== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:57:52 (1787381872)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.7221 s, 8.9 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-ffff8ee44500d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.299842
Iter 1/10: OSS cache speed: 0.331372
Iter 1/10: ladvise speed: 0.313038
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.344401
Iter 2/10: OSS cache speed: 0.309579
Iter 2/10: ladvise speed: 0.337255
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.3619
Iter 3/10: OSS cache speed: 0.365092
Iter 3/10: ladvise speed: 0.347729
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.364468
Iter 4/10: OSS cache speed: 0.346695
Iter 4/10: ladvise speed: 0.368329
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.370276
Iter 5/10: OSS cache speed: 0.323635
Iter 5/10: ladvise speed: 0.362697
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.366268
Iter 6/10: OSS cache speed: 0.355148
Iter 6/10: ladvise speed: 0.350607
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.344757
Iter 7/10: OSS cache speed: 0.345032
Iter 7/10: ladvise speed: 0.304587
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.351443
Iter 8/10: OSS cache speed: 0.336316
Iter 8/10: ladvise speed: 0.315862
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.342824
Iter 9/10: OSS cache speed: 0.327789
Iter 9/10: ladvise speed: 0.321784
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.31039
Iter 10/10: OSS cache speed: 0.351755
Iter 10/10: ladvise speed: 0.302305
Average uncached read: .34
Average speedup with OSS cached read:  .33 = +-2%
Average speedup with ladvise willread:  .33 = +-2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0