== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:03:40 (1787742220)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.4239 s, 7.8 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-ffff93e6c79e7800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.29341
Iter 1/10: OSS cache speed: 0.221597
Iter 1/10: ladvise speed: 0.244865
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.301187
Iter 2/10: OSS cache speed: 0.292515
Iter 2/10: ladvise speed: 0.338203
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.32032
Iter 3/10: OSS cache speed: 0.271073
Iter 3/10: ladvise speed: 0.285525
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.307134
Iter 4/10: OSS cache speed: 0.241193
Iter 4/10: ladvise speed: 0.310872
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.318705
Iter 5/10: OSS cache speed: 0.280697
Iter 5/10: ladvise speed: 0.222424
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.284813
Iter 6/10: OSS cache speed: 0.242307
Iter 6/10: ladvise speed: 0.283999
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.247329
Iter 7/10: OSS cache speed: 0.241269
Iter 7/10: ladvise speed: 0.251417
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.368074
Iter 8/10: OSS cache speed: 0.293859
Iter 8/10: ladvise speed: 0.230305
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.260285
Iter 9/10: OSS cache speed: 0.297632
Iter 9/10: ladvise speed: 0.264632
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.267559
Iter 10/10: OSS cache speed: 0.266561
Iter 10/10: ladvise speed: 0.266312
Average uncached read: .29
Average speedup with OSS cached read:  .26 = +-10%
Average speedup with ladvise willread:  .26 = +-10%
Speedup with OSS cached read less than 20%,  got -10%. Skipping ladvise willread check.
fail_loc=0