== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:36:48 (1784126208)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.30721 s, 16.6 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-ffff9f170392c000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.953657
Iter 1/10: OSS cache speed: 1.17341
Iter 1/10: ladvise speed: 1.23564
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.09562
Iter 2/10: OSS cache speed: 1.3814
Iter 2/10: ladvise speed: 1.66711
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.64145
Iter 3/10: OSS cache speed: 1.51998
Iter 3/10: ladvise speed: 1.88358
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.80726
Iter 4/10: OSS cache speed: 1.7357
Iter 4/10: ladvise speed: 1.72321
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.38895
Iter 5/10: OSS cache speed: 1.68054
Iter 5/10: ladvise speed: 1.6244
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.79001
Iter 6/10: OSS cache speed: 1.94293
Iter 6/10: ladvise speed: 1.94498
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.8168
Iter 7/10: OSS cache speed: 1.8642
Iter 7/10: ladvise speed: 1.85677
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.91753
Iter 8/10: OSS cache speed: 1.85302
Iter 8/10: ladvise speed: 1.88697
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.91999
Iter 9/10: OSS cache speed: 2.05752
Iter 9/10: ladvise speed: 2.07579
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.04287
Iter 10/10: OSS cache speed: 2.1349
Iter 10/10: ladvise speed: 0.662071
Average uncached read: 1.63
Average speedup with OSS cached read:  1.73 = +6%
Average speedup with ladvise willread:  1.65 = +1%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0