== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:34:57 (1786185297)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.835 s, 8.2 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-ffff89ac215cc000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.383921
Iter 1/10: OSS cache speed: 0.345596
Iter 1/10: ladvise speed: 0.478014
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.426484
Iter 2/10: OSS cache speed: 0.366723
Iter 2/10: ladvise speed: 0.397017
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.390078
Iter 3/10: OSS cache speed: 0.37284
Iter 3/10: ladvise speed: 0.397292
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.399502
Iter 4/10: OSS cache speed: 0.389502
Iter 4/10: ladvise speed: 0.431996
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.357143
Iter 5/10: OSS cache speed: 0.433015
Iter 5/10: ladvise speed: 0.419753
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.337977
Iter 6/10: OSS cache speed: 0.45011
Iter 6/10: ladvise speed: 0.368586
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.344094
Iter 7/10: OSS cache speed: 0.387987
Iter 7/10: ladvise speed: 0.396853
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.377596
Iter 8/10: OSS cache speed: 0.445092
Iter 8/10: ladvise speed: 0.44088
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.358831
Iter 9/10: OSS cache speed: 0.340173
Iter 9/10: ladvise speed: 0.389603
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.294144
Iter 10/10: OSS cache speed: 0.352149
Iter 10/10: ladvise speed: 0.31583
Average uncached read: .36
Average speedup with OSS cached read:  .38 = +5%
Average speedup with ladvise willread:  .40 = +11%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0