== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:58:54 (1715453934)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.633425 s, 166 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: 2.61831
Iter 1/10: OSS cache speed: 2.49229
Iter 1/10: ladvise speed: 2.77985
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.78858
Iter 2/10: OSS cache speed: 2.5932
Iter 2/10: ladvise speed: 2.49008
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.47049
Iter 3/10: OSS cache speed: 2.49784
Iter 3/10: ladvise speed: 2.99851
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.65367
Iter 4/10: OSS cache speed: 2.52481
Iter 4/10: ladvise speed: 2.46935
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.5041
Iter 5/10: OSS cache speed: 2.48847
Iter 5/10: ladvise speed: 2.51807
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.42733
Iter 6/10: OSS cache speed: 2.46801
Iter 6/10: ladvise speed: 2.47123
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.48656
Iter 7/10: OSS cache speed: 2.45337
Iter 7/10: ladvise speed: 2.69472
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.56654
Iter 8/10: OSS cache speed: 2.4442
Iter 8/10: ladvise speed: 2.42919
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.8321
Iter 9/10: OSS cache speed: 2.50389
Iter 9/10: ladvise speed: 2.79423
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.38555
Iter 10/10: OSS cache speed: 2.45752
Iter 10/10: ladvise speed: 2.39335
Average uncached read: 2.57
Average speedup with OSS cached read:  2.49 = +-3.11%
Average speedup with ladvise willread:  2.60 = +1.16%
Speedup with OSS cached read less than 20%,  got 2.49%. Skipping ladvise willread check.