== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:21:20 (1767036080)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.31348 s, 16.6 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-ffff8dd250d2f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.7604
Iter 1/10: OSS cache speed: 1.97743
Iter 1/10: ladvise speed: 1.95212
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.97745
Iter 2/10: OSS cache speed: 1.97402
Iter 2/10: ladvise speed: 1.56818
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.75773
Iter 3/10: OSS cache speed: 1.82978
Iter 3/10: ladvise speed: 2.07336
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.06873
Iter 4/10: OSS cache speed: 2.22557
Iter 4/10: ladvise speed: 2.15049
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.17938
Iter 5/10: OSS cache speed: 2.17069
Iter 5/10: ladvise speed: 2.13056
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.12762
Iter 6/10: OSS cache speed: 2.18089
Iter 6/10: ladvise speed: 2.06845
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.15695
Iter 7/10: OSS cache speed: 2.10948
Iter 7/10: ladvise speed: 2.13148
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.20537
Iter 8/10: OSS cache speed: 2.18367
Iter 8/10: ladvise speed: 2.20339
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.10225
Iter 9/10: OSS cache speed: 2.2311
Iter 9/10: ladvise speed: 2.00336
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.00324
Iter 10/10: OSS cache speed: 2.07579
Iter 10/10: ladvise speed: 1.78304
Average uncached read: 2.03
Average speedup with OSS cached read:  2.09 = +2%
Average speedup with ladvise willread:  2.00 = +-1%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0