== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:26:42 (1774877202)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.63395 s, 10.9 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-ffff99d289ac0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.394754
Iter 1/10: OSS cache speed: 0.432949
Iter 1/10: ladvise speed: 0.3854
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.380724
Iter 2/10: OSS cache speed: 0.384077
Iter 2/10: ladvise speed: 0.470433
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.365411
Iter 3/10: OSS cache speed: 0.407981
Iter 3/10: ladvise speed: 0.326213
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.350782
Iter 4/10: OSS cache speed: 0.346045
Iter 4/10: ladvise speed: 0.385407
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.315774
Iter 5/10: OSS cache speed: 0.343606
Iter 5/10: ladvise speed: 0.328247
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.367192
Iter 6/10: OSS cache speed: 0.352717
Iter 6/10: ladvise speed: 0.360936
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.306301
Iter 7/10: OSS cache speed: 0.378477
Iter 7/10: ladvise speed: 0.34452
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.342748
Iter 8/10: OSS cache speed: 0.425185
Iter 8/10: ladvise speed: 0.323212
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.312693
Iter 9/10: OSS cache speed: 0.37422
Iter 9/10: ladvise speed: 0.373328
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.311143
Iter 10/10: OSS cache speed: 0.315493
Iter 10/10: ladvise speed: 0.344487
Average uncached read: .34
Average speedup with OSS cached read:  .37 = +8%
Average speedup with ladvise willread:  .36 = +5%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0