== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:07:41 (1743455261)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.34295 s, 44.8 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-ffff8800b63e4800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.10937
Iter 1/10: OSS cache speed: 2.32433
Iter 1/10: ladvise speed: 2.27835
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.31924
Iter 2/10: OSS cache speed: 2.39227
Iter 2/10: ladvise speed: 2.50985
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.90306
Iter 3/10: OSS cache speed: 2.56679
Iter 3/10: ladvise speed: 2.45365
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.37099
Iter 4/10: OSS cache speed: 2.41115
Iter 4/10: ladvise speed: 2.62015
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.69007
Iter 5/10: OSS cache speed: 2.61566
Iter 5/10: ladvise speed: 2.70836
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.7173
Iter 6/10: OSS cache speed: 2.6293
Iter 6/10: ladvise speed: 2.59038
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.4855
Iter 7/10: OSS cache speed: 2.02136
Iter 7/10: ladvise speed: 2.11479
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.99247
Iter 8/10: OSS cache speed: 2.39799
Iter 8/10: ladvise speed: 2.64876
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.68557
Iter 9/10: OSS cache speed: 2.6349
Iter 9/10: ladvise speed: 2.44862
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.04892
Iter 10/10: OSS cache speed: 1.91613
Iter 10/10: ladvise speed: 1.9032
Average uncached read: 2.33
Average speedup with OSS cached read:  2.39 = +2%
Average speedup with ladvise willread:  2.42 = +3%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0