== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:28:32 (1749479312)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.82824 s, 37.1 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-ffff8800aacc3000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.94055
Iter 1/10: OSS cache speed: 3.273
Iter 1/10: ladvise speed: 3.14467
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.97978
Iter 2/10: OSS cache speed: 3.30187
Iter 2/10: ladvise speed: 3.08895
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.85246
Iter 3/10: OSS cache speed: 3.21898
Iter 3/10: ladvise speed: 3.30702
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.97146
Iter 4/10: OSS cache speed: 3.32328
Iter 4/10: ladvise speed: 2.95896
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.79176
Iter 5/10: OSS cache speed: 2.82558
Iter 5/10: ladvise speed: 2.79433
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.67473
Iter 6/10: OSS cache speed: 2.97997
Iter 6/10: ladvise speed: 2.87484
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.90151
Iter 7/10: OSS cache speed: 2.7948
Iter 7/10: ladvise speed: 2.26104
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.72834
Iter 8/10: OSS cache speed: 2.72715
Iter 8/10: ladvise speed: 2.39137
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.8504
Iter 9/10: OSS cache speed: 3.25773
Iter 9/10: ladvise speed: 2.97859
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.93709
Iter 10/10: OSS cache speed: 2.95661
Iter 10/10: ladvise speed: 3.058
Average uncached read: 2.66
Average speedup with OSS cached read:  3.06 = +15%
Average speedup with ladvise willread:  2.88 = +8%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0