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[Qemu-devel] [PULL 13/14] ui: add trace events related to VNC client thr
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [PULL 13/14] ui: add trace events related to VNC client throttling |
Date: |
Fri, 12 Jan 2018 13:58:53 +0100 |
From: "Daniel P. Berrange" <address@hidden>
The VNC client throttling is quite subtle so will benefit from having trace
points available for live debugging.
Signed-off-by: Daniel P. Berrange <address@hidden>
Reviewed-by: Darren Kenny <address@hidden>
Reviewed-by: Marc-André Lureau <address@hidden>
Message-id: address@hidden
Signed-off-by: Gerd Hoffmann <address@hidden>
---
ui/vnc.c | 23 +++++++++++++++++++++++
ui/trace-events | 7 +++++++
2 files changed, 30 insertions(+)
diff --git a/ui/vnc.c b/ui/vnc.c
index e53e84587a..0a5e629d5d 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -1011,6 +1011,12 @@ static void vnc_update_throttle_offset(VncState *vs)
*/
offset = MAX(offset, 1024 * 1024);
+ if (vs->throttle_output_offset != offset) {
+ trace_vnc_client_throttle_threshold(
+ vs, vs->ioc, vs->throttle_output_offset, offset, vs->client_width,
+ vs->client_height, vs->client_pf.bytes_per_pixel, vs->audio_cap);
+ }
+
vs->throttle_output_offset = offset;
}
@@ -1028,6 +1034,8 @@ static bool vnc_should_update(VncState *vs)
vs->job_update == VNC_STATE_UPDATE_NONE) {
return true;
}
+ trace_vnc_client_throttle_incremental(
+ vs, vs->ioc, vs->job_update, vs->output.offset);
break;
case VNC_STATE_UPDATE_FORCE:
/* Only allow forced updates if the pending send queue
@@ -1042,6 +1050,8 @@ static bool vnc_should_update(VncState *vs)
vs->job_update == VNC_STATE_UPDATE_NONE) {
return true;
}
+ trace_vnc_client_throttle_forced(
+ vs, vs->ioc, vs->job_update, vs->force_update_offset);
break;
}
return false;
@@ -1158,6 +1168,8 @@ static void audio_capture(void *opaque, void *buf, int
size)
vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_DATA);
vnc_write_u32(vs, size);
vnc_write(vs, buf, size);
+ } else {
+ trace_vnc_client_throttle_audio(vs, vs->ioc, vs->output.offset);
}
vnc_unlock_output(vs);
vnc_flush(vs);
@@ -1328,6 +1340,7 @@ ssize_t vnc_client_write_buf(VncState *vs, const uint8_t
*data, size_t datalen)
*/
static ssize_t vnc_client_write_plain(VncState *vs)
{
+ size_t offset;
ssize_t ret;
#ifdef CONFIG_VNC_SASL
@@ -1348,11 +1361,19 @@ static ssize_t vnc_client_write_plain(VncState *vs)
return 0;
if (ret >= vs->force_update_offset) {
+ if (vs->force_update_offset != 0) {
+ trace_vnc_client_unthrottle_forced(vs, vs->ioc);
+ }
vs->force_update_offset = 0;
} else {
vs->force_update_offset -= ret;
}
+ offset = vs->output.offset;
buffer_advance(&vs->output, ret);
+ if (offset >= vs->throttle_output_offset &&
+ vs->output.offset < vs->throttle_output_offset) {
+ trace_vnc_client_unthrottle_incremental(vs, vs->ioc,
vs->output.offset);
+ }
if (vs->output.offset == 0) {
if (vs->ioc_tag) {
@@ -1549,6 +1570,8 @@ void vnc_write(VncState *vs, const void *data, size_t len)
if (vs->throttle_output_offset != 0 &&
vs->output.offset > (vs->throttle_output_offset *
VNC_THROTTLE_OUTPUT_LIMIT_SCALE)) {
+ trace_vnc_client_output_limit(vs, vs->ioc, vs->output.offset,
+ vs->throttle_output_offset);
vnc_disconnect_start(vs);
return;
}
diff --git a/ui/trace-events b/ui/trace-events
index 1a9f126330..85f74f948b 100644
--- a/ui/trace-events
