/* * \/\/\ * * Copyright (C) 2012-2016 Vito Caputo - * * This program is free software: you can redistribute it and/or modify it * under the terms of the GNU General Public License version 3 as published * by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ /* libvmon integration, warning: this gets a little crazy especially in the rendering. */ #include #include #include #include #include #include #include "composite.h" #include "libvmon/vmon.h" #include "list.h" #include "overlay.h" #include "vwm.h" #include "xwindow.h" /* TODO: move to overlay.h */ #define OVERLAY_MASK_DEPTH 8 /* XXX: 1 would save memory, but Xorg isn't good at it */ #define OVERLAY_MASK_FORMAT PictStandardA8 #define OVERLAY_FIXED_FONT "-misc-fixed-medium-r-semicondensed--13-120-75-75-c-60-iso10646-1" #define OVERLAY_ROW_HEIGHT 15 /* this should always be larger than the font height */ #define OVERLAY_GRAPH_MIN_WIDTH 200 /* always create graphs at least this large */ #define OVERLAY_GRAPH_MIN_HEIGHT (4 * OVERLAY_ROW_HEIGHT) #define OVERLAY_ISTHREAD_ARGV "~" /* use this string to mark threads in the argv field */ #define OVERLAY_NOCOMM_ARGV "#missed it!" /* use this string to substitute the command when missing in argv field */ /* libvmon */ static struct timeval maybe_sample, last_sample, this_sample = {0,0}; static typeof(((vmon_sys_stat_t *)0)->user) last_user_cpu; static typeof(((vmon_sys_stat_t *)0)->system) last_system_cpu; static unsigned long long last_total, this_total, total_delta; static unsigned long long last_idle, last_iowait, idle_delta, iowait_delta; static vmon_t vmon; static float sampling_intervals[] = { 1, /* ~1Hz */ .1, /* ~10Hz */ .05, /* ~20Hz */ .025, /* ~40Hz */ .01666}; /* ~60Hz */ static int prev_sampling_interval = 1, sampling_interval = 1; /* space we need for every process being monitored */ typedef struct _vwm_perproc_ctxt_t { typeof(vmon.generation) generation; typeof(((vmon_proc_stat_t *)0)->utime) last_utime; typeof(((vmon_proc_stat_t *)0)->stime) last_stime; typeof(((vmon_proc_stat_t *)0)->utime) utime_delta; typeof(((vmon_proc_stat_t *)0)->stime) stime_delta; } vwm_perproc_ctxt_t; /* Compositing / Overlays */ static XFontStruct *overlay_font; static GC text_gc; static XRenderPictureAttributes pa_repeat = { .repeat = 1 }; static XRenderPictureAttributes pa_no_repeat = { .repeat = 0 }; static Picture overlay_shadow_fill, /* TODO: the repetition here smells like an XMacro waiting to happen */ overlay_text_fill, overlay_bg_fill, overlay_snowflakes_text_fill, overlay_grapha_fill, overlay_graphb_fill, overlay_finish_fill; static XRenderColor overlay_visible_color = { 0xffff, 0xffff, 0xffff, 0xffff }, overlay_shadow_color = { 0x0000, 0x0000, 0x0000, 0x8800}, overlay_bg_color = { 0x0, 0x1000, 0x0, 0x9000}, overlay_div_color = { 0x2000, 0x3000, 0x2000, 0x9000}, overlay_snowflakes_visible_color = { 0xd000, 0xd000, 0xd000, 0x8000 }, overlay_trans_color = {0x00, 0x00, 0x00, 0x00}, overlay_grapha_color = { 0xff00, 0x0000, 0x0000, 0x3000 }, /* ~red */ overlay_graphb_color = { 0x0000, 0xffff, 0xffff, 0x3000 }; /* ~cyan */ /* we need a copy of this pointer for the vmon callback :( */ static vwm_t *vwm_ptr; /* moves what's below a given row up above it if specified, the row becoming discarded */ static void snowflake_row(vwm_t *vwm, vwm_xwindow_t *xwin, Picture pic, int copy, int row) { VWM_TRACE("pid=%i xwin=%p row=%i copy=%i heirarhcy_end=%i", xwin->monitor->pid, xwin, row, copy, xwin->overlay.heirarchy_end); if (copy) { /* copy row to tmp */ XRenderComposite(vwm->display, PictOpSrc, pic, None, xwin->overlay.tmp_picture, 0, row * OVERLAY_ROW_HEIGHT, /* src */ 0, 0, /* mask */ 0, 0, /* dest */ xwin->overlay.width, OVERLAY_ROW_HEIGHT); /* dimensions */ } /* shift up */ XRenderChangePicture(vwm->display, pic, CPRepeat, &pa_no_repeat); XRenderComposite(vwm->display, PictOpSrc, pic, None, pic, 0, (1 + row) * OVERLAY_ROW_HEIGHT, /* src */ 0, 0, /* mask */ 0, row * OVERLAY_ROW_HEIGHT, /* dest */ xwin->overlay.width, (1 + xwin->overlay.heirarchy_end) * OVERLAY_ROW_HEIGHT - (1 + row) * OVERLAY_ROW_HEIGHT); /* dimensions */ XRenderChangePicture(vwm->display, pic, CPRepeat, &pa_repeat); if (copy) { /* copy tmp to top of snowflakes */ XRenderComposite(vwm->display, PictOpSrc, xwin->overlay.tmp_picture, None, pic, 0, 0, /* src */ 0, 0, /* mask */ 0, (xwin->overlay.heirarchy_end) * OVERLAY_ROW_HEIGHT, /* dest */ xwin->overlay.width, OVERLAY_ROW_HEIGHT); /* dimensions */ } else { /* clear the snowflake row */ XRenderFillRectangle(vwm->display, PictOpSrc, pic, &overlay_trans_color, 0, (xwin->overlay.heirarchy_end) * OVERLAY_ROW_HEIGHT, /* dest */ xwin->overlay.width, OVERLAY_ROW_HEIGHT); /* dimensions */ } } /* XXX TODO libvmon automagic children following races with explicit X client pid monitoring with different outcomes, it should be irrelevant which wins, * currently the only visible difference is the snowflakes gap (heirarchy_end) varies, which is why I haven't bothered to fix it, I barely even notice. */ /* shifts what's below a given row down a row, and clears the row, preparing it for populating */ static void allocate_row(vwm_t *vwm, vwm_xwindow_t *xwin, Picture pic, int row) { VWM_TRACE("pid=%i xwin=%p row=%i", xwin->monitor->pid, xwin, row); /* shift everything below the row down */ XRenderComposite(vwm->display, PictOpSrc, pic, None, pic, 0, row * OVERLAY_ROW_HEIGHT, /* src */ 0, 0, /* mask */ 0, (1 + row) * OVERLAY_ROW_HEIGHT, /* dest */ xwin->overlay.width, xwin->overlay.height - (1 + row) * OVERLAY_ROW_HEIGHT); /* dimensions */ /* fill the space created with transparent pixels */ XRenderFillRectangle(vwm->display, PictOpSrc, pic, &overlay_trans_color, 0, row * OVERLAY_ROW_HEIGHT, /* dest */ xwin->overlay.width, OVERLAY_ROW_HEIGHT); /* dimensions */ } /* shadow a row from the text layer in the shadow layer */ static void shadow_row(vwm_t *vwm, vwm_xwindow_t *xwin, int row) { /* the current technique for creating the shadow is to simply render the text at +1/-1 pixel offsets on both axis in translucent black */ XRenderComposite(vwm->display, PictOpSrc, overlay_shadow_fill, xwin->overlay.text_picture, xwin->overlay.shadow_picture, 0, 0, -1, row * OVERLAY_ROW_HEIGHT, 0, row * OVERLAY_ROW_HEIGHT, xwin->attrs.width, OVERLAY_ROW_HEIGHT); XRenderComposite(vwm->display, PictOpOver, overlay_shadow_fill, xwin->overlay.text_picture, xwin->overlay.shadow_picture, 0, 0, 0, -1 + row * OVERLAY_ROW_HEIGHT, 0, row * OVERLAY_ROW_HEIGHT, xwin->attrs.width, OVERLAY_ROW_HEIGHT); XRenderComposite(vwm->display, PictOpOver, overlay_shadow_fill, xwin->overlay.text_picture, xwin->overlay.shadow_picture, 0, 0, 1, row * OVERLAY_ROW_HEIGHT, 0, row * OVERLAY_ROW_HEIGHT, xwin->attrs.width, OVERLAY_ROW_HEIGHT); XRenderComposite(vwm->display, PictOpOver, overlay_shadow_fill, xwin->overlay.text_picture, xwin->overlay.shadow_picture, 0, 0, 0, 1 + row * OVERLAY_ROW_HEIGHT, 0, row * OVERLAY_ROW_HEIGHT, xwin->attrs.width, OVERLAY_ROW_HEIGHT); } /* simple helper to map the vmon per-proc argv array into an XTextItem array, deals with threads vs. processes and the possibility of the comm field not getting read in before the process exited... */ static void argv2xtext(vmon_proc_t *proc, XTextItem *items, int *nr_items) /* XXX TODO: reallocate items when too small... */ { int i; int nr = 0; if (proc->is_thread) { /* stick the thread marker at the start of threads */ items[0].nchars = sizeof(OVERLAY_ISTHREAD_ARGV) - 1; items[0].chars = OVERLAY_ISTHREAD_ARGV; items[0].delta = 4; items[0].font = None; nr++; } if (((vmon_proc_stat_t *)proc->stores[VMON_STORE_PROC_STAT])->comm.len) { items[nr].nchars = ((vmon_proc_stat_t *)proc->stores[VMON_STORE_PROC_STAT])->comm.len - 1; items[nr].chars = ((vmon_proc_stat_t *)proc->stores[VMON_STORE_PROC_STAT])->comm.array; } else { /* sometimes a process is so ephemeral we don't manage to sample its comm, XXX TODO: we always have a pid, stringify it? */ items[nr].nchars = sizeof(OVERLAY_NOCOMM_ARGV) - 1; items[nr].chars = OVERLAY_NOCOMM_ARGV; } items[nr].delta = 4; items[nr].font = None; nr++; for (i = 1; i < ((vmon_proc_stat_t *)proc->stores[VMON_STORE_PROC_STAT])->argc; nr++, i++) { items[nr].chars = ((vmon_proc_stat_t *)proc->stores[VMON_STORE_PROC_STAT])->argv[i]; items[nr].nchars = strlen(((vmon_proc_stat_t *)proc->stores[VMON_STORE_PROC_STAT])->argv[i]); /* TODO: libvmon should inform us of the length */ items[nr].delta = 4; items[nr].font = None; } (*nr_items) = nr; } /* helper for counting number of existing descendants subtrees */ static int count_rows(vmon_proc_t *proc) { int count = 1; /* XXX maybe suppress proc->is_new? */ vmon_proc_t *child; if (!proc->is_thread) { list_for_each_entry(child, &proc->threads, threads) { count += count_rows(child); } } list_for_each_entry(child, &proc->children, siblings) { count += count_rows(child); } return count; } /* helper for drawing the vertical bars in the graph layers */ static void draw_bars(vwm_t *vwm, vwm_xwindow_t *xwin, int row, double a_fraction, double a_total, double b_fraction, double b_total) { int a_height, b_height; /* compute the bar heights for this sample */ a_height = (a_fraction / a_total * (double)(OVERLAY_ROW_HEIGHT - 1)); /* give up 1 pixel for the div */ b_height = (b_fraction / b_total * (double)(OVERLAY_ROW_HEIGHT - 1)); /* round up to 1 pixel when the scaled result is a fraction less than 1, * I want to at least see 1 pixel blips for the slightest cpu utilization */ if (a_fraction && !a_height) a_height = 1; if (b_fraction && !b_height) b_height = 1; /* draw the two bars for this sample at the current phase in the graphs, note the first is ceiling-based, second floor-based */ XRenderFillRectangle(vwm->display, PictOpSrc, xwin->overlay.grapha_picture, &overlay_visible_color, xwin->overlay.phase, row * OVERLAY_ROW_HEIGHT, /* dst x, y */ 1, a_height); /* dst w, h */ XRenderFillRectangle(vwm->display, PictOpSrc, xwin->overlay.graphb_picture, &overlay_visible_color, xwin->overlay.phase, row * OVERLAY_ROW_HEIGHT + (OVERLAY_ROW_HEIGHT - b_height) - 1, /* dst x, y */ 1, b_height); /* dst w, h */ } /* draws proc in a row of the process heirarchy */ static void draw_heirarchy_row(vwm_t *vwm, vwm_xwindow_t *xwin, vmon_proc_t *proc, int depth, int row) { vmon_proc_stat_t *proc_stat = proc->stores[VMON_STORE_PROC_STAT]; vmon_proc_t *child; char str[256]; int str_len, str_width; XTextItem items[1024]; /* XXX TODO: dynamically allocate this and just keep it at the high water mark.. create a struct to encapsulate this, nr_items, and alloc_items... */ int nr_items; /* process heirarchy text and accompanying per-process details like wchan/pid/state... */ /* this stuff can be skipped when monitors aren't visible */ /* TODO: make the columns interactively configurable @ runtime */ if (!proc->is_new) { /* XXX for now always clear the row, this should be capable of being optimized in the future (if the datums driving the text haven't changed...) */ XRenderFillRectangle(vwm->display, PictOpSrc, xwin->overlay.text_picture, &overlay_trans_color, 0, row * OVERLAY_ROW_HEIGHT, /* dst x, y */ xwin->overlay.width, OVERLAY_ROW_HEIGHT); /* dst w, h */ } /* put the process' wchan, state, and PID columns @ the far right */ if (proc->is_thread || list_empty(&proc->threads)) { /* only threads or non-threaded processes include the wchan and state */ snprintf(str, sizeof(str), " %.