== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:34:28 (1772422468)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.94883 s, 11.7 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-ffff8d0f08853800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.663535
Iter 1/10: OSS cache speed: 0.806963
Iter 1/10: ladvise speed: 0.959059
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.34709
Iter 2/10: OSS cache speed: 1.65124
Iter 2/10: ladvise speed: 1.71563
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.47015
Iter 3/10: OSS cache speed: 1.6946
Iter 3/10: ladvise speed: 1.6328
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.81371
Iter 4/10: OSS cache speed: 1.96766
Iter 4/10: ladvise speed: 2.09912
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.86046
Iter 5/10: OSS cache speed: 1.81421
Iter 5/10: ladvise speed: 1.74326
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.99618
Iter 6/10: OSS cache speed: 2.03884
Iter 6/10: ladvise speed: 1.95591
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.95353
Iter 7/10: OSS cache speed: 1.97076
Iter 7/10: ladvise speed: 1.96161
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.83751
Iter 8/10: OSS cache speed: 1.95282
Iter 8/10: ladvise speed: 1.98628
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.93316
Iter 9/10: OSS cache speed: 2.01883
Iter 9/10: ladvise speed: 1.96995
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.87045
Iter 10/10: OSS cache speed: 1.86877
Iter 10/10: ladvise speed: 1.97178
Average uncached read: 1.67
Average speedup with OSS cached read:  1.77 = +5%
Average speedup with ladvise willread:  1.79 = +7%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0