== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:09:40 (1759820980)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.88796 s, 17.8 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-ffff9d32d13e9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.38664
Iter 1/10: OSS cache speed: 2.44022
Iter 1/10: ladvise speed: 1.90347
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.08459
Iter 2/10: OSS cache speed: 2.47781
Iter 2/10: ladvise speed: 2.40908
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.28458
Iter 3/10: OSS cache speed: 2.59592
Iter 3/10: ladvise speed: 2.56394
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.28576
Iter 4/10: OSS cache speed: 2.02004
Iter 4/10: ladvise speed: 2.41006
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.1338
Iter 5/10: OSS cache speed: 2.27105
Iter 5/10: ladvise speed: 1.86798
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.02664
Iter 6/10: OSS cache speed: 1.99154
Iter 6/10: ladvise speed: 2.2932
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.36082
Iter 7/10: OSS cache speed: 2.5536
Iter 7/10: ladvise speed: 2.54113
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.4455
Iter 8/10: OSS cache speed: 2.51217
Iter 8/10: ladvise speed: 2.34382
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.14375
Iter 9/10: OSS cache speed: 2.56852
Iter 9/10: ladvise speed: 2.53974
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.19524
Iter 10/10: OSS cache speed: 2.48336
Iter 10/10: ladvise speed: 2.59434
Average uncached read: 2.23
Average speedup with OSS cached read:  2.39 = +7%
Average speedup with ladvise willread:  2.34 = +4%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0