== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:00:54 (1789610454)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.2115 s, 9.4 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-ffff91ad1832d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.414743
Iter 1/10: OSS cache speed: 0.459447
Iter 1/10: ladvise speed: 0.425544
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.418999
Iter 2/10: OSS cache speed: 0.415243
Iter 2/10: ladvise speed: 0.401826
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.414404
Iter 3/10: OSS cache speed: 0.419823
Iter 3/10: ladvise speed: 0.411848
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.374933
Iter 4/10: OSS cache speed: 0.398211
Iter 4/10: ladvise speed: 0.408697
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.422573
Iter 5/10: OSS cache speed: 0.41376
Iter 5/10: ladvise speed: 0.418038
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.397767
Iter 6/10: OSS cache speed: 0.434077
Iter 6/10: ladvise speed: 0.354421
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.36946
Iter 7/10: OSS cache speed: 0.400408
Iter 7/10: ladvise speed: 0.354828
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.396389
Iter 8/10: OSS cache speed: 0.395204
Iter 8/10: ladvise speed: 0.444036
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.379177
Iter 9/10: OSS cache speed: 0.375018
Iter 9/10: ladvise speed: 0.296168
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.351487
Iter 10/10: OSS cache speed: 0.40219
Iter 10/10: ladvise speed: 0.38163
Average uncached read: .39
Average speedup with OSS cached read:  .41 = +5%
Average speedup with ladvise willread:  .38 = +-2%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0