== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 20:45:55 (1763343955)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.3767 s, 7.8 MB/s
llite.lustre-ffff9041058df800.read_ahead_stats=clear
llite.lustre-ffff9041058df800.read_ahead_stats=
snapshot_time             1763343994.320945008 secs.nsecs
start_time                1763343975.054771284 secs.nsecs
elapsed_time              19.266173724 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          128 samples [pages]
failed_to_reach_end       1 samples [pages]
failed_to_fast_read       230 samples [pages]
mmap_range_read           225 samples [pages]
readahead_pages           225 samples [pages] 8 128 25370
/usr/bin/fio
thp                     : Memory Advise Huge Page
read_test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=mmap, iodepth=1
fio-3.19
Starting 1 process

read_test: (groupid=0, jobs=1): err= 0: pid=225754: Sun Nov 16 20:58:12 2025
  read: IOPS=7, BW=7584KiB/s (7766kB/s)(5120MiB/691342msec)
    clat (msec): min=17, max=372, avg=134.53, stdev=41.72
     lat (msec): min=17, max=372, avg=134.53, stdev=41.72
    clat percentiles (msec):
     |  1.00th=[   71],  5.00th=[   83], 10.00th=[   89], 20.00th=[   99],
     | 30.00th=[  108], 40.00th=[  117], 50.00th=[  128], 60.00th=[  140],
     | 70.00th=[  150], 80.00th=[  167], 90.00th=[  192], 95.00th=[  213],
     | 99.00th=[  259], 99.50th=[  275], 99.90th=[  317], 99.95th=[  321],
     | 99.99th=[  372]
   bw (  KiB/s): min= 2007, max=16286, per=100.00%, avg=7618.37, stdev=2050.49, samples=1365
   iops        : min=    1, max=   15, avg= 6.79, stdev= 2.08, samples=1365
  lat (msec)   : 20=0.02%, 50=0.21%, 100=21.76%, 250=76.58%, 500=1.43%
  cpu          : usr=0.41%, sys=33.59%, ctx=25395, majf=7809, minf=1303179
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=5120,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=7584KiB/s (7766kB/s), 7584KiB/s-7584KiB/s (7766kB/s-7766kB/s), io=5120MiB (5369MB), run=691342-691342msec