Update PIM_README.md

Author: Yinan

PIM_README.md

@@ -15,7 +15,30 @@ make LLAMA_PIM=1
 Prepare your model files as the original README.md shows. A 4-bit-quantified model in gguf format is prefered.
 
 ```
-./llama-cli -m /mnt/LLM-models/chinese-alpaca-2-7b/gguf/chinese-alpaca-7b_q4_0.gguf  --temp 0 -t 1 --no-warmup -p "列举5个北京经典美食。只列举名字，不要介绍。"
+./llama-cli -m /mnt/LLM-models/chinese-alpaca-2-7b/gguf/chinese-alpaca-7b_q4_0.gguf \
+--temp 0 -t 1 --no-warmup -p "列举5个北京经典美食。只列举名字，不要介绍。"
+```
+
+Which may output:
+```shell
+...
+sampler seed: 4294967295
+sampler params:
+        repeat_last_n = 64, repeat_penalty = 1.000, frequency_penalty = 0.000, presence_penalty = 0.000
+        top_k = 40, tfs_z = 1.000, top_p = 0.950, min_p = 0.050, typical_p = 1.000, temp = 0.000
+        mirostat = 0, mirostat_lr = 0.100, mirostat_ent = 5.000
+sampler chain: logits -> logit-bias -> penalties -> greedy
+generate: n_ctx = 4096, n_batch = 2048, n_predict = -1, n_keep = 1
+
+ 列举5个北京经典美食。只列举名字，不要介绍。1. 烤鸭 2. 炸酱面 3. 豆汁 4. 羊蝎子 5. 驴打滚 [end of text]
+
+
+llama_perf_sampler_print:    sampling time =       1.02 ms /    49 runs   (    0.02 ms per token, 47804.88 tokens per second)
+llama_perf_context_print:        load time =    4097.04 ms
+llama_perf_context_print: prompt eval time =    2966.36 ms /    16 tokens (  185.40 ms per token,     5.39 tokens per second)
+llama_perf_context_print:        eval time =   12105.60 ms /    32 runs   (  378.30 ms per token,     2.64 tokens per second)
+llama_perf_context_print:       total time =   16206.10 ms /    48 tokens
+
 ```
 
 ## 3. llama-ts for tensor test
@@ -40,8 +63,8 @@ There are several macros defined in `include/llama.h` that controls the bahavior
 
 ```c++
 #ifdef PIM_KERNEL
-#define NR_DPUS 64
-#define NR_LAYER 2
+#define NR_DPUS 64    //Number of DPUs to execute the kernel
+#define NR_LAYER 2    //Number of transformer layers to offload
 #define DPU_BINARY "./dpu/gemv_dpu"
 ...
 #endif // PIM_KERNEL
@@ -53,4 +76,4 @@ The PIM binary `dpu/gemv_dpu` is built from `dpu/dpu_main.c` by typing:
 cd dpu
 ./pim_build.sh
 ```
-So check `dpu/dpu_main.c` to find out how the kernel is implemented.
+Check `dpu/dpu_main.c` to find out how the kernel is implemented.