== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:02:59 (1787695379)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.2551 s, 8.6 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-ffff9c0b526b9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.369153
Iter 1/10: OSS cache speed: 0.403677
Iter 1/10: ladvise speed: 0.365568
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.412239
Iter 2/10: OSS cache speed: 0.398151
Iter 2/10: ladvise speed: 0.46153
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.357936
Iter 3/10: OSS cache speed: 0.388999
Iter 3/10: ladvise speed: 0.272392
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.365114
Iter 4/10: OSS cache speed: 0.320596
Iter 4/10: ladvise speed: 0.32801
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.380926
Iter 5/10: OSS cache speed: 0.290299
Iter 5/10: ladvise speed: 0.354022
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.420014
Iter 6/10: OSS cache speed: 0.277965
Iter 6/10: ladvise speed: 0.26885
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.337037
Iter 7/10: OSS cache speed: 0.330342
Iter 7/10: ladvise speed: 0.37396
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.372954
Iter 8/10: OSS cache speed: 0.356403
Iter 8/10: ladvise speed: 0.269161
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.333207
Iter 9/10: OSS cache speed: 0.393397
Iter 9/10: ladvise speed: 0.29537
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.353115
Iter 10/10: OSS cache speed: 0.420147
Iter 10/10: ladvise speed: 0.383579
Average uncached read: .37
Average speedup with OSS cached read:  .35 = +-5%
Average speedup with ladvise willread:  .33 = +-10%
Speedup with OSS cached read less than 20%,  got -5%. Skipping ladvise willread check.
fail_loc=0