*s %5i %c %n", proc_stat->wchan.len, proc_stat->wchan.len == 1 && proc_stat->wchan.array[0] == '0' ? "-" : proc_stat->wchan.array, proc->pid, proc_stat->state, &str_len); } else { /* we're a process having threads, suppress the wchan and state, as they will be displayed for the thread of same pid */ snprintf(str, sizeof(str), " %5i %n", proc->pid, &str_len); } str_width = XTextWidth(overlay_font, str, str_len); /* the process' comm label indented according to depth, followed with their respective argv's */ argv2xtext(proc, items, &nr_items); XDrawText(vwm->display, xwin->overlay.text_pixmap, text_gc, depth * (OVERLAY_ROW_HEIGHT / 2), (row + 1) * OVERLAY_ROW_HEIGHT - 3, /* dst x, y */ items, nr_items); /* ensure the area for the rest of the stuff is cleared, we don't put much text into thread rows so skip it for those. */ if (!proc->is_thread) { XRenderFillRectangle(vwm->display, PictOpSrc, xwin->overlay.text_picture, &overlay_trans_color, xwin->attrs.width - str_width, row * OVERLAY_ROW_HEIGHT, /* dst x,y */ xwin->overlay.width - (xwin->attrs.width - str_width), OVERLAY_ROW_HEIGHT); /* dst w,h */ } XDrawString(vwm->display, xwin->overlay.text_pixmap, text_gc, xwin->attrs.width - str_width, (row + 1) * OVERLAY_ROW_HEIGHT - 3, /* dst x, y */ str, str_len); /* only if this process isn't the root process @ the window shall we consider all relational drawing conditions */ if (proc != xwin->monitor) { vmon_proc_t *ancestor, *sibling, *last_sibling = NULL; struct list_head *rem; int needs_tee = 0; int bar_x = 0, bar_y = 0; int sub; /* XXX: everything done in this code block only dirties _this_ process' row in the rendered overlay output */ /* walk up the ancestors until reaching xwin->monitor, any ancestors we encounter which have more siblings we draw a vertical bar for */ /* this draws the |'s in something like: | | | | comm */ for (sub = 1, ancestor = proc->parent; ancestor && ancestor != xwin->monitor; ancestor = ancestor->parent) { sub++; bar_x = (depth - sub) * (OVERLAY_ROW_HEIGHT / 2) + 4; bar_y = (row + 1) * OVERLAY_ROW_HEIGHT; /* determine if the ancestor has remaining siblings which are not stale, if so, draw a connecting bar at its depth */ for (rem = ancestor->siblings.next; rem != &ancestor->parent->children; rem = rem->next) { if (!(list_entry(rem, vmon_proc_t, siblings)->is_stale)) { XDrawLine(vwm->display, xwin->overlay.text_pixmap, text_gc, bar_x, bar_y - OVERLAY_ROW_HEIGHT, /* dst x1, y1 */ bar_x, bar_y); /* dst x2, y2 (vertical line) */ break; /* stop looking for more siblings at this ancestor when we find one that isn't stale */ } } } /* determine if _any_ of our siblings have children requiring us to draw a tee immediately before our comm string. * The only sibling which doesn't cause this to happen is the last one in the children list, if it has children it has no impact on its remaining * siblings, as there are none. * * This draws the + in something like: | | | | +comm */ /* find the last sibling (this has to be done due to the potential for stale siblings at the tail, and we'd rather not repeatedly check for it) */ list_for_each_entry(sibling, &proc->parent->children, siblings) { if (!sibling->is_stale) last_sibling = sibling; } /* now look for siblings with non-stale children to determine if a tee is needed, ignoring the last sibling */ list_for_each_entry(sibling, &proc->parent->children, siblings) { /* skip stale siblings, they aren't interesting as they're invisible, and the last sibling has no bearing on wether we tee or not. */ if (sibling->is_stale || sibling == last_sibling) continue; /* if any of the other siblings have children which are not stale, put a tee in front of our name, but ignore stale children */ list_for_each_entry(child, &sibling->children, siblings) { if (!child->is_stale) { needs_tee = 1; break; } } /* if we still don't think we need a tee, check if there are threads */ if (!needs_tee) { list_for_each_entry(child, &sibling->threads, threads) { if (!child->is_stale) { needs_tee = 1; break; } } } /* found a tee is necessary, all that's left is to determine if the tee is a corner and draw it accordingly, stopping the search. */ if (needs_tee) { bar_x = (depth - 1) * (OVERLAY_ROW_HEIGHT / 2) + 4; /* if we're the last sibling, corner the tee by shortening the vbar */ if (proc == last_sibling) { XDrawLine(vwm->display, xwin->overlay.text_pixmap, text_gc, bar_x, bar_y - OVERLAY_ROW_HEIGHT, /* dst x1, y1 */ bar_x, bar_y - 4); /* dst x2, y2 (vertical bar) */ } else { XDrawLine(vwm->display, xwin->overlay.text_pixmap, text_gc, bar_x, bar_y - OVERLAY_ROW_HEIGHT, /* dst x1, y1 */ bar_x, bar_y); /* dst x2, y2 (vertical bar) */ } XDrawLine(vwm->display, xwin->overlay.text_pixmap, text_gc, bar_x, bar_y - 4, /* dst x1, y1 */ bar_x + 2, bar_y - 4); /* dst x2, y2 (horizontal bar) */ /* terminate the outer sibling loop upon drawing the tee... */ break; } } } shadow_row(vwm, xwin, row); } /* recursive draw function for "rest" of overlay: the per-process rows (heirarchy, argv, state, wchan, pid...) */ static void draw_overlay_rest(vwm_t *vwm, vwm_xwindow_t *xwin, vmon_proc_t *proc, int *depth, int *row) { vmon_proc_t *child; vwm_perproc_ctxt_t *proc_ctxt = proc->foo; vmon_proc_stat_t *proc_stat = proc->stores[VMON_STORE_PROC_STAT]; /* graph variables */ double utime_delta, stime_delta; /* text variables */ XTextItem items[1024]; /* XXX TODO: dynamically allocate this and just keep it at the high water mark.. create a struct to encapsulate this, nr_items, and alloc_items... */ int nr_items; /* Some parts of this we must do on every sample to maintain coherence in the graphs, since they're incrementally kept * in sync with the process heirarchy, allocating and shifting the rows as processes are created and destroyed. Everything * else we should be able to skip doing unless overlay.redraw_needed or their contents changed. */ if (proc->is_stale) { /* what to do when a process (subtree) has gone away */ static int in_stale = 0; int in_stale_entrypoint = 0; /* I snowflake the stale processes from the leaves up for a more intuitive snowflake order... * (I expect the command at the root of the subtree to appear at the top of the snowflakes...) */ /* This does require that I do a separate forward recursion to determine the number of rows * so I can correctly snowflake in reverse */ if (!in_stale) { VWM_TRACE("entered stale at xwin=%p depth=%i row=%i", xwin, *depth, *row); in_stale_entrypoint = in_stale = 1; (*row) += count_rows(proc) - 1; } (*depth)++; list_for_each_entry_prev(child, &proc->children, siblings) { draw_overlay_rest(vwm, xwin, child, depth, row); (*row)--; } if (!proc->is_thread) { list_for_each_entry_prev(child, &proc->threads, threads) { draw_overlay_rest(vwm, xwin, child, depth, row); (*row)--; } } (*depth)--; VWM_TRACE("%i (%.*s) is stale @ depth %i row %i is_thread=%i", proc->pid, ((vmon_proc_stat_t *)proc->stores[VMON_STORE_PROC_STAT])->comm.len - 1, ((vmon_proc_stat_t *)proc->stores[VMON_STORE_PROC_STAT])->comm.array, (*depth), (*row), proc->is_thread); /* stamp the graphs with the finish line */ XRenderComposite(vwm->display, PictOpSrc, overlay_finish_fill, None, xwin->overlay.grapha_picture, 0, 0, /* src x, y */ 0, 0, /* mask x, y */ xwin->overlay.phase, (*row) * OVERLAY_ROW_HEIGHT, /* dst x, y */ 1, OVERLAY_ROW_HEIGHT - 1); XRenderComposite(vwm->display, PictOpSrc, overlay_finish_fill, None, xwin->overlay.graphb_picture, 0, 0, /* src x, y */ 0, 0, /* mask x, y */ xwin->overlay.phase, (*row) * OVERLAY_ROW_HEIGHT, /* dst x, y */ 1, OVERLAY_ROW_HEIGHT - 1); /* extract the row from the various layers */ snowflake_row(vwm, xwin, xwin->overlay.grapha_picture, 1, (*row)); snowflake_row(vwm, xwin, xwin->overlay.graphb_picture, 1, (*row)); snowflake_row(vwm, xwin, xwin->overlay.text_picture, 0, (*row)); snowflake_row(vwm, xwin, xwin->overlay.shadow_picture, 0, (*row)); xwin->overlay.snowflakes_cnt++; /* stamp the name (and whatever else we include) into overlay.text_picture */ argv2xtext(proc, items, &nr_items); XDrawText(vwm->display, xwin->overlay.text_pixmap, text_gc, 5, (xwin->overlay.heirarchy_end + 1) * OVERLAY_ROW_HEIGHT - 3,/* dst x, y */ items, nr_items); shadow_row(vwm, xwin, xwin->overlay.heirarchy_end); xwin->overlay.heirarchy_end--; if (in_stale_entrypoint) { VWM_TRACE("exited stale at xwin=%p depth=%i row=%i", xwin, *depth, *row); in_stale = 0; } return; } else if (proc->is_new) { /* what to do when a process has been introduced */ VWM_TRACE("%i is new", proc->pid); allocate_row(vwm, xwin, xwin->overlay.grapha_picture, (*row)); allocate_row(vwm, xwin, xwin->overlay.graphb_picture, (*row)); allocate_row(vwm, xwin, xwin->overlay.text_picture, (*row)); allocate_row(vwm, xwin, xwin->overlay.shadow_picture, (*row)); xwin->overlay.heirarchy_end++; } /* CPU utilization graphs */ /* use the generation number to avoid recomputing this stuff for callbacks recurring on the same process in the same sample */ if (proc_ctxt->generation != vmon.generation) { proc_ctxt->stime_delta = proc_stat->stime - proc_ctxt->last_stime; proc_ctxt->utime_delta = proc_stat->utime - proc_ctxt->last_utime; proc_ctxt->last_utime = proc_stat->utime; proc_ctxt->last_stime = proc_stat->stime; proc_ctxt->generation = vmon.generation; } if (proc->is_new) { /* we need a minimum of two samples before we can compute a delta to plot, * so we suppress that and instead mark the start of monitoring with an impossible 100% of both graph contexts, a starting line. */ stime_delta = utime_delta = total_delta; } else { stime_delta = proc_ctxt->stime_delta; utime_delta = proc_ctxt->utime_delta; } draw_bars(vwm, xwin, *row, stime_delta, total_delta, utime_delta, total_delta); draw_heirarchy_row(vwm, xwin, proc, *depth, *row); (*row)++; /* recur any threads first, then any children