== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:33:38 (1741692818)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.64574 s, 39.6 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-ffff8800b5c9c000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.78609
Iter 1/10: OSS cache speed: 1.86218
Iter 1/10: ladvise speed: 1.75548
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.50058
Iter 2/10: OSS cache speed: 1.96359
Iter 2/10: ladvise speed: 1.80174
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.96561
Iter 3/10: OSS cache speed: 3.00806
Iter 3/10: ladvise speed: 2.6867
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 3.04433
Iter 4/10: OSS cache speed: 2.88075
Iter 4/10: ladvise speed: 3.14321
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.54285
Iter 5/10: OSS cache speed: 2.64863
Iter 5/10: ladvise speed: 2.50162
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.793
Iter 6/10: OSS cache speed: 2.18797
Iter 6/10: ladvise speed: 2.40698
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.01547
Iter 7/10: OSS cache speed: 2.36742
Iter 7/10: ladvise speed: 3.35319
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.58057
Iter 8/10: OSS cache speed: 2.57962
Iter 8/10: ladvise speed: 2.19177
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.01923
Iter 9/10: OSS cache speed: 1.82845
Iter 9/10: ladvise speed: 2.60021
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.57504
Iter 10/10: OSS cache speed: 2.33945
Iter 10/10: ladvise speed: 2.24809
Average uncached read: 2.18
Average speedup with OSS cached read:  2.36 = +8%
Average speedup with ladvise willread:  2.46 = +12%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0