== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:11:19 (1787137879)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.0369 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-ffff90f71884d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.423708
Iter 1/10: OSS cache speed: 0.466981
Iter 1/10: ladvise speed: 0.453664
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.441321
Iter 2/10: OSS cache speed: 0.461307
Iter 2/10: ladvise speed: 0.475564
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.403867
Iter 3/10: OSS cache speed: 0.448341
Iter 3/10: ladvise speed: 0.453635
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.375055
Iter 4/10: OSS cache speed: 0.366598
Iter 4/10: ladvise speed: 0.418868
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.352322
Iter 5/10: OSS cache speed: 0.462417
Iter 5/10: ladvise speed: 0.41989
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.434045
Iter 6/10: OSS cache speed: 0.500137
Iter 6/10: ladvise speed: 0.428059
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.416882
Iter 7/10: OSS cache speed: 0.475792
Iter 7/10: ladvise speed: 0.459822
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.418208
Iter 8/10: OSS cache speed: 0.439278
Iter 8/10: ladvise speed: 0.486191
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.421411
Iter 9/10: OSS cache speed: 0.463058
Iter 9/10: ladvise speed: 0.47444
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.410828
Iter 10/10: OSS cache speed: 0.471844
Iter 10/10: ladvise speed: 0.389533
Average uncached read: .40
Average speedup with OSS cached read:  .45 = +12%
Average speedup with ladvise willread:  .44 = +10%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0