== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:17:02 (1789676222)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.5697 s, 7.2 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-ffff9ee6996f4800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.290203
Iter 1/10: OSS cache speed: 0.266356
Iter 1/10: ladvise speed: 0.301235
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.275724
Iter 2/10: OSS cache speed: 0.279561
Iter 2/10: ladvise speed: 0.296936
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.286736
Iter 3/10: OSS cache speed: 0.322191
Iter 3/10: ladvise speed: 0.317585
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.298418
Iter 4/10: OSS cache speed: 0.314099
Iter 4/10: ladvise speed: 0.323208
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.297944
Iter 5/10: OSS cache speed: 0.276754
Iter 5/10: ladvise speed: 0.272005
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.298575
Iter 6/10: OSS cache speed: 0.291782
Iter 6/10: ladvise speed: 0.284718
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.314312
Iter 7/10: OSS cache speed: 0.279099
Iter 7/10: ladvise speed: 0.279435
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.318171
Iter 8/10: OSS cache speed: 0.31479
Iter 8/10: ladvise speed: 0.29813
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.322478
Iter 9/10: OSS cache speed: 0.334814
Iter 9/10: ladvise speed: 0.298573
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.325366
Iter 10/10: OSS cache speed: 0.306057
Iter 10/10: ladvise speed: 0.350691
Average uncached read: .30
Average speedup with OSS cached read:  .29 = +-3%
Average speedup with ladvise willread:  .30 = +0%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0