== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:40:26 (1730803226)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.66927 s, 39.3 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-ffff8800b63e1000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.22578
Iter 1/10: OSS cache speed: 2.28961
Iter 1/10: ladvise speed: 2.18978
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.98286
Iter 2/10: OSS cache speed: 2.22415
Iter 2/10: ladvise speed: 2.37954
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.38922
Iter 3/10: OSS cache speed: 2.48195
Iter 3/10: ladvise speed: 2.47428
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.55678
Iter 4/10: OSS cache speed: 2.86132
Iter 4/10: ladvise speed: 2.6285
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.58039
Iter 5/10: OSS cache speed: 2.70312
Iter 5/10: ladvise speed: 2.55569
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.65278
Iter 6/10: OSS cache speed: 2.57074
Iter 6/10: ladvise speed: 2.63016
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.80697
Iter 7/10: OSS cache speed: 2.47437
Iter 7/10: ladvise speed: 2.55002
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.50549
Iter 8/10: OSS cache speed: 2.74217
Iter 8/10: ladvise speed: 2.67224
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.5679
Iter 9/10: OSS cache speed: 2.62633
Iter 9/10: ladvise speed: 2.66773
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.70184
Iter 10/10: OSS cache speed: 2.76076
Iter 10/10: ladvise speed: 2.67665
Average uncached read: 2.49
Average speedup with OSS cached read: 2.57 = +3.21%
Average speedup with ladvise willread: 2.54 = +2.00%
Speedup with OSS cached read less than 20%, got 3.21%. Skipping ladvise willread check.
fail_loc=0