processes */ (*depth)++; if (!proc->is_thread) { /* XXX: the threads member serves as the list head only when not a thread */ list_for_each_entry(child, &proc->threads, threads) { draw_overlay_rest(vwm, xwin, child, depth, row); } } list_for_each_entry(child, &proc->children, siblings) { draw_overlay_rest(vwm, xwin, child, depth, row); } (*depth)--; } /* recursive draw function entrypoint, draws the IOWait/Idle/HZ row, then enters draw_overlay_rest() */ static void draw_overlay(vwm_t *vwm, vwm_xwindow_t *xwin, vmon_proc_t *proc, int *depth, int *row) { vmon_proc_t *child; vwm_perproc_ctxt_t *proc_ctxt = proc->foo; vmon_proc_stat_t *proc_stat = proc->stores[VMON_STORE_PROC_STAT]; /* text variables */ char str[256]; int str_len, str_width; /* CPU utilization graphs */ /* IOWait and Idle % @ row 0 */ draw_bars(vwm, xwin, *row, iowait_delta, total_delta, idle_delta, total_delta); /* only draw the \/\/\ and HZ if necessary */ if (xwin->overlay.redraw_needed || prev_sampling_interval != sampling_interval) { snprintf(str, sizeof(str), "\\/\\/\\ %2iHz %n", (int)(sampling_interval < 0 ? 0 : 1 / sampling_intervals[sampling_interval]), &str_len); XRenderFillRectangle(vwm->display, PictOpSrc, xwin->overlay.text_picture, &overlay_trans_color, 0, 0, /* dst x, y */ xwin->attrs.width, OVERLAY_ROW_HEIGHT); /* dst w, h */ str_width = XTextWidth(overlay_font, str, str_len); XDrawString(vwm->display, xwin->overlay.text_pixmap, text_gc, xwin->attrs.width - str_width, OVERLAY_ROW_HEIGHT - 3, /* dst x, y */ str, str_len); shadow_row(vwm, xwin, 0); } (*row)++; draw_overlay_rest(vwm, xwin, proc, depth, row); xwin->overlay.redraw_needed = 0; return; } /* consolidated version of overlay text and graph rendering, makes snowflakes integration cleaner, this always gets called regadless of the overlays mode */ static void maintain_overlay(vwm_t *vwm, vwm_xwindow_t *xwin) { int row = 0, depth = 0; if (!xwin->monitor || !xwin->monitor->stores[VMON_STORE_PROC_STAT]) return; /* TODO: * I side effect of responding to window resizes in this function is there's a latency proportional to the current sample_interval. * Something to fix is to resize the overlays when the window resizes. * However, simply resizing the overlays is insufficient. Their contents need to be redrawn in the new dimensions, this is where it * gets annoying. The current maintain/draw_overlay makes assumptions about being run from the periodic vmon per-process callback. * There needs to be a redraw mode added where draw_overlay is just reconstructing the current state, which requires that we suppress * the phase advance and in maintain_overlay() and just enter draw_overlay() to redraw everything for the same generation. * So this probably requires some tweaking of draw_overlay() as well as maintain_overlay(). I want to be able tocall mainta_overlays() * from anywhere, and have it detect if it's being called on the same generation or if the generation has advanced. * For now, the monitors will just be a little latent in window resizes which is pretty harmless artifact. */ if (xwin->attrs.width != xwin->overlay.width || xwin->attrs.height != xwin->overlay.height) xwin->overlay.redraw_needed = 1; /* if the window is larger than the overlays currently are, enlarge them */ if (xwin->attrs.width > xwin->overlay.width || xwin->attrs.height > xwin->overlay.height) { vwm_overlay_t existing; Pixmap pixmap; existing = xwin->overlay; xwin->overlay.width = MAX(xwin->overlay.width, MAX(xwin->attrs.width, OVERLAY_GRAPH_MIN_WIDTH)); xwin->overlay.height = MAX(xwin->overlay.height, MAX(xwin->attrs.height, OVERLAY_GRAPH_MIN_HEIGHT)); pixmap = XCreatePixmap(vwm->display, VWM_XROOT(vwm), xwin->overlay.width, xwin->overlay.height, OVERLAY_MASK_DEPTH); xwin->overlay.grapha_picture = XRenderCreatePicture(vwm->display, pixmap, XRenderFindStandardFormat(vwm->display, OVERLAY_MASK_FORMAT), CPRepeat, &pa_repeat); XFreePixmap(vwm->display, pixmap); XRenderFillRectangle(vwm->display, PictOpSrc, xwin->overlay.grapha_picture, &overlay_trans_color, 0, 0, xwin->overlay.width, xwin->overlay.height); pixmap = XCreatePixmap(vwm->display, VWM_XROOT(vwm), xwin->overlay.width, xwin->overlay.height, OVERLAY_MASK_DEPTH); xwin->overlay.graphb_picture = XRenderCreatePicture(vwm->display, pixmap, XRenderFindStandardFormat(vwm->display, OVERLAY_MASK_FORMAT), CPRepeat, &pa_repeat); XFreePixmap(vwm->display, pixmap); XRenderFillRectangle(vwm->display, PictOpSrc, xwin->overlay.graphb_picture, &overlay_trans_color, 0, 0, xwin->overlay.width, xwin->overlay.height); pixmap = XCreatePixmap(vwm->display, VWM_XROOT(vwm), xwin->overlay.width, OVERLAY_ROW_HEIGHT, OVERLAY_MASK_DEPTH); xwin->overlay.tmp_picture = XRenderCreatePicture(vwm->display, pixmap, XRenderFindStandardFormat(vwm->display, OVERLAY_MASK_FORMAT), 0, NULL); XFreePixmap(vwm->display, pixmap); /* keep the text_pixmap reference around for XDrawText usage */ xwin->overlay.text_pixmap = XCreatePixmap(vwm->display, VWM_XROOT(vwm), xwin->overlay.width, xwin->overlay.height, OVERLAY_MASK_DEPTH); xwin->overlay.text_picture = XRenderCreatePicture(vwm->display, xwin->overlay.text_pixmap, XRenderFindStandardFormat(vwm->display, OVERLAY_MASK_FORMAT), 0, NULL); XRenderFillRectangle(vwm->display, PictOpSrc, xwin->overlay.text_picture, &overlay_trans_color, 