== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:56:22 (1786481782)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.0402 s, 9.5 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-ffff89cec9aaf000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.54951
Iter 1/10: OSS cache speed: 0.585717
Iter 1/10: ladvise speed: 0.581203
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.580184
Iter 2/10: OSS cache speed: 0.597636
Iter 2/10: ladvise speed: 0.618519
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.604369
Iter 3/10: OSS cache speed: 0.622088
Iter 3/10: ladvise speed: 0.608066
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.611615
Iter 4/10: OSS cache speed: 0.627398
Iter 4/10: ladvise speed: 0.702253
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.677575
Iter 5/10: OSS cache speed: 0.72615
Iter 5/10: ladvise speed: 0.781762
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.819423
Iter 6/10: OSS cache speed: 0.844204
Iter 6/10: ladvise speed: 0.856788
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.874238
Iter 7/10: OSS cache speed: 0.954657
Iter 7/10: ladvise speed: 1.18436
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.12549
Iter 8/10: OSS cache speed: 1.18886
Iter 8/10: ladvise speed: 1.53609
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.57385
Iter 9/10: OSS cache speed: 1.41314
Iter 9/10: ladvise speed: 1.66914
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.63295
Iter 10/10: OSS cache speed: 1.55702
Iter 10/10: ladvise speed: 1.81302
Average uncached read: .90
Average speedup with OSS cached read:  .91 = +1%
Average speedup with ladvise willread:  1.03 = +14%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0