== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:10:34 (1788837034)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.0346 s, 8.0 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-ffff91d6456b9000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.407813
Iter 1/10: OSS cache speed: 0.445977
Iter 1/10: ladvise speed: 0.371914
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.354265
Iter 2/10: OSS cache speed: 0.347789
Iter 2/10: ladvise speed: 0.389453
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.443643
Iter 3/10: OSS cache speed: 0.481624
Iter 3/10: ladvise speed: 0.511006
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.471374
Iter 4/10: OSS cache speed: 0.520527
Iter 4/10: ladvise speed: 0.45356
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.475926
Iter 5/10: OSS cache speed: 0.501674
Iter 5/10: ladvise speed: 0.417907
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.348485
Iter 6/10: OSS cache speed: 0.544416
Iter 6/10: ladvise speed: 0.425329
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.45167
Iter 7/10: OSS cache speed: 0.450908
Iter 7/10: ladvise speed: 0.389285
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.482713
Iter 8/10: OSS cache speed: 0.495948
Iter 8/10: ladvise speed: 0.421767
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.476085
Iter 9/10: OSS cache speed: 0.438508
Iter 9/10: ladvise speed: 0.54668
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.475272
Iter 10/10: OSS cache speed: 0.52656
Iter 10/10: ladvise speed: 0.467391
Average uncached read: .43
Average speedup with OSS cached read:  .47 = +9%
Average speedup with ladvise willread:  .43 = +0%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0