== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:29:46 (1782631786)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.06748 s, 17.3 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-ffff8c299882a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.05883
Iter 1/10: OSS cache speed: 1.87099
Iter 1/10: ladvise speed: 2.03433
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.9854
Iter 2/10: OSS cache speed: 1.87499
Iter 2/10: ladvise speed: 2.07447
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.98059
Iter 3/10: OSS cache speed: 1.77295
Iter 3/10: ladvise speed: 1.59041
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.91485
Iter 4/10: OSS cache speed: 1.18657
Iter 4/10: ladvise speed: 1.868
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.76864
Iter 5/10: OSS cache speed: 1.9295
Iter 5/10: ladvise speed: 1.7622
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.92547
Iter 6/10: OSS cache speed: 2.0617
Iter 6/10: ladvise speed: 1.95564
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.22496
Iter 7/10: OSS cache speed: 2.19968
Iter 7/10: ladvise speed: 2.19634
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.7862
Iter 8/10: OSS cache speed: 1.19652
Iter 8/10: ladvise speed: 1.08829
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.07316
Iter 9/10: OSS cache speed: 1.14361
Iter 9/10: ladvise speed: 1.92271
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.60887
Iter 10/10: OSS cache speed: 1.32125
Iter 10/10: ladvise speed: 1.09763
Average uncached read: 1.83
Average speedup with OSS cached read:  1.65 = +-9%
Average speedup with ladvise willread:  1.75 = +-4%
Speedup with OSS cached read less than 20%,  got -9%. Skipping ladvise willread check.
fail_loc=0