== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:07:01 (1743455221)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.52588 s, 41.5 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-ffff88012a608000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.05338
Iter 1/10: OSS cache speed: 2.05646
Iter 1/10: ladvise speed: 2.13658
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.22643
Iter 2/10: OSS cache speed: 2.90849
Iter 2/10: ladvise speed: 3.13391
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.63763
Iter 3/10: OSS cache speed: 3.1729
Iter 3/10: ladvise speed: 3.25868
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.97235
Iter 4/10: OSS cache speed: 3.2987
Iter 4/10: ladvise speed: 3.28598
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.95077
Iter 5/10: OSS cache speed: 3.22332
Iter 5/10: ladvise speed: 3.20226
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.71734
Iter 6/10: OSS cache speed: 2.80388
Iter 6/10: ladvise speed: 2.43499
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.48391
Iter 7/10: OSS cache speed: 2.90695
Iter 7/10: ladvise speed: 2.63538
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.02502
Iter 8/10: OSS cache speed: 2.54895
Iter 8/10: ladvise speed: 2.29724
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.00857
Iter 9/10: OSS cache speed: 2.22733
Iter 9/10: ladvise speed: 2.8599
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.09055
Iter 10/10: OSS cache speed: 2.41625
Iter 10/10: ladvise speed: 2.11101
Average uncached read: 2.41
Average speedup with OSS cached read:  2.75 = +14%
Average speedup with ladvise willread:  2.73 = +13%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0