0, 0, xwin->overlay.width, xwin->overlay.height); pixmap = XCreatePixmap(vwm->display, VWM_XROOT(vwm), xwin->overlay.width, xwin->overlay.height, OVERLAY_MASK_DEPTH); xwin->overlay.shadow_picture = XRenderCreatePicture(vwm->display, pixmap, XRenderFindStandardFormat(vwm->display, OVERLAY_MASK_FORMAT), 0, NULL); XFreePixmap(vwm->display, pixmap); XRenderFillRectangle(vwm->display, PictOpSrc, xwin->overlay.shadow_picture, &overlay_trans_color, 0, 0, xwin->overlay.width, xwin->overlay.height); pixmap = XCreatePixmap(vwm->display, VWM_XROOT(vwm), xwin->overlay.width, xwin->overlay.height, 32); xwin->overlay.picture = XRenderCreatePicture(vwm->display, pixmap, XRenderFindStandardFormat(vwm->display, PictStandardARGB32), 0, NULL); XFreePixmap(vwm->display, pixmap); if (existing.width) { /* XXX: note the graph pictures are copied from their current phase in the x dimension */ XRenderComposite(vwm->display, PictOpSrc, existing.grapha_picture, None, xwin->overlay.grapha_picture, existing.phase, 0, /* src x, y */ 0, 0, /* mask x, y */ 0, 0, /* dest x, y */ existing.width, existing.height); XRenderComposite(vwm->display, PictOpSrc, existing.graphb_picture, None, xwin->overlay.graphb_picture, existing.phase, 0, /* src x, y */ 0, 0, /* mask x, y */ 0, 0, /* dest x, y */ existing.width, existing.height); XRenderComposite(vwm->display, PictOpSrc, existing.text_picture, None, xwin->overlay.text_picture, 0, 0, /* src x, y */ 0, 0, /* mask x, y */ 0, 0, /* dest x, y */ existing.width, existing.height); XRenderComposite(vwm->display, PictOpSrc, existing.shadow_picture, None, xwin->overlay.shadow_picture, 0, 0, /* src x, y */ 0, 0, /* mask x, y */ 0, 0, /* dest x, y */ existing.width, existing.height); XRenderComposite(vwm->display, PictOpSrc, existing.picture, None, xwin->overlay.picture, 0, 0, /* src x, y */ 0, 0, /* mask x, y */ 0, 0, /* dest x, y */ existing.width, existing.height); xwin->overlay.phase = 0; /* having unrolled the existing graph[ab] pictures into the larger ones, phase is reset to 0 */ XRenderFreePicture(vwm->display, existing.grapha_picture); XRenderFreePicture(vwm->display, existing.graphb_picture); XRenderFreePicture(vwm->display, existing.tmp_picture); XRenderFreePicture(vwm->display, existing.text_picture); XFreePixmap(vwm->display, existing.text_pixmap); XRenderFreePicture(vwm->display, existing.shadow_picture); XRenderFreePicture(vwm->display, existing.picture); } } xwin->overlay.phase += (xwin->overlay.width - 1); /* simply change this to .phase++ to scroll the other direction */ xwin->overlay.phase %= xwin->overlay.width; XRenderFillRectangle(vwm->display, PictOpSrc, xwin->overlay.grapha_picture, &overlay_trans_color, xwin->overlay.phase, 0, 1, xwin->overlay.height); XRenderFillRectangle(vwm->display, PictOpSrc, xwin->overlay.graphb_picture, &overlay_trans_color, xwin->overlay.phase, 0, 1, xwin->overlay.height); /* recursively draw the monitored processes to the overlay */ draw_overlay(vwm, xwin, xwin->monitor, &depth, &row); } /* this callback gets invoked at sample time for every process we've explicitly monitored (not autofollowed children/threads) * It's where we update the cumulative data for all windows, including the graph masks, regardless of their visibility * It's also where we compose the graphs and text for visible windows into a picture ready for compositing with the window contents */ static void proc_sample_callback(vmon_t *vmon, vmon_proc_t *proc, vwm_xwindow_t *xwin) { //VWM_TRACE("proc=%p xwin=%p", proc, xwin); /* render the various always-updated overlays, this is the component we do regardless of the overlays mode and window visibility, * essentially the incrementally rendered/historic components */ maintain_overlay(vwm_ptr, xwin); /* if we've updated overlays for a mapped window, kick the compositor to do the costly parts of overlay drawing and compositing. */ if (vwm_xwin_is_mapped(vwm_ptr, xwin)) vwm_composite_repaint_needed(vwm_ptr); } /* this callback gets invoked at sample time once "per sys" */ static void sample_callback(vmon_t *_vmon) { vmon_sys_stat_t *sys_stat = vmon.stores[VMON_STORE_SYS_STAT]; this_total = sys_stat->user + sys_stat->nice + sys_stat->system + sys_stat->idle + sys_stat->iowait + sys_stat->irq + sys_stat->softirq + sys_stat->steal + sys_stat->guest; total_delta = this_total - last_total; idle_delta = sys_stat->idle - last_idle; iowait_delta = sys_stat->iowait - last_iowait; } /* these callbacks are invoked by the vmon library when process instances become monitored/unmonitored */ static void vmon_ctor_cb(vmon_t *vmon, vmon_proc_t *proc) { VWM_TRACE("proc->pid=%i", proc->pid); proc->foo = calloc(1, sizeof(vwm_perproc_ctxt_t)); } static void vmon_dtor_cb(vmon_t *vmon, vmon_proc_t *proc) { VWM_TRACE("proc->pid=%i", proc->pid); if (proc->foo) { free(proc->foo); proc->foo = NULL; } } /* return the composed height of the overlay */ int vwm_overlay_xwin_composed_height(vwm_t *vwm, vwm_xwindow_t *xwin) { int snowflakes = xwin->overlay.snowflakes_cnt ? 