forked from Minki/linux
ffc197763e
The gvt:gvt_command trace involve unnecessary overhead even this trace is
not enabled. We need improve it.
The kernel trace infrastructure provide a full api to define a trace event.
We should leverage them if possible. And one important thing is that a trace
point should store raw data but not format string.
This patch include two part work:
1) Refactor the gvt_command trace definition, including:
o only store raw trace data.
o use __dynamic_array() to declare a variable size buffer.
o use __print_array() to format raw cmd data.
o rename vm_id as vgpu_id.
2) Improve the trace invoking, including:
o remove the cycles calculation for handler. We can get this data
by any perf tool.
o do not make a backup for raw cmd data which just doesn't make sense.
With this patch, this trace has no overhead if it is not enabled. And we are
trace style now.
The final output example:
gvt workload 0-211 [000] ...1 120.555964: gvt_command: vgpu1 ring 0: buf_type 0, ip_gma e161e880, raw cmd {0x4000000}
gvt workload 0-211 [000] ...1 120.556014: gvt_command: vgpu1 ring 0: buf_type 0, ip_gma e161e884, raw cmd {0x7a000004,0x1004000,0xe1511018,0x0,0x7d,0x0}
gvt workload 0-211 [000] ...1 120.556062: gvt_command: vgpu1 ring 0: buf_type 0, ip_gma e161e89c, raw cmd {0x7a000004,0x140000,0x0,0x0,0x0,0x0}
gvt workload 0-211 [000] ...1 120.556110: gvt_command: vgpu1 ring 0: buf_type 0, ip_gma e161e8b4, raw cmd {0x10400002,0xe1511018,0x0,0x7d}
Signed-off-by: Changbin Du <changbin.du@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
267 lines
6.1 KiB
C
267 lines
6.1 KiB
C
/*
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* Copyright © 2011-2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Jike Song <jike.song@intel.com>
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*
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* Contributors:
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* Zhi Wang <zhi.a.wang@intel.com>
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*
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*/
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#if !defined(_GVT_TRACE_H_) || defined(TRACE_HEADER_MULTI_READ)
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#define _GVT_TRACE_H_
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#include <linux/types.h>
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#include <linux/stringify.h>
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#include <linux/tracepoint.h>
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#include <asm/tsc.h>
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM gvt
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TRACE_EVENT(spt_alloc,
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TP_PROTO(int id, void *spt, int type, unsigned long mfn,
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unsigned long gpt_gfn),
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TP_ARGS(id, spt, type, mfn, gpt_gfn),
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TP_STRUCT__entry(
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__field(int, id)
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__field(void *, spt)
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__field(int, type)
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__field(unsigned long, mfn)
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__field(unsigned long, gpt_gfn)
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),
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TP_fast_assign(
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__entry->id = id;
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__entry->spt = spt;
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__entry->type = type;
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__entry->mfn = mfn;
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__entry->gpt_gfn = gpt_gfn;
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),
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TP_printk("VM%d [alloc] spt %p type %d mfn 0x%lx gfn 0x%lx\n",
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__entry->id,
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__entry->spt,
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__entry->type,
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__entry->mfn,
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__entry->gpt_gfn)
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);
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TRACE_EVENT(spt_free,
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TP_PROTO(int id, void *spt, int type),
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TP_ARGS(id, spt, type),
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TP_STRUCT__entry(
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__field(int, id)
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__field(void *, spt)
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__field(int, type)
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),
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TP_fast_assign(
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__entry->id = id;
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__entry->spt = spt;
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__entry->type = type;
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),
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TP_printk("VM%u [free] spt %p type %d\n",
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__entry->id,
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__entry->spt,
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__entry->type)
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);
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#define MAX_BUF_LEN 256
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TRACE_EVENT(gma_index,
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TP_PROTO(const char *prefix, unsigned long gma,
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unsigned long index),
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TP_ARGS(prefix, gma, index),
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TP_STRUCT__entry(
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__array(char, buf, MAX_BUF_LEN)
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),
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TP_fast_assign(
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snprintf(__entry->buf, MAX_BUF_LEN,
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"%s gma 0x%lx index 0x%lx\n", prefix, gma, index);
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),
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TP_printk("%s", __entry->buf)
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);
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TRACE_EVENT(gma_translate,
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TP_PROTO(int id, char *type, int ring_id, int pt_level,
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unsigned long gma, unsigned long gpa),
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TP_ARGS(id, type, ring_id, pt_level, gma, gpa),
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TP_STRUCT__entry(
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__array(char, buf, MAX_BUF_LEN)
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),
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TP_fast_assign(
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snprintf(__entry->buf, MAX_BUF_LEN,
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"VM%d %s ring %d pt_level %d gma 0x%lx -> gpa 0x%lx\n",
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id, type, ring_id, pt_level, gma, gpa);
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),
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TP_printk("%s", __entry->buf)
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);
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TRACE_EVENT(spt_refcount,
