== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:00:44 (1784084444)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.08706 s, 17.2 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-ffff8fff48e10000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.730766
Iter 1/10: OSS cache speed: 0.765027
Iter 1/10: ladvise speed: 0.839041
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.835245
Iter 2/10: OSS cache speed: 1.30407
Iter 2/10: ladvise speed: 1.26761
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.08366
Iter 3/10: OSS cache speed: 0.997028
Iter 3/10: ladvise speed: 1.12488
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.20279
Iter 4/10: OSS cache speed: 1.23572
Iter 4/10: ladvise speed: 1.5561
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.40248
Iter 5/10: OSS cache speed: 1.33086
Iter 5/10: ladvise speed: 1.76674
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.65188
Iter 6/10: OSS cache speed: 1.72597
Iter 6/10: ladvise speed: 1.59755
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.81174
Iter 7/10: OSS cache speed: 1.76361
Iter 7/10: ladvise speed: 1.75943
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.58645
Iter 8/10: OSS cache speed: 1.76172
Iter 8/10: ladvise speed: 2.01893
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.08934
Iter 9/10: OSS cache speed: 1.97371
Iter 9/10: ladvise speed: 1.86878
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.91695
Iter 10/10: OSS cache speed: 2.00053
Iter 10/10: ladvise speed: 2.03699
Average uncached read: 1.43
Average speedup with OSS cached read:  1.48 = +3%
Average speedup with ladvise willread:  1.58 = +10%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0