1 + xwin->overlay.snowflakes_cnt : 0; /* don't include the separator row if there are no snowflakes */ return MIN((xwin->overlay.heirarchy_end + snowflakes) * OVERLAY_ROW_HEIGHT, xwin->attrs.height); } /* reset snowflakes on the specified window */ void vwm_overlay_xwin_reset_snowflakes(vwm_t *vwm, vwm_xwindow_t *xwin) { if (xwin->overlay.snowflakes_cnt) { xwin->overlay.snowflakes_cnt = 0; vwm_composite_damage_win(vwm, xwin); } } static void init_overlay(vwm_t *vwm) { static int initialized; Window bitmask; if (initialized) return; initialized = 1; /* we stow the vwm pointer so the vmon callback can access it, rather than allocating something * to encapsulate the xwin and vwm pointers just for the callback... */ vwm_ptr = vwm; /* initialize libvmon */ vmon_init(&vmon, VMON_FLAG_2PASS, VMON_WANT_SYS_STAT, (VMON_WANT_PROC_STAT | VMON_WANT_PROC_FOLLOW_CHILDREN | VMON_WANT_PROC_FOLLOW_THREADS)); vmon.proc_ctor_cb = vmon_ctor_cb; vmon.proc_dtor_cb = vmon_dtor_cb; vmon.sample_cb = sample_callback; gettimeofday(&this_sample, NULL); /* get all the text and graphics stuff setup for overlays */ overlay_font = XLoadQueryFont(vwm->display, OVERLAY_FIXED_FONT); /* create a GC for rendering the text using Xlib into the text overlay stencils */ bitmask = XCreatePixmap(vwm->display, VWM_XROOT(vwm), 1, 1, OVERLAY_MASK_DEPTH); text_gc = XCreateGC(vwm->display, bitmask, 0, NULL); XSetForeground(vwm->display, text_gc, WhitePixel(vwm->display, vwm->screen_num)); XFreePixmap(vwm->display, bitmask); /* create some repeating source fill pictures for drawing through the text and graph stencils */ bitmask = XCreatePixmap(vwm->display, VWM_XROOT(vwm), 1, 1, 32); overlay_text_fill = XRenderCreatePicture(vwm->display, bitmask, XRenderFindStandardFormat(vwm->display, PictStandardARGB32), CPRepeat, &pa_repeat); XRenderFillRectangle(vwm->display, PictOpSrc, overlay_text_fill, &overlay_visible_color, 0, 0, 1, 1); bitmask = XCreatePixmap(vwm->display, VWM_XROOT(vwm), 1, 1, 32); overlay_shadow_fill = XRenderCreatePicture(vwm->display, bitmask, XRenderFindStandardFormat(vwm->display, PictStandardARGB32), CPRepeat, &pa_repeat); XRenderFillRectangle(vwm->display, PictOpSrc, overlay_shadow_fill, &overlay_shadow_color, 0, 0, 1, 1); bitmask = XCreatePixmap(vwm->display, VWM_XROOT(vwm), 1, OVERLAY_ROW_HEIGHT, 32); overlay_bg_fill = XRenderCreatePicture(vwm->display, bitmask, XRenderFindStandardFormat(vwm->display, PictStandardARGB32), CPRepeat, &pa_repeat); XRenderFillRectangle(vwm->display, PictOpSrc, overlay_bg_fill, &overlay_bg_color, 0, 0, 1, OVERLAY_ROW_HEIGHT); XRenderFillRectangle(vwm->display, PictOpSrc, overlay_bg_fill, &overlay_div_color, 0, OVERLAY_ROW_HEIGHT - 1, 1, 1); bitmask = XCreatePixmap(vwm->display, VWM_XROOT(vwm), 1, 1, 32); overlay_snowflakes_text_fill = XRenderCreatePicture(vwm->display, bitmask, XRenderFindStandardFormat(vwm->display, PictStandardARGB32), CPRepeat, &pa_repeat); XRenderFillRectangle(vwm->display, PictOpSrc, overlay_snowflakes_text_fill, &overlay_snowflakes_visible_color, 0, 0, 1, 1); bitmask = XCreatePixmap(vwm->display, VWM_XROOT(vwm), 1, 1, 32); overlay_grapha_fill = XRenderCreatePicture(vwm->display, bitmask, XRenderFindStandardFormat(vwm->display, PictStandardARGB32), CPRepeat, &pa_repeat); XRenderFillRectangle(vwm->display, PictOpSrc, overlay_grapha_fill, &overlay_grapha_color, 0, 0, 1, 1); bitmask = XCreatePixmap(vwm->display, VWM_XROOT(vwm), 1, 1, 32); overlay_graphb_fill = XRenderCreatePicture(vwm->display, bitmask, XRenderFindStandardFormat(vwm->display, PictStandardARGB32), CPRepeat, &pa_repeat); XRenderFillRectangle(vwm->display, PictOpSrc, overlay_graphb_fill, &overlay_graphb_color, 0, 0, 1, 1); bitmask = XCreatePixmap(vwm->display, VWM_XROOT(vwm), 1, 2, 32); overlay_finish_fill = XRenderCreatePicture(vwm->display, bitmask, XRenderFindStandardFormat(vwm->display, PictStandardARGB32), CPRepeat, &pa_repeat); XRenderFillRectangle(vwm->display, PictOpSrc, overlay_finish_fill, &overlay_visible_color, 0, 0, 1, 1); XRenderFillRectangle(vwm->display, PictOpSrc, overlay_finish_fill, &overlay_trans_color, 0, 1, 1, 1); } /* install a monitor on the window if it doesn't already have one and has _NET_WM_PID set */ void vwm_overlay_xwin_create(vwm_t *vwm, vwm_xwindow_t *xwin) { Atom type; int fmt; unsigned long nitems; unsigned long nbytes; long *foo = NULL; int pid = -1; init_overlay(vwm); if (xwin->monitor) return; if (XGetWindowProperty(vwm->display, xwin->id, vwm->wm_pid_atom, 0, 1, False, XA_CARDINAL, &type, &fmt, &nitems, &nbytes, (unsigned char **)&foo) != Success || !foo) return; pid = *foo; XFree(foo); /* add the client process to the monitoring heirarchy */ /* XXX note libvmon here maintains a unique callback for each unique callback+xwin pair, so multi-window processes work */ xwin->monitor = vmon_proc_monitor(&vmon, NULL, pid, VMON_WANT_PROC_INHERIT, (void (*)(vmon_t *, vmon_proc_t *, void *))proc_sample_callback, xwin); /* FIXME: count_rows() isn't returning the right count sometimes (off by ~1), it seems to be related to racing with the automatic child monitoring */ /* the result is an extra row sometimes appearing below the process heirarchy */ xwin->overlay.heirarchy_end = 1 + count_rows(xwin->monitor); xwin->overlay.snowflakes_cnt = 0; } /* remove monitoring on the window if installed */ void vwm_overlay_xwin_destroy(vwm_t *vwm, vwm_xwindow_t *xwin) { if (xwin->monitor) vmon_proc_unmonitor(&vmon, xwin->monitor, (void (*)(vmon_t *, vmon_proc_t *, void *))proc_sample_callback, xwin); } /* this composes the