== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:51:31 (1745621491)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 7.12872 s, 14.7 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-ffff8800b6156800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.545451
Iter 1/10: OSS cache speed: 0.590225
Iter 1/10: ladvise speed: 0.576604
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.522037
Iter 2/10: OSS cache speed: 0.586137
Iter 2/10: ladvise speed: 0.655342
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.611532
Iter 3/10: OSS cache speed: 0.670639
Iter 3/10: ladvise speed: 0.714747
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.621481
Iter 4/10: OSS cache speed: 0.684836
Iter 4/10: ladvise speed: 0.692919
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.652934
Iter 5/10: OSS cache speed: 0.694425
Iter 5/10: ladvise speed: 0.801369
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.616128
Iter 6/10: OSS cache speed: 0.610225
Iter 6/10: ladvise speed: 0.667285
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.624591
Iter 7/10: OSS cache speed: 0.642833
Iter 7/10: ladvise speed: 0.648549
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.606769
Iter 8/10: OSS cache speed: 0.779391
Iter 8/10: ladvise speed: 0.798178
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.800839
Iter 9/10: OSS cache speed: 0.905543
Iter 9/10: ladvise speed: 1.0401
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.871738
Iter 10/10: OSS cache speed: 1.03075
Iter 10/10: ladvise speed: 1.05609
Average uncached read: .64
Average speedup with OSS cached read:  .71 = +10%
Average speedup with ladvise willread:  .76 = +18%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0