== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:39:28 (1789187968)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.79524 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-ffff8ad11a70b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.692005
Iter 1/10: OSS cache speed: 0.785746
Iter 1/10: ladvise speed: 0.879102
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.930169
Iter 2/10: OSS cache speed: 1.08498
Iter 2/10: ladvise speed: 1.21256
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.03496
Iter 3/10: OSS cache speed: 1.11499
Iter 3/10: ladvise speed: 1.21088
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.42933
Iter 4/10: OSS cache speed: 1.68421
Iter 4/10: ladvise speed: 1.75204
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.73172
Iter 5/10: OSS cache speed: 1.83299
Iter 5/10: ladvise speed: 1.99831
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.17891
Iter 6/10: OSS cache speed: 1.83542
Iter 6/10: ladvise speed: 2.14909
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.36686
Iter 7/10: OSS cache speed: 2.40314
Iter 7/10: ladvise speed: 2.28261
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.23713
Iter 8/10: OSS cache speed: 2.22861
Iter 8/10: ladvise speed: 2.28135
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.21001
Iter 9/10: OSS cache speed: 2.39397
Iter 9/10: ladvise speed: 2.29901
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.38364
Iter 10/10: OSS cache speed: 2.41247
Iter 10/10: ladvise speed: 2.45408
Average uncached read: 1.71
Average speedup with OSS cached read:  1.77 = +3%
Average speedup with ladvise willread:  1.85 = +8%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0