== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:50:10 (1787737810)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.8298 s, 8.9 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-ffffa06d87226800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.376229
Iter 1/10: OSS cache speed: 0.38874
Iter 1/10: ladvise speed: 0.392485
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.392197
Iter 2/10: OSS cache speed: 0.408754
Iter 2/10: ladvise speed: 0.414363
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.422789
Iter 3/10: OSS cache speed: 0.425402
Iter 3/10: ladvise speed: 0.387067
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.412113
Iter 4/10: OSS cache speed: 0.421989
Iter 4/10: ladvise speed: 0.397791
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.404742
Iter 5/10: OSS cache speed: 0.410074
Iter 5/10: ladvise speed: 0.41456
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.449683
Iter 6/10: OSS cache speed: 0.438776
Iter 6/10: ladvise speed: 0.440523
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.342426
Iter 7/10: OSS cache speed: 0.408292
Iter 7/10: ladvise speed: 0.391712
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.397231
Iter 8/10: OSS cache speed: 0.426622
Iter 8/10: ladvise speed: 0.339239
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.377494
Iter 9/10: OSS cache speed: 0.413558
Iter 9/10: ladvise speed: 0.416961
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.401987
Iter 10/10: OSS cache speed: 0.384093
Iter 10/10: ladvise speed: 0.39398
Average uncached read: .39
Average speedup with OSS cached read:  .41 = +5%
Average speedup with ladvise willread:  .39 = +0%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0