== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:12:52 (1735099972)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.03819 s, 34.5 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-ffff8800b63f6800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.660353
Iter 1/10: OSS cache speed: 0.864521
Iter 1/10: ladvise speed: 1.01986
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.899411
Iter 2/10: OSS cache speed: 0.975945
Iter 2/10: ladvise speed: 1.80491
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.92309
Iter 3/10: OSS cache speed: 2.03875
Iter 3/10: ladvise speed: 2.10987
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.34241
Iter 4/10: OSS cache speed: 2.34234
Iter 4/10: ladvise speed: 2.34714
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.26237
Iter 5/10: OSS cache speed: 2.29932
Iter 5/10: ladvise speed: 1.98488
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.57557
Iter 6/10: OSS cache speed: 2.43568
Iter 6/10: ladvise speed: 2.29835
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.3228
Iter 7/10: OSS cache speed: 1.87159
Iter 7/10: ladvise speed: 1.67284
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.75866
Iter 8/10: OSS cache speed: 1.50719
Iter 8/10: ladvise speed: 1.54469
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.26426
Iter 9/10: OSS cache speed: 1.94679
Iter 9/10: ladvise speed: 2.12316
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.14541
Iter 10/10: OSS cache speed: 2.44731
Iter 10/10: ladvise speed: 2.62265
Average uncached read: 1.91
Average speedup with OSS cached read:  1.87 = +-2%
Average speedup with ladvise willread:  1.95 = +2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0