== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:37:30 (1787837850)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.9613 s, 8.1 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-ffff8d3dc387a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.442538
Iter 1/10: OSS cache speed: 0.460927
Iter 1/10: ladvise speed: 0.415417
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.430762
Iter 2/10: OSS cache speed: 0.410948
Iter 2/10: ladvise speed: 0.382054
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.39285
Iter 3/10: OSS cache speed: 0.416365
Iter 3/10: ladvise speed: 0.402331
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.400009
Iter 4/10: OSS cache speed: 0.417989
Iter 4/10: ladvise speed: 0.384176
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.374522
Iter 5/10: OSS cache speed: 0.394836
Iter 5/10: ladvise speed: 0.322062
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.41732
Iter 6/10: OSS cache speed: 0.439904
Iter 6/10: ladvise speed: 0.434192
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.356805
Iter 7/10: OSS cache speed: 0.445061
Iter 7/10: ladvise speed: 0.391515
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.395839
Iter 8/10: OSS cache speed: 0.394991
Iter 8/10: ladvise speed: 0.402417
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.365555
Iter 9/10: OSS cache speed: 0.397563
Iter 9/10: ladvise speed: 0.375027
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.372845
Iter 10/10: OSS cache speed: 0.43393
Iter 10/10: ladvise speed: 0.431167
Average uncached read: .39
Average speedup with OSS cached read:  .42 = +7%
Average speedup with ladvise willread:  .39 = +0%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0