== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:06:44 (1788181604)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.1997 s, 7.9 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-ffff89a202b86000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.40063
Iter 1/10: OSS cache speed: 0.373398
Iter 1/10: ladvise speed: 0.36597
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.359336
Iter 2/10: OSS cache speed: 0.391825
Iter 2/10: ladvise speed: 0.330655
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.405076
Iter 3/10: OSS cache speed: 0.383043
Iter 3/10: ladvise speed: 0.378844
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.370004
Iter 4/10: OSS cache speed: 0.327481
Iter 4/10: ladvise speed: 0.374079
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.35585
Iter 5/10: OSS cache speed: 0.382707
Iter 5/10: ladvise speed: 0.36677
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.301722
Iter 6/10: OSS cache speed: 0.350928
Iter 6/10: ladvise speed: 0.374915
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.358366
Iter 7/10: OSS cache speed: 0.393119
Iter 7/10: ladvise speed: 0.383426
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.363019
Iter 8/10: OSS cache speed: 0.375632
Iter 8/10: ladvise speed: 0.355032
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.330981
Iter 9/10: OSS cache speed: 0.360178
Iter 9/10: ladvise speed: 0.388863
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.352025
Iter 10/10: OSS cache speed: 0.345201
Iter 10/10: ladvise speed: 0.379035
Average uncached read: .35
Average speedup with OSS cached read:  .36 = +2%
Average speedup with ladvise willread:  .36 = +2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0