== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:38:02 (1736984282)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.827217 s, 127 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: 3.73065
Iter 1/10: OSS cache speed: 4.0744
Iter 1/10: ladvise speed: 3.79365
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 3.48696
Iter 2/10: OSS cache speed: 4.22131
Iter 2/10: ladvise speed: 2.28977
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.94391
Iter 3/10: OSS cache speed: 2.9184
Iter 3/10: ladvise speed: 3.57279
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.85716
Iter 4/10: OSS cache speed: 2.67906
Iter 4/10: ladvise speed: 2.93407
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.84228
Iter 5/10: OSS cache speed: 3.8584
Iter 5/10: ladvise speed: 2.64002
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.39547
Iter 6/10: OSS cache speed: 1.45648
Iter 6/10: ladvise speed: 1.8192
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.67394
Iter 7/10: OSS cache speed: 1.70752
Iter 7/10: ladvise speed: 1.63872
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.52379
Iter 8/10: OSS cache speed: 2.16924
Iter 8/10: ladvise speed: 2.26792
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.89251
Iter 9/10: OSS cache speed: 2.28916
Iter 9/10: ladvise speed: 2.29281
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.9563
Iter 10/10: OSS cache speed: 2.36948
Iter 10/10: ladvise speed: 2.3813
Average uncached read: 2.43
Average speedup with OSS cached read:  2.77 = +13.99%
Average speedup with ladvise willread:  2.56 = +5.34%
Speedup with OSS cached read less than 20%,  got 2.77%. Skipping ladvise willread check.