== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:26:46 (1758824806)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.55847 s, 18.9 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-ffff95358418b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.17744
Iter 1/10: OSS cache speed: 2.30656
Iter 1/10: ladvise speed: 2.45908
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.1971
Iter 2/10: OSS cache speed: 2.37121
Iter 2/10: ladvise speed: 2.15036
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.55128
Iter 3/10: OSS cache speed: 2.13126
Iter 3/10: ladvise speed: 2.32844
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.69474
Iter 4/10: OSS cache speed: 2.23915
Iter 4/10: ladvise speed: 2.42947
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.21213
Iter 5/10: OSS cache speed: 2.46542
Iter 5/10: ladvise speed: 2.45533
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.30798
Iter 6/10: OSS cache speed: 2.47835
Iter 6/10: ladvise speed: 2.47111
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.34215
Iter 7/10: OSS cache speed: 2.55872
Iter 7/10: ladvise speed: 2.5013
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.33232
Iter 8/10: OSS cache speed: 2.26343
Iter 8/10: ladvise speed: 2.58664
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.53778
Iter 9/10: OSS cache speed: 2.50862
Iter 9/10: ladvise speed: 2.52775
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.29149
Iter 10/10: OSS cache speed: 2.49555
Iter 10/10: ladvise speed: 2.54915
Average uncached read: 2.16
Average speedup with OSS cached read:  2.38 = +10%
Average speedup with ladvise willread:  2.44 = +12%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0