+++ b/ui/trace-events
@@ -35,6 +35,13 @@ vnc_client_connect(void *state, void *ioc) "VNC client
connect state=%p ioc=%p"
vnc_client_disconnect_start(void *state, void *ioc) "VNC client disconnect
start state=%p ioc=%p"
vnc_client_disconnect_finish(void *state, void *ioc) "VNC client disconnect
finish state=%p ioc=%p"
vnc_client_io_wrap(void *state, void *ioc, const char *type) "VNC client I/O
wrap state=%p ioc=%p type=%s"
+vnc_client_throttle_threshold(void *state, void *ioc, size_t oldoffset, size_t
offset, int client_width, int client_height, int bytes_per_pixel, void
*audio_cap) "VNC client throttle threshold state=%p ioc=%p oldoffset=%zu
newoffset=%zu width=%d height=%d bpp=%d audio=%p"
+vnc_client_throttle_incremental(void *state, void *ioc, int job_update, size_t
offset) "VNC client throttle incremental state=%p ioc=%p job-update=%d
offset=%zu"
+vnc_client_throttle_forced(void *state, void *ioc, int job_update, size_t
offset) "VNC client throttle forced state=%p ioc=%p job-update=%d offset=%zu"
+vnc_client_throttle_audio(void *state, void *ioc, size_t offset) "VNC client
throttle audio state=%p ioc=%p offset=%zu"
+vnc_client_unthrottle_forced(void *state, void *ioc) "VNC client unthrottle
forced offset state=%p ioc=%p"
+vnc_client_unthrottle_incremental(void *state, void *ioc, size_t offset) "VNC
client unthrottle incremental state=%p ioc=%p offset=%zu"
+vnc_client_output_limit(void *state, void *ioc, size_t offset, size_t
threshold) "VNC client output limit state=%p ioc=%p offset=%zu threshold=%zu"
vnc_auth_init(void *display, int websock, int auth, int subauth) "VNC auth
init state=%p websock=%d auth=%d subauth=%d"
vnc_auth_start(void *state, int method) "VNC client auth start state=%p
method=%d"
vnc_auth_pass(void *state, int method) "VNC client auth passed state=%p
method=%d"
--
2.9.3
- [Qemu-devel] [PULL 00/14] Vnc 20180112 patches, Gerd Hoffmann, 2018/01/12
- [Qemu-devel] [PULL 03/14] ui: remove unreachable code in vnc_update_client, Gerd Hoffmann, 2018/01/12
- [Qemu-devel] [PULL 04/14] ui: remove redundant indentation in vnc_client_update, Gerd Hoffmann, 2018/01/12
- [Qemu-devel] [PULL 08/14] ui: correctly reset framebuffer update state after processing dirty regions, Gerd Hoffmann, 2018/01/12
- [Qemu-devel] [PULL 05/14] ui: avoid pointless VNC updates if framebuffer isn't dirty, Gerd Hoffmann, 2018/01/12
- [Qemu-devel] [PULL 07/14] ui: introduce enum to track VNC client framebuffer update request state, Gerd Hoffmann, 2018/01/12
- [Qemu-devel] [PULL 02/14] ui: remove 'sync' parameter from vnc_update_client, Gerd Hoffmann, 2018/01/12
- [Qemu-devel] [PULL 01/14] vnc: fix debug spelling, Gerd Hoffmann, 2018/01/12
- [Qemu-devel] [PULL 09/14] ui: refactor code for determining if an update should be sent to the client, Gerd Hoffmann, 2018/01/12
- [Qemu-devel] [PULL 13/14] ui: add trace events related to VNC client throttling,
Gerd Hoffmann <=
- [Qemu-devel] [PULL 12/14] ui: place a hard cap on VNC server output buffer size, Gerd Hoffmann, 2018/01/12
- [Qemu-devel] [PULL 06/14] ui: track how much decoded data we consumed when doing SASL encoding, Gerd Hoffmann, 2018/01/12
- [Qemu-devel] [PULL 14/14] ui: mix misleading comments & return types of VNC I/O helper methods, Gerd Hoffmann, 2018/01/12
- [Qemu-devel] [PULL 10/14] ui: fix VNC client throttling when audio capture is active, Gerd Hoffmann, 2018/01/12