== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:53:59 (1781229239)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.9113 s, 7.0 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-ffff8d5912eb0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.307133
Iter 1/10: OSS cache speed: 0.359909
Iter 1/10: ladvise speed: 0.341066
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.344198
Iter 2/10: OSS cache speed: 0.3752
Iter 2/10: ladvise speed: 0.356401
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.357327
Iter 3/10: OSS cache speed: 0.367113
Iter 3/10: ladvise speed: 0.340043
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.359933
Iter 4/10: OSS cache speed: 0.397473
Iter 4/10: ladvise speed: 0.419561
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.353035
Iter 5/10: OSS cache speed: 0.386427
Iter 5/10: ladvise speed: 0.401898
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.333531
Iter 6/10: OSS cache speed: 0.352646
Iter 6/10: ladvise speed: 0.328084
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.346385
Iter 7/10: OSS cache speed: 0.333498
Iter 7/10: ladvise speed: 0.359688
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.366114
Iter 8/10: OSS cache speed: 0.386338
Iter 8/10: ladvise speed: 0.37217
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.332566
Iter 9/10: OSS cache speed: 0.357004
Iter 9/10: ladvise speed: 0.295054
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.293795
Iter 10/10: OSS cache speed: 0.310171
Iter 10/10: ladvise speed: 0.329912
Average uncached read: .33
Average speedup with OSS cached read:  .36 = +9%
Average speedup with ladvise willread:  .35 = +6%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0