== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:00:18 (1710100818)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.05696 s, 34.3 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
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.792203
Iter 1/10: OSS cache speed: 0.217168
Iter 1/10: ladvise speed: 0.179336
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.0262323
Iter 2/10: OSS cache speed: 0.0159266
Iter 2/10: ladvise speed: 0.0553394
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.028999
Iter 3/10: OSS cache speed: 0.0281991
Iter 3/10: ladvise speed: 0.0317981
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.0902174
Iter 4/10: OSS cache speed: 0.0754116
Iter 4/10: ladvise speed: 0.0468157
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.0361816
Iter 5/10: OSS cache speed: 0.0228102
Iter 5/10: ladvise speed: 0.0302824
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.0330261
Iter 6/10: OSS cache speed: 0.0283276
Iter 6/10: ladvise speed: 0.0837529
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.0362053
Iter 7/10: OSS cache speed: 0.0489081
Iter 7/10: ladvise speed: 0.0415695
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.0427264
Iter 8/10: OSS cache speed: 0.0675839
Iter 8/10: ladvise speed: 0.0251016
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.0598554
Iter 9/10: OSS cache speed: 0.16656
Iter 9/10: ladvise speed: 0.101742
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.587309
Iter 10/10: OSS cache speed: 1.38582
Iter 10/10: ladvise speed: 1.91855
Average uncached read: .17
Average speedup with OSS cached read: .20 = +17.64%
Average speedup with ladvise willread: .25 = +47.05%
Speedup with OSS cached read less than 20%, got 17.64%. Skipping ladvise willread check.
fail_loc=0