== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:17:33 (1786832253)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.12 s, 7.4 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-ffff8c1d845d5000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.358265
Iter 1/10: OSS cache speed: 0.397277
Iter 1/10: ladvise speed: 0.318271
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.34439
Iter 2/10: OSS cache speed: 0.327895
Iter 2/10: ladvise speed: 0.307076
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.353314
Iter 3/10: OSS cache speed: 0.303879
Iter 3/10: ladvise speed: 0.26683
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.274862
Iter 4/10: OSS cache speed: 0.304846
Iter 4/10: ladvise speed: 0.356151
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.334667
Iter 5/10: OSS cache speed: 0.351439
Iter 5/10: ladvise speed: 0.392221
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.335093
Iter 6/10: OSS cache speed: 0.395502
Iter 6/10: ladvise speed: 0.376613
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.392607
Iter 7/10: OSS cache speed: 0.383734
Iter 7/10: ladvise speed: 0.383919
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.325253
Iter 8/10: OSS cache speed: 0.352904
Iter 8/10: ladvise speed: 0.407682
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.388811
Iter 9/10: OSS cache speed: 0.373947
Iter 9/10: ladvise speed: 0.392388
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.313571
Iter 10/10: OSS cache speed: 0.392202
Iter 10/10: ladvise speed: 0.41017
Average uncached read: .34
Average speedup with OSS cached read:  .35 = +2%
Average speedup with ladvise willread:  .36 = +5%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0