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TP_PROTO(int id, char *action, void *spt, int before, int after),
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TP_ARGS(id, action, spt, before, after),
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TP_STRUCT__entry(
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__array(char, buf, MAX_BUF_LEN)
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),
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TP_fast_assign(
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snprintf(__entry->buf, MAX_BUF_LEN,
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"VM%d [%s] spt %p before %d -> after %d\n",
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id, action, spt, before, after);
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),
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TP_printk("%s", __entry->buf)
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);
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TRACE_EVENT(spt_change,
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TP_PROTO(int id, char *action, void *spt, unsigned long gfn,
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int type),
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TP_ARGS(id, action, spt, gfn, type),
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TP_STRUCT__entry(
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__array(char, buf, MAX_BUF_LEN)
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),
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TP_fast_assign(
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snprintf(__entry->buf, MAX_BUF_LEN,
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"VM%d [%s] spt %p gfn 0x%lx type %d\n",
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id, action, spt, gfn, type);
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),
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TP_printk("%s", __entry->buf)
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);
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TRACE_EVENT(gpt_change,
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TP_PROTO(int id, const char *tag, void *spt, int type, u64 v,
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unsigned long index),
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TP_ARGS(id, tag, spt, type, v, index),
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TP_STRUCT__entry(
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__array(char, buf, MAX_BUF_LEN)
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),
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TP_fast_assign(
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snprintf(__entry->buf, MAX_BUF_LEN,
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"VM%d [%s] spt %p type %d entry 0x%llx index 0x%lx\n",
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id, tag, spt, type, v, index);
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),
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TP_printk("%s", __entry->buf)
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);
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TRACE_EVENT(oos_change,
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TP_PROTO(int id, const char *tag, int page_id, void *gpt, int type),
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TP_ARGS(id, tag, page_id, gpt, type),
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TP_STRUCT__entry(
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__array(char, buf, MAX_BUF_LEN)
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),
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TP_fast_assign(
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snprintf(__entry->buf, MAX_BUF_LEN,
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"VM%d [oos %s] page id %d gpt %p type %d\n",
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id, tag, page_id, gpt, type);
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),
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TP_printk("%s", __entry->buf)
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);
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TRACE_EVENT(oos_sync,
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TP_PROTO(int id, int page_id, void *gpt, int type, u64 v,
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unsigned long index),
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TP_ARGS(id, page_id, gpt, type, v, index),
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TP_STRUCT__entry(
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__array(char, buf, MAX_BUF_LEN)
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),
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TP_fast_assign(
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snprintf(__entry->buf, MAX_BUF_LEN,
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"VM%d [oos sync] page id %d gpt %p type %d entry 0x%llx index 0x%lx\n",
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id, page_id, gpt, type, v, index);
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),
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TP_printk("%s", __entry->buf)
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);
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TRACE_EVENT(gvt_command,
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TP_PROTO(u8 vgpu_id, u8 ring_id, u32 ip_gma, u32 *cmd_va, u32 cmd_len,
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u32 buf_type),
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TP_ARGS(vgpu_id, ring_id, ip_gma, cmd_va, cmd_len, buf_type),
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TP_STRUCT__entry(
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__field(u8, vgpu_id)
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__field(u8, ring_id)
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__field(u32, ip_gma)
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__field(u32, buf_type)
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__field(u32, cmd_len)
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__dynamic_array(u32, raw_cmd, cmd_len)
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),
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TP_fast_assign(
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__entry->vgpu_id = vgpu_id;
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__entry->ring_id = ring_id;
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__entry->ip_gma = ip_gma;
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__entry->buf_type = buf_type;
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__entry->cmd_len = cmd_len;
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memcpy(__get_dynamic_array(raw_cmd), cmd_va, cmd_len * sizeof(*cmd_va));
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),
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TP_printk("vgpu%d ring %d: buf_type %u, ip_gma %08x, raw cmd %s",
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__entry->vgpu_id,
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__entry->ring_id,
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__entry->buf_type,
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__entry->ip_gma,
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__print_array(__get_dynamic_array(raw_cmd), __entry->cmd_len, 4))
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);
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#endif /* _GVT_TRACE_H_ */
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/* This part must be out of protection */
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#undef TRACE_INCLUDE_PATH
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#define TRACE_INCLUDE_PATH .
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_FILE trace
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#include <trace/define_trace.h>
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