== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:27:25 (1772468845)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.22898 s, 14.5 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-ffff8ec4034f2800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.746187
Iter 1/10: OSS cache speed: 0.775417
Iter 1/10: ladvise speed: 0.858658
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.790406
Iter 2/10: OSS cache speed: 0.691333
Iter 2/10: ladvise speed: 0.71531
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.451958
Iter 3/10: OSS cache speed: 0.500176
Iter 3/10: ladvise speed: 0.532527
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.263609
Iter 4/10: OSS cache speed: 0.398209
Iter 4/10: ladvise speed: 0.407239
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.387829
Iter 5/10: OSS cache speed: 0.308175
Iter 5/10: ladvise speed: 0.366075
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.417867
Iter 6/10: OSS cache speed: 0.331104
Iter 6/10: ladvise speed: 0.376143
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.356054
Iter 7/10: OSS cache speed: 0.412795
Iter 7/10: ladvise speed: 0.385523
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.370641
Iter 8/10: OSS cache speed: 0.444987
Iter 8/10: ladvise speed: 0.463902
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.393885
Iter 9/10: OSS cache speed: 0.4255
Iter 9/10: ladvise speed: 0.458869
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.448378
Iter 10/10: OSS cache speed: 0.440051
Iter 10/10: ladvise speed: 0.377238
Average uncached read: .46
Average speedup with OSS cached read:  .47 = +2%
Average speedup with ladvise willread:  .49 = +6%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0