== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:36:52 (1788867412)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.78764 s, 15.4 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-ffff8934a0196800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.32865
Iter 1/10: OSS cache speed: 1.24594
Iter 1/10: ladvise speed: 1.17183
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.876827
Iter 2/10: OSS cache speed: 1.02763
Iter 2/10: ladvise speed: 0.936634
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.715849
Iter 3/10: OSS cache speed: 0.893871
Iter 3/10: ladvise speed: 1.151
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.972424
Iter 4/10: OSS cache speed: 1.04769
Iter 4/10: ladvise speed: 1.04701
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.790248
Iter 5/10: OSS cache speed: 0.986643
Iter 5/10: ladvise speed: 0.9949
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.910896
Iter 6/10: OSS cache speed: 1.04849
Iter 6/10: ladvise speed: 1.1605
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.945242
Iter 7/10: OSS cache speed: 1.07321
Iter 7/10: ladvise speed: 1.05866
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.846895
Iter 8/10: OSS cache speed: 1.10966
Iter 8/10: ladvise speed: 1.37214
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.907801
Iter 9/10: OSS cache speed: 0.975118
Iter 9/10: ladvise speed: 1.00909
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.878101
Iter 10/10: OSS cache speed: 0.941828
Iter 10/10: ladvise speed: 1.09636
Average uncached read: .91
Average speedup with OSS cached read:  1.03 = +13%
Average speedup with ladvise willread:  1.09 = +19%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0