== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:25:48 (1744129548)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.78545 s, 37.6 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-ffff88012bd9e000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.68578
Iter 1/10: OSS cache speed: 3.39553
Iter 1/10: ladvise speed: 3.14633
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.62826
Iter 2/10: OSS cache speed: 3.00282
Iter 2/10: ladvise speed: 3.02001
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.83083
Iter 3/10: OSS cache speed: 3.24029
Iter 3/10: ladvise speed: 3.10958
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.98146
Iter 4/10: OSS cache speed: 3.31364
Iter 4/10: ladvise speed: 3.41953
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 3.12947
Iter 5/10: OSS cache speed: 3.44156
Iter 5/10: ladvise speed: 3.44321
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 3.00432
Iter 6/10: OSS cache speed: 2.52961
Iter 6/10: ladvise speed: 2.51301
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.52968
Iter 7/10: OSS cache speed: 2.89644
Iter 7/10: ladvise speed: 3.21936
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.97695
Iter 8/10: OSS cache speed: 3.24231
Iter 8/10: ladvise speed: 3.25588
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.52063
Iter 9/10: OSS cache speed: 3.02875
Iter 9/10: ladvise speed: 3.19259
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.91057
Iter 10/10: OSS cache speed: 3.06551
Iter 10/10: ladvise speed: 1.72767
Average uncached read: 2.81
Average speedup with OSS cached read:  3.11 = +10%
Average speedup with ladvise willread:  3.00 = +6%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0