== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:25:29 (1788287129)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.1546 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-ffff92dd87f72000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.320563
Iter 1/10: OSS cache speed: 0.414204
Iter 1/10: ladvise speed: 0.386565
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.345066
Iter 2/10: OSS cache speed: 0.375347
Iter 2/10: ladvise speed: 0.399804
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.386507
Iter 3/10: OSS cache speed: 0.406557
Iter 3/10: ladvise speed: 0.414686
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.356352
Iter 4/10: OSS cache speed: 0.367095
Iter 4/10: ladvise speed: 0.437258
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.344238
Iter 5/10: OSS cache speed: 0.415175
Iter 5/10: ladvise speed: 0.433527
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.413629
Iter 6/10: OSS cache speed: 0.459981
Iter 6/10: ladvise speed: 0.454322
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.435904
Iter 7/10: OSS cache speed: 0.47636
Iter 7/10: ladvise speed: 0.492833
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.418244
Iter 8/10: OSS cache speed: 0.490043
Iter 8/10: ladvise speed: 0.44769
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.396756
Iter 9/10: OSS cache speed: 0.386978
Iter 9/10: ladvise speed: 0.384202
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.354535
Iter 10/10: OSS cache speed: 0.345157
Iter 10/10: ladvise speed: 0.431027
Average uncached read: .37
Average speedup with OSS cached read:  .41 = +10%
Average speedup with ladvise willread:  .42 = +13%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0