== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:36:30 (1785947790)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.4954 s, 6.8 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-ffff8e1807d3a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.313754
Iter 1/10: OSS cache speed: 0.290007
Iter 1/10: ladvise speed: 0.243801
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.312898
Iter 2/10: OSS cache speed: 0.240347
Iter 2/10: ladvise speed: 0.222446
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.27954
Iter 3/10: OSS cache speed: 0.245311
Iter 3/10: ladvise speed: 0.221328
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.266873
Iter 4/10: OSS cache speed: 0.266313
Iter 4/10: ladvise speed: 0.232317
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.25024
Iter 5/10: OSS cache speed: 0.265714
Iter 5/10: ladvise speed: 0.243948
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.231312
Iter 6/10: OSS cache speed: 0.227066
Iter 6/10: ladvise speed: 0.243692
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.237009
Iter 7/10: OSS cache speed: 0.259459
Iter 7/10: ladvise speed: 0.249444
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.188815
Iter 8/10: OSS cache speed: 0.221456
Iter 8/10: ladvise speed: 0.24885
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.233193
Iter 9/10: OSS cache speed: 0.232547
Iter 9/10: ladvise speed: 0.290702
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.269658
Iter 10/10: OSS cache speed: 0.268208
Iter 10/10: ladvise speed: 0.204049
Average uncached read: .25
Average speedup with OSS cached read:  .25 = +0%
Average speedup with ladvise willread:  .24 = +-4%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0