== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:04:11 (1746792251)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.47256 s, 42.4 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-ffff8800b62aa800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.49343
Iter 1/10: OSS cache speed: 3.13964
Iter 1/10: ladvise speed: 2.44542
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.44673
Iter 2/10: OSS cache speed: 3.3793
Iter 2/10: ladvise speed: 3.07099
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.50223
Iter 3/10: OSS cache speed: 2.96339
Iter 3/10: ladvise speed: 2.89029
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.08811
Iter 4/10: OSS cache speed: 2.45246
Iter 4/10: ladvise speed: 2.8783
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.38168
Iter 5/10: OSS cache speed: 3.05175
Iter 5/10: ladvise speed: 1.71291
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.53086
Iter 6/10: OSS cache speed: 1.66608
Iter 6/10: ladvise speed: 1.70019
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.37916
Iter 7/10: OSS cache speed: 1.77714
Iter 7/10: ladvise speed: 1.87143
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.79802
Iter 8/10: OSS cache speed: 1.88374
Iter 8/10: ladvise speed: 1.71628
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.36514
Iter 9/10: OSS cache speed: 1.87414
Iter 9/10: ladvise speed: 1.90924
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.55168
Iter 10/10: OSS cache speed: 1.75023
Iter 10/10: ladvise speed: 1.52605
Average uncached read: 1.95
Average speedup with OSS cached read:  2.39 = +22%
Average speedup with ladvise willread:  2.17 = +11%
fail_loc=0