== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:31:14 (1786566674)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.7012 s, 10.8 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-ffff88bc98b4c800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.451763
Iter 1/10: OSS cache speed: 0.459154
Iter 1/10: ladvise speed: 0.476463
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.405891
Iter 2/10: OSS cache speed: 0.344378
Iter 2/10: ladvise speed: 0.402003
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.39137
Iter 3/10: OSS cache speed: 0.366284
Iter 3/10: ladvise speed: 0.423554
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.401407
Iter 4/10: OSS cache speed: 0.383968
Iter 4/10: ladvise speed: 0.372068
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.34898
Iter 5/10: OSS cache speed: 0.325132
Iter 5/10: ladvise speed: 0.433962
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.408454
Iter 6/10: OSS cache speed: 0.331131
Iter 6/10: ladvise speed: 0.3706
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.37152
Iter 7/10: OSS cache speed: 0.39901
Iter 7/10: ladvise speed: 0.367999
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.393636
Iter 8/10: OSS cache speed: 0.409537
Iter 8/10: ladvise speed: 0.40615
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.407252
Iter 9/10: OSS cache speed: 0.433162
Iter 9/10: ladvise speed: 0.417913
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.450585
Iter 10/10: OSS cache speed: 0.443675
Iter 10/10: ladvise speed: 0.456867
Average uncached read: .40
Average speedup with OSS cached read:  .38 = +-5%
Average speedup with ladvise willread:  .41 = +2%
Speedup with OSS cached read less than 20%,  got -5%. Skipping ladvise willread check.
fail_loc=0