== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:06:28 (1777565188)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.37993 s, 19.5 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-ffff9066c4964800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.06048
Iter 1/10: OSS cache speed: 2.12422
Iter 1/10: ladvise speed: 2.07504
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.99829
Iter 2/10: OSS cache speed: 2.08525
Iter 2/10: ladvise speed: 2.1508
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.12022
Iter 3/10: OSS cache speed: 2.06807
Iter 3/10: ladvise speed: 2.13573
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.1567
Iter 4/10: OSS cache speed: 2.29007
Iter 4/10: ladvise speed: 2.36992
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.15981
Iter 5/10: OSS cache speed: 2.10868
Iter 5/10: ladvise speed: 2.01452
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.12641
Iter 6/10: OSS cache speed: 2.1137
Iter 6/10: ladvise speed: 2.06863
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.06834
Iter 7/10: OSS cache speed: 2.03119
Iter 7/10: ladvise speed: 2.16706
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.17108
Iter 8/10: OSS cache speed: 2.16182
Iter 8/10: ladvise speed: 1.27494
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.41914
Iter 9/10: OSS cache speed: 1.5739
Iter 9/10: ladvise speed: 1.72839
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.830473
Iter 10/10: OSS cache speed: 1.4644
Iter 10/10: ladvise speed: 1.81514
Average uncached read: 1.91
Average speedup with OSS cached read:  2.00 = +4%
Average speedup with ladvise willread:  1.98 = +3%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0