== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:51:46 (1746143506)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 5.72371 s, 18.3 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-ffff880136bd3800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.705145
Iter 1/10: OSS cache speed: 0.920311
Iter 1/10: ladvise speed: 0.938071
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.953518
Iter 2/10: OSS cache speed: 1.07069
Iter 2/10: ladvise speed: 1.15448
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.95892
Iter 3/10: OSS cache speed: 0.918104
Iter 3/10: ladvise speed: 0.890565
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.858546
Iter 4/10: OSS cache speed: 1.06209
Iter 4/10: ladvise speed: 1.06569
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.929578
Iter 5/10: OSS cache speed: 1.03747
Iter 5/10: ladvise speed: 1.25811
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.999356
Iter 6/10: OSS cache speed: 1.18105
Iter 6/10: ladvise speed: 1.14639
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.956364
Iter 7/10: OSS cache speed: 1.00077
Iter 7/10: ladvise speed: 1.0395
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.896402
Iter 8/10: OSS cache speed: 1.06448
Iter 8/10: ladvise speed: 1.12476
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.06746
Iter 9/10: OSS cache speed: 1.07815
Iter 9/10: ladvise speed: 1.2181
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.03332
Iter 10/10: OSS cache speed: 1.10083
Iter 10/10: ladvise speed: 1.0003
Average uncached read: .93
Average speedup with OSS cached read:  1.04 = +11%
Average speedup with ladvise willread:  1.08 = +16%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0