maintained overlay into the window's overlay picture, this gets called from paint_all() on every repaint of xwin */ /* we noop the call if the gen_last_composed and monitor->proc.generation numbers match, indicating there's nothing new to compose. */ void vwm_overlay_xwin_compose(vwm_t *vwm, vwm_xwindow_t *xwin) { XserverRegion region; XRectangle damage; int height; if (!xwin->overlay.width) return; /* prevent winning race with maintain_overlay() and using an unready overlay... */ if (xwin->overlay.gen_last_composed == xwin->monitor->generation) return; /* noop if no sampling occurred since last compose */ xwin->overlay.gen_last_composed = xwin->monitor->generation; /* remember this generation */ //VWM_TRACE("composing %p", xwin); height = vwm_overlay_xwin_composed_height(vwm, xwin); /* fill the overlay picture with the background */ XRenderComposite(vwm->display, PictOpSrc, overlay_bg_fill, None, xwin->overlay.picture, 0, 0, 0, 0, 0, 0, xwin->attrs.width, height); /* draw the graphs into the overlay through the stencils being maintained by the sample callbacks */ XRenderComposite(vwm->display, PictOpOver, overlay_grapha_fill, xwin->overlay.grapha_picture, xwin->overlay.picture, 0, 0, xwin->overlay.phase, 0, 0, 0, xwin->attrs.width, height); XRenderComposite(vwm->display, PictOpOver, overlay_graphb_fill, xwin->overlay.graphb_picture, xwin->overlay.picture, 0, 0, xwin->overlay.phase, 0, 0, 0, xwin->attrs.width, height); /* draw the shadow into the overlay picture using a translucent black source drawn through the shadow mask */ XRenderComposite(vwm->display, PictOpOver, overlay_shadow_fill, xwin->overlay.shadow_picture, xwin->overlay.picture, 0, 0, 0, 0, 0, 0, xwin->attrs.width, height); /* render overlay text into the overlay picture using a white source drawn through the overlay text as a mask, on top of everything */ XRenderComposite(vwm->display, PictOpOver, overlay_text_fill, xwin->overlay.text_picture, xwin->overlay.picture, 0, 0, 0, 0, 0, 0, xwin->attrs.width, (xwin->overlay.heirarchy_end * OVERLAY_ROW_HEIGHT)); XRenderComposite(vwm->display, PictOpOver, overlay_snowflakes_text_fill, xwin->overlay.text_picture, xwin->overlay.picture, 0, 0, 0, xwin->overlay.heirarchy_end * OVERLAY_ROW_HEIGHT, 0, xwin->overlay.heirarchy_end * OVERLAY_ROW_HEIGHT, xwin->attrs.width, height - (xwin->overlay.heirarchy_end * OVERLAY_ROW_HEIGHT)); /* damage the window to ensure the updated overlay is drawn (TODO: this can be done more selectively/efficiently) */ damage.x = xwin->attrs.x + xwin->attrs.border_width; damage.y = xwin->attrs.y + xwin->attrs.border_width; damage.width = xwin->attrs.width; damage.height = height; region = XFixesCreateRegion(vwm->display, &damage, 1); vwm_composite_damage_add(vwm, region); } void vwm_overlay_rate_increase(vwm_t *vwm) { if (sampling_interval + 1 < sizeof(sampling_intervals) / sizeof(sampling_intervals[0])) sampling_interval++; } void vwm_overlay_rate_decrease(vwm_t *vwm) { if (sampling_interval >= 0) sampling_interval--; } /* comvenience function for returning the time delta as a seconds.fraction float */ static float delta(struct timeval *cur, struct timeval *prev) { struct timeval res; float delta; /* determine the # of whole.fractional seconds between prev and cur */ timersub(cur, prev, &res); delta = res.tv_sec; delta += (float)((float)res.tv_usec) / 1000000.0; return delta; } void vwm_overlay_update(vwm_t *vwm, int *desired_delay) { static int sampling_paused = 0; static int contiguous_drops = 0; float this_delta; init_overlay(vwm); gettimeofday(&maybe_sample, NULL); if ((sampling_interval == -1 && !sampling_paused) || /* XXX this is kind of a kludge to get the 0 Hz indicator drawn before pausing */ (sampling_interval != -1 && ((this_delta = delta(&maybe_sample, &this_sample)) >= sampling_intervals[sampling_interval]))) { vmon_sys_stat_t *sys_stat; /* automatically lower the sample rate if we can't keep up with the current sample rate */ if (sampling_interval != -1 && sampling_interval <= prev_sampling_interval && this_delta >= (sampling_intervals[sampling_interval] * 1.5)) { contiguous_drops++; /* require > 1 contiguous drops before lowering the rate, tolerates spurious one-off stalls */ if (contiguous_drops > 2) sampling_interval--; } else contiguous_drops = 0; /* age the sys-wide sample data into "last" variables, before the new sample overwrites them. */ last_sample = this_sample; this_sample = maybe_sample; if ((sys_stat = vmon.stores[VMON_STORE_SYS_STAT])) { last_user_cpu = sys_stat->user; last_system_cpu = sys_stat->system; last_total = sys_stat->user + sys_stat->nice + sys_stat->system + sys_stat->idle + sys_stat->iowait + sys_stat->irq + sys_stat->softirq + sys_stat->steal + sys_stat->guest; last_idle = sys_stat->idle; last_iowait = sys_stat->iowait; } vmon_sample(&vmon); /* XXX: calls proc_sample_callback() for explicitly monitored processes after sampling their descendants */ /* XXX: also calls sample_callback() per invocation after sampling the sys wants */ sampling_paused = (sampling_interval == -1); prev_sampling_interval = sampling_interval; } /* TODO: make some effort to compute how long to sleep, but this is perfectly fine for now. */ *desired_delay = sampling_interval != -1 ? sampling_intervals[sampling_interval] * 300.0 : -1; }