speed: 0.334461
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.312464
Iter 6/10: OSS cache speed: 0.385899
Iter 6/10: ladvise speed: 0.375902
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.311257
Iter 7/10: OSS cache speed: 0.3674
Iter 7/10: ladvise speed: 0.352091
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.335853
Iter 8/10: OSS cache speed: 0.357197
Iter 8/10: ladvise speed: 0.338314
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.348943
Iter 9/10: OSS cache speed: 0.396083
Iter 9/10: ladvise speed: 0.387247
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.364393
Iter 10/10: OSS cache speed: 0.384584
Iter 10/10: ladvise speed: 0.418386
Average uncached read: .30
Average speedup with OSS cached read:  .35 = +16%
Average speedup with ladvise willread:  .35 = +16%
Speedup with OSS cached read less than 20%,  got 16%. Skipping ladvise willread check.
fail_loc=0