== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:23:03 (1746141783)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.4039 s, 23.8 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-ffff8800b5d33000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.892109
Iter 1/10: OSS cache speed: 1.02401
Iter 1/10: ladvise speed: 1.05802
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.936963
Iter 2/10: OSS cache speed: 1.06066
Iter 2/10: ladvise speed: 0.998985
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.976037
Iter 3/10: OSS cache speed: 1.11427
Iter 3/10: ladvise speed: 1.09927
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.984204
Iter 4/10: OSS cache speed: 1.05877
Iter 4/10: ladvise speed: 1.01036
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.02253
Iter 5/10: OSS cache speed: 1.00026
Iter 5/10: ladvise speed: 0.859675
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.881044
Iter 6/10: OSS cache speed: 0.980121
Iter 6/10: ladvise speed: 1.13488
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.935421
Iter 7/10: OSS cache speed: 1.13279
Iter 7/10: ladvise speed: 1.06882
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.884329
Iter 8/10: OSS cache speed: 1.16114
Iter 8/10: ladvise speed: 1.32933
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.02805
Iter 9/10: OSS cache speed: 1.01444
Iter 9/10: ladvise speed: 1.1404
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.987031
Iter 10/10: OSS cache speed: 1.02386
Iter 10/10: ladvise speed: 1.09022
Average uncached read: .95
Average speedup with OSS cached read:  1.05 = +10%
Average speedup with ladvise willread:  1.07 = +12%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0