== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:21:53 (1777422113)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.70777 s, 18.4 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
llite.lustre-ffff9a6c45240800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.56787
Iter 1/10: OSS cache speed: 1.78135
Iter 1/10: ladvise speed: 1.55972
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.65387
Iter 2/10: OSS cache speed: 1.50083
Iter 2/10: ladvise speed: 1.71627
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.86925
Iter 3/10: OSS cache speed: 1.8881
Iter 3/10: ladvise speed: 1.78981
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.8065
Iter 4/10: OSS cache speed: 1.9928
Iter 4/10: ladvise speed: 1.91994
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.96616
Iter 5/10: OSS cache speed: 2.06798
Iter 5/10: ladvise speed: 2.05267
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.88088
Iter 6/10: OSS cache speed: 0.727297
Iter 6/10: ladvise speed: 0.525194
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.586625
Iter 7/10: OSS cache speed: 0.588622
Iter 7/10: ladvise speed: 0.532365
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.548155
Iter 8/10: OSS cache speed: 0.540638
Iter 8/10: ladvise speed: 0.50014
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.484281
Iter 9/10: OSS cache speed: 0.54085
Iter 9/10: ladvise speed: 0.614637
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.631474
Iter 10/10: OSS cache speed: 0.641973
Iter 10/10: ladvise speed: 0.664146
Average uncached read: 1.29
Average speedup with OSS cached read:  1.22 = +-5%
Average speedup with ladvise willread:  1.18 = +-8%
Speedup with OSS cached read less than 20%,  got -5%. Skipping ladvise willread check.
fail_loc=0