== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:44:00 (1729089840)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.86247 s, 36.6 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-ffff8800b37cb800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.99317
Iter 1/10: OSS cache speed: 3.10759
Iter 1/10: ladvise speed: 2.11534
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.18055
Iter 2/10: OSS cache speed: 2.50497
Iter 2/10: ladvise speed: 2.08158
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.04137
Iter 3/10: OSS cache speed: 2.32908
Iter 3/10: ladvise speed: 2.75893
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.23564
Iter 4/10: OSS cache speed: 3.05526
Iter 4/10: ladvise speed: 1.98971
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.78094
Iter 5/10: OSS cache speed: 1.80141
Iter 5/10: ladvise speed: 1.71108
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.7195
Iter 6/10: OSS cache speed: 1.52882
Iter 6/10: ladvise speed: 1.76155
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.70494
Iter 7/10: OSS cache speed: 1.73652
Iter 7/10: ladvise speed: 1.63957
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.7952
Iter 8/10: OSS cache speed: 1.97587
Iter 8/10: ladvise speed: 2.04764
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.64796
Iter 9/10: OSS cache speed: 1.0232
Iter 9/10: ladvise speed: 1.61381
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.15942
Iter 10/10: OSS cache speed: 1.43576
Iter 10/10: ladvise speed: 1.41249
Average uncached read: 1.92
Average speedup with OSS cached read: 2.04 = +6.25%
Average speedup with ladvise willread: 1.91 = +-.52%
Speedup with OSS cached read less than 20%, got 6.25%. Skipping ladvise willread check.
fail_loc=0