== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:27:04 (1736983624)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.570418 s, 184 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: 4.34961
Iter 1/10: OSS cache speed: 5.13818
Iter 1/10: ladvise speed: 4.78069
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 4.89946
Iter 2/10: OSS cache speed: 4.85778
Iter 2/10: ladvise speed: 4.5221
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 4.74586
Iter 3/10: OSS cache speed: 4.69746
Iter 3/10: ladvise speed: 4.93658
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 4.83427
Iter 4/10: OSS cache speed: 4.88162
Iter 4/10: ladvise speed: 4.99862
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 4.89256
Iter 5/10: OSS cache speed: 5.03236
Iter 5/10: ladvise speed: 4.86906
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 4.79828
Iter 6/10: OSS cache speed: 4.71358
Iter 6/10: ladvise speed: 4.84195
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 4.73088
Iter 7/10: OSS cache speed: 4.82611
Iter 7/10: ladvise speed: 4.70344
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 4.81629
Iter 8/10: OSS cache speed: 4.55019
Iter 8/10: ladvise speed: 4.60695
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 5.08545
Iter 9/10: OSS cache speed: 4.69961
Iter 9/10: ladvise speed: 4.72622
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 4.78886
Iter 10/10: OSS cache speed: 4.69668
Iter 10/10: ladvise speed: 4.89632
Average uncached read: 4.79
Average speedup with OSS cached read:  4.80 = +.20%
Average speedup with ladvise willread:  4.78 = +-.20%
Speedup with OSS cached read less than 20%,  got 4.80%. Skipping ladvise willread check.