== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:03:15 (1781211795)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.39081 s, 16.4 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-ffff8bf7042ea000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.677315
Iter 1/10: OSS cache speed: 0.65521
Iter 1/10: ladvise speed: 0.651357
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.633129
Iter 2/10: OSS cache speed: 0.614711
Iter 2/10: ladvise speed: 0.677207
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.638307
Iter 3/10: OSS cache speed: 0.646242
Iter 3/10: ladvise speed: 0.653757
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.612587
Iter 4/10: OSS cache speed: 0.623065
Iter 4/10: ladvise speed: 0.744001
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.720887
Iter 5/10: OSS cache speed: 0.565817
Iter 5/10: ladvise speed: 0.64615
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.646349
Iter 6/10: OSS cache speed: 0.760535
Iter 6/10: ladvise speed: 0.709664
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.712118
Iter 7/10: OSS cache speed: 0.844389
Iter 7/10: ladvise speed: 0.76546
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.820251
Iter 8/10: OSS cache speed: 0.787476
Iter 8/10: ladvise speed: 0.758506
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.750997
Iter 9/10: OSS cache speed: 0.654673
Iter 9/10: ladvise speed: 0.674385
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.699773
Iter 10/10: OSS cache speed: 0.662257
Iter 10/10: ladvise speed: 0.783636
Average uncached read: .69
Average speedup with OSS cached read:  .68 = +-1%
Average speedup with ladvise willread:  .70 = +1%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0