== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:14:13 (1786115653)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.79422 s, 15.4 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-ffff91f10584b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.03843
Iter 1/10: OSS cache speed: 1.50365
Iter 1/10: ladvise speed: 1.81817
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.78453
Iter 2/10: OSS cache speed: 1.93532
Iter 2/10: ladvise speed: 1.75534
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.79088
Iter 3/10: OSS cache speed: 2.00016
Iter 3/10: ladvise speed: 2.21424
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.18783
Iter 4/10: OSS cache speed: 2.13852
Iter 4/10: ladvise speed: 2.63613
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.15714
Iter 5/10: OSS cache speed: 2.50033
Iter 5/10: ladvise speed: 2.68745
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.51052
Iter 6/10: OSS cache speed: 2.36073
Iter 6/10: ladvise speed: 2.50694
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.28137
Iter 7/10: OSS cache speed: 2.56267
Iter 7/10: ladvise speed: 2.6528
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.42041
Iter 8/10: OSS cache speed: 2.35391
Iter 8/10: ladvise speed: 2.35575
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.20054
Iter 9/10: OSS cache speed: 2.2762
Iter 9/10: ladvise speed: 2.28838
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.26224
Iter 10/10: OSS cache speed: 2.21849
Iter 10/10: ladvise speed: 2.40246
Average uncached read: 2.06
Average speedup with OSS cached read:  2.18 = +5%
Average speedup with ladvise willread:  2.33 = +13%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0