== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:06:10 (1787396770)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.9437 s, 8.1 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-ffff9987d8c2c000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.335102
Iter 1/10: OSS cache speed: 0.329846
Iter 1/10: ladvise speed: 0.360638
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.334095
Iter 2/10: OSS cache speed: 0.34505
Iter 2/10: ladvise speed: 0.367032
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.32612
Iter 3/10: OSS cache speed: 0.332767
Iter 3/10: ladvise speed: 0.336262
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.291799
Iter 4/10: OSS cache speed: 0.32209
Iter 4/10: ladvise speed: 0.273992
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.303111
Iter 5/10: OSS cache speed: 0.306248
Iter 5/10: ladvise speed: 0.296769
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.306334
Iter 6/10: OSS cache speed: 0.300964
Iter 6/10: ladvise speed: 0.282112
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.296073
Iter 7/10: OSS cache speed: 0.308063
Iter 7/10: ladvise speed: 0.273997
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.279585
Iter 8/10: OSS cache speed: 0.269933
Iter 8/10: ladvise speed: 0.313702
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.344902
Iter 9/10: OSS cache speed: 0.289407
Iter 9/10: ladvise speed: 0.29782
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.3103
Iter 10/10: OSS cache speed: 0.335249
Iter 10/10: ladvise speed: 0.286129
Average uncached read: .31
Average speedup with OSS cached read:  .31 = +0%
Average speedup with ladvise willread:  .30 = +-3%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0