== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 19:41:34 (1773618094)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.18881 s, 14.6 MB/s
llite.lustre-ffff98f474ca1000.read_ahead_stats=clear
llite.lustre-ffff98f474ca1000.read_ahead_stats=
snapshot_time             1773618114.925109698 secs.nsecs
start_time                1773618104.217332309 secs.nsecs
elapsed_time              10.707777389 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          9 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=226592: Sun Mar 15 19:50:01 2026
  read: IOPS=10, BW=10.6MiB/s (11.1MB/s)(5120MiB/482884msec)
    clat (msec): min=57, max=338, avg=94.07, stdev=30.46
     lat (msec): min=57, max=338, avg=94.08, stdev=30.46
    clat percentiles (msec):
     |  1.00th=[   64],  5.00th=[   69], 10.00th=[   71], 20.00th=[   74],
     | 30.00th=[   77], 40.00th=[   80], 50.00th=[   83], 60.00th=[   87],
     | 70.00th=[   94], 80.00th=[  107], 90.00th=[  146], 95.00th=[  165],
     | 99.00th=[  197], 99.50th=[  211], 99.90th=[  251], 99.95th=[  266],
     | 99.99th=[  338]
   bw (  KiB/s): min= 2035, max=16384, per=100.00%, avg=10894.64, stdev=2867.72, samples=960
   iops        : min=    1, max=   16, avg=10.23, stdev= 2.86, samples=960
  lat (msec)   : 100=76.33%, 250=23.55%, 500=0.12%
  cpu          : usr=0.57%, sys=70.39%, ctx=16273, majf=5303, minf=1305685
  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=10.6MiB/s (11.1MB/s), 10.6MiB/s-10.6MiB/s (11.1MB/s-11.1MB/s), io=5120MiB (5369MB), run=482884-482884msec