== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:50:08 (1724763008)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.01765 s, 34.7 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-ffff8800b60f3000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.02959
Iter 1/10: OSS cache speed: 2.4792
Iter 1/10: ladvise speed: 2.58698
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.23407
Iter 2/10: OSS cache speed: 2.64722
Iter 2/10: ladvise speed: 2.68459
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.63772
Iter 3/10: OSS cache speed: 2.49129
Iter 3/10: ladvise speed: 2.37575
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.12026
Iter 4/10: OSS cache speed: 2.30815
Iter 4/10: ladvise speed: 2.50227
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.21555
Iter 5/10: OSS cache speed: 3.03011
Iter 5/10: ladvise speed: 3.2423
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.76652
Iter 6/10: OSS cache speed: 3.08459
Iter 6/10: ladvise speed: 2.94798
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.50229
Iter 7/10: OSS cache speed: 2.72418
Iter 7/10: ladvise speed: 2.81834
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.59578
Iter 8/10: OSS cache speed: 1.97232
Iter 8/10: ladvise speed: 2.50505
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.02957
Iter 9/10: OSS cache speed: 2.23277
Iter 9/10: ladvise speed: 2.5852
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.34448
Iter 10/10: OSS cache speed: 2.99989
Iter 10/10: ladvise speed: 2.88736
Average uncached read: 2.34
Average speedup with OSS cached read: 2.59 = +10.68%
Average speedup with ladvise willread: 2.71 = +15.81%
Speedup with OSS cached read less than 20%, got 10.68%. Skipping ladvise willread check.
fail_loc=0