== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:58:49 (1715453929)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.676314 s, 155 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=4
fail_loc=0x237
Asynchronous ladvise shouldn't wait
fail_loc=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.57615
Iter 1/10: OSS cache speed: 2.9801
Iter 1/10: ladvise speed: 3.03118
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.55127
Iter 2/10: OSS cache speed: 3.04909
Iter 2/10: ladvise speed: 3.08105
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.71585
Iter 3/10: OSS cache speed: 3.07489
Iter 3/10: ladvise speed: 3.05556
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.61488
Iter 4/10: OSS cache speed: 3.0313
Iter 4/10: ladvise speed: 3.04212
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.76591
Iter 5/10: OSS cache speed: 3.05358
Iter 5/10: ladvise speed: 3.05838
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.53199
Iter 6/10: OSS cache speed: 3.01835
Iter 6/10: ladvise speed: 3.05743
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.57256
Iter 7/10: OSS cache speed: 3.16861
Iter 7/10: ladvise speed: 3.10685
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.52186
Iter 8/10: OSS cache speed: 3.10326
Iter 8/10: ladvise speed: 3.01896
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.61338
Iter 9/10: OSS cache speed: 3.11419
Iter 9/10: ladvise speed: 3.16016
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.60808
Iter 10/10: OSS cache speed: 3.10846
Iter 10/10: ladvise speed: 3.10709
Average uncached read: 2.60
Average speedup with OSS cached read:  3.07 = +18.07%
Average speedup with ladvise willread:  3.07 = +18.07%
Speedup with OSS cached read less than 20%,  got 3.07%. Skipping ladvise willread check.